8 3/4" Rear Axle Service Manual

A,

GROUP 3

REAR AXLE

CONTENTS

Page

REAR AXLE A S S E M B L Y

(BW) RING GEAR 5

S P E C I F I C A T I O N S 23

Condition

REAR WHEEL NOISE

SERVICE DIAGNOSIS

.. Possible Cause

(a) Wheel L o o s e .

(b) S p a l l e d w h e e l b e a r i n g c u p or c o n e .

(c) Defective, brinelled w h e e l bearing.

(d) E x c e s s i v e axle s h a f t e n d play.

(e) B e n t or s p r u n g axle s h a f t flange.

Correction

(a) Tighten loose w h e e l nuts.

(b) C h e c k rear w h e e l bearings. If s p a d e d or worn, r e p l a c e .

(c) Defective or brinelled bearings m u s t be r e p l a c e d . C h e c k rear axle shaft e n d play.

(d) R e a d j u s t axle s h a f t e n d play.

(e) R e p l a c e bent or s p r u n g axle shaft.

SCORING OF (a) Insufficient lubrication.

DIFFERENTIAL GEARS

AND PINIONS

(b) Improper grade of lubricant.

(c) E x c e s s i v e s p i n n i n g of o n e w h e e l .

(a) R e p l a c e s c o r e d g e a r s . S c o r i n g m a r k s on t h e p r e s s u r e f a c e of gear teeth or in the bore are c a u s e d by i n s t a n t a n e o u s f u s i n g of the mating s u r f a c e s .

S c o r e d g e a r s s h o u l d be r e p l a c e d . Fill rear axle to required c a p a c i t y with proper lubricant.

S e e S p e c i f i c a t i o n s e c t i o n .

(b) R e p l a c e s c o r e d g e a r s . I n s p e c t all g e a r s a n d b e a r i n g s for p o s s i b l e d a m age. C l e a n out a n d refill axle to required c a p a c i t y with proper lubricant.

S e e Lubrication s e c t i o n .

(c) R e p l a c e s c o r e d g e a r s . I n s p e c t all g e a r s , pinion bores a n d shaft for s c o r i n g , or b e a r i n g s for p o s s i b l e d a m age. S e r v i c e a s n e c e s s a r y .

TOOTH BREAKAGE (RING (a) Overloading.

GEAR AND PINION)

(b) E r r a t i c c l u t c h operation.

(c) Ice-spotted p a v e m e n t s .

(d) Improper a d j u s t m e n t .

(a) R e p l a c e g e a r s . E x a m i n e other g e a r s a n d bearings for p o s s i b l e d a m a g e .

R e p l a c e parts a s n e e d e d . Avoid Overloading.

(b) R e p l a c e g e a r s , a n d e x a m i n e r e m a i n ing parts for p o s s i b l e d a m a g e . Avoid erratic c l u t c h operation.

(c) R e p l a c e g e a r s . E x a m i n e r e m a i n i n g parts for p o s s i b l e d a m a g e . R e p l a c e parts a s required.

(d) R e p l a c e g e a r s . E x a m i n e other parts for p o s s i b l e d a m a g e . Make s u r e ring gear a n d pinion b a c k l a s h is correct.

REAR AXLE NOISE (a) Insufficient lubricant. (a) Refill rear axle with correct amount

of the proper lubricant. S e e S p e c i f i c a tion s e c t i o n . A l s o c h e c k for l e a k s a n d c o r r e c t a s n e c e s s a r y .

(b) Improper ring gear a n d pinion a d j u s t - (b) C h e c k ring gear a n d pinion tooth ment. contact.

(c) U n m a t c h e d ring gear a n d pinion. (c) R e m o v e u n m a t c h e d ring gear a n d pinion. R e p l a c e with a new m a t c h e d gear a n d pinion s e t .

(d) Worn teeth on ring gear or pinion. (d) C h e c k teeth on ring gear a n d pinion for contact. If n e c e s s a r y , r e p l a c e with new m a t c h e d s e t .

3-2 REAR AXLE

A

Condition ^ Possible Cause Correction

(e) End play in drive pinion bearings. (e) Adjust drive pinion bearing preload.

(f) Side play in differential bearings. (f) Adjust differential bearing preload.

(g) Sure-Grip Differential moan and chat- (g) Drain and flush lubricant. See prater, cedure in Sure-Grip section of Group

LOSS OF

LUBRICANT (a) Lubricant level too high.

(b) Worn axle shaft oil seals.

(c) Cracked rear axle housing.

(d) Worn drive pinion oil seal.

(e) Scored and worn companion flange.

(f) Clogged breather.

(g) Loose carrier housing bolts or housing cover screws.

(a) Drain excess lubricant by removing filler plug and allow lubricant to level at lower edge of filler plug hole.

(b) Replace worn oil seals with new ones.

Prepare new seals before replacement.

(c) Repair or replace housing as required.

(d) Replace worn drive pinion oil seal with a new one.

(e) Replace worn or scored companion flange and oil seal.

(f) Clean breather thoroughly.

(g) Tighten bolts or cover screws to specifications and fill to correct level with proper lubricant.

OVERHEATING OF UNIT

(a) Lubricant level too low.

(b) Incorrect grade of lubricant.

(c) Bearings adjusted too tightly.

(d) Excessive wear in gears.

(e) Insufficient ring gear to pinion clearance.

(a) Refill rear axle.

(b) Drain, flush and refill rear axle with correct amount of the proper lubricant. See Specification Section.

(c) Readjust bearings.

(d) Check gears for excessive wear or scoring. Replace as necessary.

(e) Readjust ring gear and pinion backlash and check gears for possible scoring.

REAR AXLE

NOISE DIAGNOSIS

Most rear axle failures are relatively simple to locate and correct, although rear axle noise is a little more difficult to diagnose and make the necessary repairs. The most essential part of rear axle service is proper diagnosis of the problem.

A l l rear axles are noisy t o a certain degree. Gear noise is usually associated w i t h older axles, but this is not always true. New axles can also be noisy i f they are not properly adjusted or lack lubrication. Usually when new improperly set gears are noisy; the disturbing noise cannot be "adjusted o u t " once the gears are broken i n . Recent experience has shown that axle gears can often be readjusted to reduce excessive gear noise, i f they have been operated at normal break-in speeds f o r less than 500 miles. Regardless of what you've heard to the contrary, noisy gears w i l l not get quieter w i t h added mileage . . . they w i l l stay the same or get worse.

Slight axle noise heard only at certain speeds or under remote conditions must be considered normal.

Axle noise tends to " p e a k " at varying speeds and the noise is i n no way indicative of trouble i n the axle.

I f axle noise is present i n an objectionable f o r m , loud or at all speeds, an effort should be made t o isolate the noise as being i n one particular u n i t of the veh i d e . Many noises, reported as coming f r o m the rear axle actually originate f r o m other sources such as tires, road surfaces, wheel bearings, engine, transmission, exhaust, propeller shaft vibration, universal joint noise or body d r u m m i n g . A thorough and careful check should be made to determine the source of the noise before any disassembly and teardown of the rear axle is attempted.

The complete isolation of noise i n any one unit requires considerable skill and previous experience.

Eliminating certain type noises often baffle even the most experienced personnel. Often such practices as raising tire pressures to eliminate tire noise, listening for the noise at varying speeds under different load conditions such as; drive, float and coast, and under certain highway conditions, t u r n i n g the steering wheel f r o m left t o right to detect wheel bearing noise, w i l l aid even the beginner i n detecting certain alleged axle noises. Axle noises normally fall into two categories: gear noise and bearing noise.

To make a good diagnostic check f o r rear axle noise, a thorough road test is necessary. Select a level smooth blacktop or asphalt road. This w i l l reduce tire noise and body d r u m m i n g . Drive the car far enough to thoroughly w a r m up the axle to normal operating temperature.

Drive the car and note speed at which noise occurs.

REAR AXLE

3-3

Then stop car and, w i t h clutch disengaged or automatic transmission i n neutral, r u n engine slowly u p and down through engine speeds, corresponding to car speed at which noise was most pronounced, t o determine i f i t is caused by exhaust roar, or other engine conditions. Repeat, while engaging and disengaging clutch (transmission i n neutral), to determine if noise can only be isolated b y removing propeller shaft and operating transmission i n high).

TIRE NOISE

Tire noise is often mistaken for rear axle noise even though the noisy tires may be located on the f r o n t wheels. Tires that are unbalanced or worn unevenly or have surfaces of non-skid type design, or worn i n a saw tooth fashion are usually noisy and often produce noises that seem to originate i n the rear axle.

Tire noise changes with different road surfaces, but rear axle noise does not. Inflate a l l tires to approximately 50 pounds pressure (for test purposes only).

This w i l l materially alter noise caused by tires, but w i l l not affect noise caused by rear axle. Rear axle noise usually ceases when coasting at speeds under

30 miles per hour; however, tire noise continues, but with lower tone, as car speed is reduced. Rear axle noise usually changes when comparing drive and coast, but tire noise remains about the same.

Distinguish between tire noise and differential noise by noting i f noise varies with various speeds or sudden acceleration and deceleration; exhaust and axle noise show variations under these conditions while tire noise remains constant and is more pronounced at speeds of

20 to 30 miles per hour. F u r t h e r check for tire noise by d r i v i n g car over smooth pavements or d i r t roads

(not gravel) w i t h tires at normal pressure. I f noise is caused by tires, i t w i l l noticeably change or disappear and reappear w i t h changes i n road surface.

FRONT WHEEL BEARING NOISE

Loose or rough front wheel bearings w i l l cause noise which may be confused w i t h rear axle noises; however, front wheel bearing noise does not change when comparing drive and coast. L i g h t application of brake while holding car speed steady w i l l often cause wheel bearing noise to diminish, as this takes some weight off the bearing. Front wheel bearings may be easily checked for noise by jacking up the wheels and spinning them, also by shaking wheels to determine i f bearings are loose.

Rear suspension rubber bushings and spring insulators help to dampen out rear axle noise when properly and correctly installed. Check t o see that no metallic interference exists between the springs and springs hangers, shackles or " U " bolts. Metal to metal contact at those points may result i n telegraphing road noise and normal axle noise which would not be objectionable i f properly installed and tightened to specifications.

GEAR NOISE

Abnormal gear noise can be recognized easily because i t produces a cycling tone and w i l l be very pronounced through the speed range i n which i t occurs. Gear noise may be developed under one or more of the following conditions, " d r i v e " , " r o a d load",

"float" or "coast". Gear noise usually tends t o peak in a narrow speed range or ranges. Gear noise is more prominent between 30 to 40 mph and 50 to 60 mph.

Abnormal gear noise is quite rare and i f present i t usually originates f r o m scoring of the r i n g and drive pinion gear as a result of insufficient or improper lubrication of the axle assembly. The differential side gears and pinions very seldom cause trouble as they are only under loads when the rear wheels travel at different speeds; such as when t u r n i n g corners.

When objectionable axle noise is heard, note the driving condition and speed range. Remove the differential and carrier f r o m the axle housing on the 8-3/4" axle. Perform a tooth contact pattern check to determine i f the best possible pattern has been obtained.

If pattern is found to be unacceptable, reshim and adjust to obain the best possible pattern. I f after readjustment noise still persists, replace w i t h new gear set.

P R E - D I S A S S E M B L Y

INVESTIGATION

A close examination of the rear axle assembly prior to disassembly can reveal valuable information as to the extent and type of repairs or adjustments necessary. This information coupled w i t h the road test results w i l l provide a basis for determining the degree of disassembly required. Since the most frequent causes of axle noise are improper backlash or differential bearing preload, or both, a few simple adjustments may be a l l that is necessary to correct the complaint.

Therefore, before disassembly the following checks should be made; drive gear and pinion backlash, pinion bearing preload, and tooth contact pattern and these results recorded and analyzed. I t is felt that these measurements and their results w i l l aid you i n making the necessary repairs to the axle assembly.

BEARING NOISE (DRIVE PINION AND

DIFFERENTIAL)

Defective or damaged bearings generally produce a rough growl or grating sound, that is constant i n pitch and varies w i t h the speed of the vehicle. This fact w i l l allow you to diagnose between bearing noise and gear noise.

3-4 REAR AXLE

:

Drive pinion bearing noise resulting f r o m defective or damaged bearings can usually be identified b y a constant rough sound. Front pinion bearing noise is usually most pronounced on "coast", whereby rear pinion bearing is loudest on " d r i v e " . Pinion bearings are rotating at a higher rate of speed than the differential side bearings or the axle shaft bearings. These particular noises can be picked up best by road testing the vehicle i n question on a smooth road (black top).

However, extreme caution should be taken not to confuse tire noise w i t h bearing or gear noise. I f doubt should exist tire treads should be examined for irregularities that w i l l often produce such noise.

Differential bearing noise w i l l usually produce a constant rough tone which is much slower than the noise caused by the pinion bearings. and pinion nut torque must be reset to original settings upon reinstallation.

BACKLASH CLUNK

A

Excessive clunk on acceleration and deceleration can be caused by anyone of the following items or a combination; (excessive clearance between) (1) Differential pinion shaft to differential case, (2) Axle shaft to differential side gear splines, (3) Differential side gear hub to differential case counterbore, (4) Differential side gear to pinion, (5) W o r n thrust washers, (6)

Drive gear backlash. Measure and inspect components and replace as required and/or adjust to proper specifications.

ENGINE AND TRANSMISSION NOISE

REAR W H E E L BEARING NOISE

Defective or damaged rear wheel bearings produce a vibration or growl which continues w i t h car coasting and transmission i n neutral. A brinneled rear wheel bearing causes a w h i r r i n g noise. Spalled rear wheel bearings normally produce a noise similar to a growl, created f r o m either flaked or pitted rollers or bearings races. Unless the damage is severe, rear axle bearing noise is seldom heard above 30 mph.

To differentiate between wheel bearings and gear noise, road test the vehicle on a smooth road (blacktop) at medium and low speed. W i t h traffic permitting, swerve the vehicle sharply right to left. I f the noise i n question is caused by wheel bearings, i t w i l l usually increase when the vehicle is swerved and w i l l probably be coming f r o m the bearing on the loaded side.

If the noise i n question cannot be isolated an inspection of bearings w i l l be necessary.

Sometimes noises which seem to originate i n the rear axle are actually that of the engine or transmission. To diagnose which unit is actually causing the noise, observe the approximate vehicle speed and conditions under which the noise is most pronounced; stop the vehicle i n a quiet place to avoid any interfering noises. W i t h engine r u n n i n g and transmission i n neutral, r u n engine slowly up and down through engine speeds corresponding to approximate car speed at which the noise was most pronounced. I f a noise similar is produced i n this manner i t usually can be assumed that the noise was caused by the engine or transmission and not that of the rear axle.

PROPELLER SHAFT VIBRATION

KNOCK AT LOW S P E E D S

Low speed knock is usually caused by brinneled universal joints or differential side gear hub to counterbore clearance being too great. Inspect and replace universal joint or differential case and side gear as required.

DRIVE-LINE SNAP

A snap on a sudden start, either f o r w a r d or reverse, may be caused by a loose companion flange. Remove the propeller shaft and flange and reinstall 180 degrees f r o m original position. Pinion bearing preload

Objectional vibrations at high speed (65 M P H or higher) may be caused by a propeller shaft that is out of balance or worn universal joints. Out of balance may be due to a damaged or bent shaft.

To determine whether propeller shaft is causing the vibration i n question; road test the vehicle through speed range and note speed at which vibration is most pronounced. Shift transmission into lower gear range and drive car at same engine speed as when vibration was most pronounced i n direct drive and note any effect on vibration.

I f the vibration is still present at the same engine speed, whether i n direct drive or i n the lower gear, since the propeller shaft speed varies, this cannot be the fault. I f the vibration decreases or is eliminated i n the lower gear, then propeller shaft is at fault and should be rebalanced or replaced.

A-

REAR AXLE 3-5

REAR AXLE ASSEMBLY ZVa RING GEAR

INDEX

Page

Axle S h a f t s and B e a r i n g s . . . . . . . . . . . . . . . . . . . . . .

6

Pinion B e a r i n g Preload a n d Pinion Depth of

Page

Differential a n d C a r r i e r (Installation) 18

Differential C a s e 11

16

Drive G e a r and Pinion B a c k l a s h 17

9

G e a r Tooth C o n t a c t Pattern . . . . . . . . . . . . . . . . . . . . 17

R e m o v a l and R e p l a c e m e n t of Drive Pinion

Pinion B e a r i n g C u p Installation . . . . . . . . 13

GENERAL INFORMATION

The 8 - 3 / 4 " Rear Axle Assembly shown i n (Fig. 1), is a semi-floating type and may be divided into four subassemblies; flanged axle drive shafts w i t h related parts (Fig. 2.) differential w i t h drive gear, drive pinion with carrier, and the axle housing. Servicing of the above mentioned subassemblies, w i t h exception of the axle housing may be performed without removing the complete rear axle assembly f r o m the vehicle.

Gear ratio identification numbers w i l l be stamped on a metal tag and attached by means of the rear axle housing-to-carrier bolt.

Some 8 - 3 / 4 " large stem differential and carrier assemblies have incorporated a collapsible spacer which bears against the inner races of the front and rear bearing. This collapsible spacer is used to establish preload on the pinion bearings.

Adjustment of pinion depth of mesh is obtained by placing a machined shim between the pinion head and the rear pinion bearing cone.

The differential bearings are larger on both the conventional and Sure-Grip Differentials and are not interchangeable w i t h previous years bearings.

The Sure-Grip Differential is available as optional equipment in the 8 - 3 / 4 " rear axle assembly. The new

Sure-Grip Differential is of a two piece construction similar to the old type and is completely interchangeable w i t h the previous type and w i l l be serviced as a complete assembly only. Refer to the "Sure Grip Diff e r e n t i a l " Section of the Axle Group for the servicing procedure.

A D J U S T E R

S H A F T

BUMPER

H O U S I N G

W A S H E R

S U P P O R T

T E E

S C R E W

BOLT

G A S K E T

'

N

B O L T

*r* " - G A S K E T

N U T

C A R R I E R A N D C A P

F L A N G E

OIL S E A L

C O L L A R

G A S K E T

L E F T

O I L S E A L

RETAINER'

Fig. 1—8-3/4" Rear Axle Assembly

R I G H T

S H A F T

S T U D

NK967B

3-6 REAR AXLE

A

SHOULD T H E REAR A X L E BECOME SUBMERGED E A R L Y A X L E F A I L U R E RESULTING FROM CON-

IN WATER, T H E LUBRICANT MUST B E CHANGED TAMINATION OF T H E LUBRICANT B Y W A T E R

IMMEDIATELY T O AVOID T H E POSSIBILITY O F DRAWN INTO T H E VENT.

AXLE S H A F T S AND B E A R I N G S

SERVICE PROCEDURES

CAUTION: It is absolutely necessary that anytime an axle assembly is serviced, and the axle shafts are loosened and removed, the axle shaft gaskets and inner axle shaft oil seals must be replaced.

The service procedures f o r the removal and i n stallation of the axle shaft bearings and collars differ on the Imperial, due to a change i n the material hardness of the collar. I t w i l l be necessary that this procedure be followed to assure that axle shaft is not damaged i n any way d u r i n g the servicing.

Removal (All models)

(1) W i t h wheels removed, remove clips holding brake d r u m on axle shaft studs and remove brake d r u m .

(2) Using access hole i n axle shaft flange, remove retainer nuts, the r i g h t shaft w i t h threaded adjuster i n retainer plate w i l l have a lock under one of the studs that should be removed at this time.

(3) Attach axle shaft remover Tool C-3971 (Fig. 3) use Tool C-3971 and adapter SP-5168 on Imperial only, to axle shaft flange and remove axle shaft. Remove brake assembly and gaskets.

(4) Remove axle shaft o i l seal f r o m axle housing using Tool C-637 (Fig. 4).

(5) Wipe axle housing seal bore clean and install a new axle shaft o i l seal using Tool C-839 (Fig. 5). use of a torch in the removal of the axle shaft collars or bearings is an unsafe practice, because heat is fed into the axle shaft bearing journal and thereby weakens this area.

(1) Position axle shaft bearing retaining collar on a heavy vise or anvil and using a chisel, cut deep grooves into retaining collar at 90° intervals (Fig. 6).

This w i l l enlarge bore of collar and permit i t to be driven off of axle shaft.

(2) Remove bearing roller retainer flange b y cutting off lower edge w i t h a chisel (Fig. 7).

(3) Grind a section off flange of inner bearing cone (Fig. 8) and remove bearing rollers (Fig. 9).

(4) P u l l bearing roller retainer down as f a r as pos-

BLOCKS BEARING

REMOVING SP-5020

ADAPTER

SP-5021

y x

SCREWS \

> S

SP-5026

>*4

X

»

WASHERS

SP-320

ADAPTER

SP-5015 OR SP-5168 m v.

Disassembly (All Models except Imperial)

CAUTION: To prevent the possibility of damaging axle shaft seal surface, slide protective sleeve SP-

5041 over the seal surface next to bearing collar.

CAUTION: Under no circumstances should axle shaft collars or bearings be removed using a torch. The

/

SLEEVE

SP-5041

\

R : N G

- 3 L O C K

HOLDING SP-5017

Fig. 3-7oof Set C-3971

NK360A

FLANGE

A D J U S T E R

T O O L i

SHAFT i ! £ ! J l LOCK

S E A L

C J P

/ C O L L A R

BEARING

NK59A

Fig. 2—Axle Shaft Disassembled

Fig. 4—Removing Axle Shaft Oil Seal

REAR AXLE 3-7

Fig. 5-lnstalling Axle Shaft Oil Seal

Fig. 8—Flange Ground Off Inner Cone

SLEEVE

S P - 5 0 4 1

SLEFV-_

S P - 5 C M ] '

B E A R I N G

' ROLLER

MM

/ 4 * 4 N K 1 2 7 A

Fig. 6—Notching Bearing Retainer Collar sible and cut w i t h a pair of side cutters and remove

(Fig.

10).

(5) Remove roller bearing cup and protective sleeve SP-5041 f r o m axle shaft.

CAUTION: Sleeve SP-5041 should

not be used as a protector for the seal journal when pressing off the bearing cone, as it was not designed for this purpose.

(6) To avoid scuffing seal journal when bearing

N K 3 5 8

Fig. 9—Removing Bearing Rollers cone is being removed, i t should be protected by single wrap of .002 thickness shimstock held i n place by a rubber band (Fig. 11).

(7) Remove the bearing cone using Tool C-3971

(Fig. 3). Tighten bolts of tool alternately u n t i l cone is removed (Fig. 12).

SLEEVE . .. "

4

S P - 5 0 4 1 V

SLFEVc

S P - 5 0 4 1

U

s.

ft f 1 i

Fig. 7—Removing Roller Retainer

N X 3 5 9

Fig. 10—Cutting Out Roller Bearing Retainer

N N 1 2 4 A -

N K 3 6 2

Fig. I 1 — Seal Journal Protection

(8) Remove seal i n bearing retainer plate and replace w i t h new seal.

Assembly

(1) Install retainer plate and seal assembly on axle shaft.

(2) Lubricate wheel bearings w i t h Multi-Purpose

Grease N L G I Grade 2 EP.

(3) Install a new axle shaft bearing cup, cone and collar on shaft using Tool C-3971 (Fig. 13) and tighten bolts of tool alternately u n t i l bearing and collar are seated properly.

(4) Inspect axle shaft seal j o u r n a l for scratches and polish w i t h #600 crocus cloth i f necessary.

Disassembly (Imperial)

CAUTION: Under no circumstances should axle shaft collars or bearings be removed using a torch. The use of a torch in the removal of the axle shaft collars or bearings is an unsafe practice, because heat is fed into the axle shaft bearing journal and, thereby weakens this area.

(1) Slide protective sleeve SP-5041 over the seal

Fig. 13—Installing New Bearing and Collar surface next to bearing collar and tape i n place. This w i l l prevent the possibility of seal surface being damaged d u r i n g the cutting of roller retainer, grinding of collar and inner bearing race and splitting of collar.

(2) Remove bearing roller retainer flange by cutting off lower edge w i t h a chisel (Fig. 7).

(3) G r i n d axle shaft collar i n one position to approximate thickness of protective sleeve SP-5041.

A t same time grind a portion of inner bearing race so bearing rollers can be removed (Fig. 14).

(4) Position axle shaft bearing retaining collar on a heavy vise or anvil and using a chisel, cut a groove into collar at position that you previously ground.

Collar should split and, which i n t u r n w i l l enlarge bore and permit collar to be driven off of axle shaft.

(5) Remove bearing rollers at ground section of inner bearing race (Fig. 9).

(6) P u l l bearing roller retainer down as far as possible and cut w i t h a pair of side cutters and remove (Fig. 10).

Fig. 12—Removing Bearing Cone with Tool C-3971

Fig. 14—Collar and Inner Race Ground Prior to

Removal (Imperial)

A-

•REAR AXLE 3-9

(7) Remove roller bearing cup and protective sleeve

SP-5041 f r o m axle shaft.

CAUTION: Sleeve SP-5041 should not be used as a protector for the seal journal when pressing off the bearing cone, as it was not designed for this purpose.

(8) To avoid scuffing seal j o u r n a l when bearing cone is being removed, i t should be protected by a single wrap of .002 thickness shimstock held i n place by a rubber band (Fig. 11).

(9) Remove bearing cone using Tool C-3971 and adapter SP-5168. Tighten bolts of tool alternately u n t i l cone is removed (Fig. 12).

(10) Remove seal in bearing retainer plate and replace w i t h new seal.

Assembly (Imperial)

(1) Install retainer plate and seal assembly on axle shaft.

(2) Lubricate wheel bearings w i t h Multi-Purpose

Grease N L G I Grade 2 E.P. or equivalent.

(3) Install a new axle shaft bearing cup, cone on axle shaft using Tool C-3971 and adapter SP-5168 (Fig.

13) and tighten bolts of tool alternately u n t i l bearing is seated properly. Repeat same step for installing the collar.

(4) Inspect axle shaft seal j o u r n a l for scratches and polish with #600 crocus cloth i f necessary.

Installation

(1) Clean axle housing flange face and brake support plate thoroughly. Install a new rubber asbestos gasket on axle housing studs, followed by brake support plate assembly on left side of axle housing.

(2) Apply a thin coating of Multi-Purpose Grease,

N L G I Grade 2 E.P. or equivalent to the outside diameter of the bearing cup prior to installing i n the bearing bore. This operation is necessary as a corrosion preventative.

(3) Install foam gasket on the studs of axle housing and carefully slide axle shaft assembly through oil seal and engage splines i n differential side gear.

(4) Tap end of axle shaft l i g h t l y w i t h a nonmetallic mallet to position axle shaft bearing i n housing bearing bore. Position retainer plate over axle housing studs. Install retainer nuts and tighten 30-35 foot-pounds. Start by tightening bottom nut.

(5) Repeat step (1) for r i g h t side of axle housing.

(6) Back off threaded adjuster of r i g h t axle shaft assembly u n t i l inner face of adjuster is flush w i t h inner face of retainer plate. Carefully slide axle shaft assembly through oil seal and engage splines i n differential side gears.

(7) Repeat step (4). rear wheels must be off the ground, otherwise a false end play setting will occur.

(1) Using a dial indicator mounted on the left brake support (Fig. 15), T U R N T H E ADJUSTER

CLOCKWISE U N T I L BOTH W H E E L BEARINGS ARE

SEATED A N D THERE IS ZERO END P L A Y I N THE

A X L E SHAFTS. B A C K OFF T H E ADJUSTER COUN-

TERCLOCKWISE A P P R O X I M A T E L Y FOUR NOTCH-

ES TO ESTABLISH A N A X L E SHAFT END P L A Y

OF .008-.018 INCH.

(2) Tap end of left axle shaft lightly w i t h a nonmetallic mallet to seat r i g h t wheel bearing cup against adjuster, and rotate axle shaft several revolutions so that a true end play reading is indicated.

(3) Remove one retainer plate nut, install adjuster lock. I f tab on lock does not mate w i t h notch i n adjuster, t u r n adjuster slightly u n t i l i t does. Install nut and tighten 30-35 foot-pounds.

(4) Recheck axle shaft end play. I f i t is not w i t h i n the tolerance of .008-.018 inch, then repeat adjustment procedure.

(5) Remove dial indicator and install brake drum, d r u m retaining clips and wheel.

REAR AXLE HOUSING

Removal

(1) Raise vehicle and support body at front of rear springs.

(2) Block brake pedal i n the up position using a wooden block.

(3) Remove rear wheels.

(4) Disconnect hydraulic brake hose at connection on left side of underbody.

(5) Disconnect parking brake cable.

To maintain proper drive line balance when reassembling, make scribe marks on the propeller shaft universal joint and the pinion flange before removal.

(6) Disconnect propeller shaft at differential yoke

AXLE SHAFT END PLAY

CAUTION: When setting axle shaft end play, both

N K 1 2 8

Fig. 15—Measuring Axle Shaft End Play

3-10 REAR AXLE

A and secure i n an upright position to prevent damage to front universal joint.

(7) Remove shock absorber f r o m spring plate studs and loosen rear spring " U " bolt nuts and remove " U " bolts.

(8) Remove the assembly f r o m vehicle.

R e m o v a l

(1) Remove flanged axle drive shafts.

(2) Disconnect rear universal j o i n t and support propeller shaft up and out of the way to prevent damage to the front universal joint.

(3) Remove the rear axle lubricant.

(4) Loosen and remove the carrier-to-housing attaching nuts and l i f t the carrier assembly f r o m axle housing.

j i t

mm

Installation

(1) W i t h body of vehicle supported at front of rear springs, position the rear axle assembly spring seats over the spring center bolts.

(2) Install spring " U " bolts and tighten nuts to 45 foot-pounds and install shock absorbers on spring plate studs. (DO NOT OVER T I G H T E N " U " BOLT

NUTS.)

(3) Install propeller shaft (match scribe marks on propeller shaft universal j o i n t and pinion flange).

Tighten clamp screws to 15 foot-pounds.

(4) Connect parking brake cable.

(5) Connect hydraulic brake hose, bleed and adjust brakes.

(6) Install rear wheels.

(7) I f carrier was removed f r o m axle housing duri n g the removal operation, fill axle w i t h proper amount and type of lubricant; see "Specifications" i n

Lubrication section Group " 0 " .

Welding Rear Axle Housing

The axle housing should be completely disassembled i f i t is to be welded w i t h arc welding equipment. I t is also possible to weld the assembled housi n g w i t h gas welding equipment, i f precaution is taken to protect gaskets and heat treated parts.

D I F F E R E N T I A L AND C A R R I E R

• 1

KP19

Fig. 16—

Checking for Runout and Zero End Play

(2) Rotate drive gear several complete revolutions while noting total indicator reading. M a r k drive gear and differential case at point of m a x i m u m runout. The marking of differential case w i l l be very useful later i n checking differential case runout. Total indicator reading should be no more than .005 inch. I f r u n o u t exceeds .005 inch the differential case may be damaged, and a second reading w i l l be required after drive gear has been removed. This operation is covered d u r i n g "Differential Disassembly". Remove dial indicator.

(3) W i t h Tool C-3281 hold companion flange and remove drive pinion n u t and Belleville washer.

(4) Install companion flange remover Tool C-452 and remove flange (Fig. 17).

(5) Using a screwdriver and hammer, remove the drive pinion oil seal f r o m the carrier.

(6) While holding one hand over nose end of carrier, invert carrier i n stand. The f r o n t pinion bearing cone, shim pack and bearing spacer (where used) w i l l drop f r o m carrier.

(7) Apply identifying punch marks on differential bearing pedestals of carrier, differential bearing caps and bearing adjusters for reassembly purposes (Fig.

18).

T O O L

Disassembly

Side play and r u n o u t check taken d u r i n g disassembly w i l l be very useful i n reassembly.

(1) Mount carrier i n Stand DD-1014 and attach dial indicator Tool C-3339 to differential carrier flange i n a position so pointer of indicator squarely contacts back face of r i n g gear (Fig. 16). W i t h a screw driver positioned between bearing cap and differential case flange, then using a p r y i n g motion determine i f side play is present. I f side play is evident, remove adjuster lock and loosen adjuster slightly and retighten adjuster sufficiently to eliminate side play.

K P 5 B

T O O L "

Fig. 1

7—Removing Compvmlcn friange

A

REAR AXLE 3-11

Fig.

18—Marking Bearing Caps and Adjusters

(8) Remove both differential bearing adjuster lock screws and locks.

(9) W i t h a 3/4 inch socket, loosen bearing cap bolts

(one on each side) and back off bearing adjusters slightly using spanner wrench Tool C-406A; to remove differential bearing preload. Remove bearing cap bolts, caps and bearing adjusters.

(10) Remove differential and r i n g gear assembly w i t h bearing cups. Differential bearing cups must be kept w i t h respective bearing cones.

(11) Remove drive pinion and rear bearing assembly f r o m carrier.

Rear Pinion Bearing Removal

(1) Remove drive pinion rear bearing from large stem pinion with Tool C-293 and four (4) No. 37 plates

(Fig. 19).

(2) Using a flat end brass drift, remove front and rear pinion bearing cups. i n a vise equipped w i t h soft jaws (brass).

(2) Remove drive gear bolts. BOLTS A R E L E F T

H A N D THREAD. W i t h a non-metallic hammer, tap drive gear loose f r o m differential case pilot and remove.

(3) I f drive gear r u n o u t exceeded .005 inch i n step 2 (under "Carrier Disassembly"), recheck the case as follows: Install differential case and respective bearing cups i n carrier.

(4) Install bearing caps, cap bolts and bearing adjusters. Tighten bearing cap bolts down l i g h t l y and screw i n both adjusters w i t h spanner wrench Tool

C-406A.

(5) Tighten cap bolts and adjusters sufficiently t o prevent any side play i n bearings.

(6) Attach a dial indicator Tool C-3339 to carrier flange so pointer of indicator squarely contacts drive gear surface of differential case flange between outer edge flange and drive gear bolt holes (Fig. 20).

(7) Rotate differential case several complete revolutions while noting total indicator reading. This reading must not exceed .003 inch runout. I f r u n o u t is i n excess of .003 inch, differential case must be replaced.

In a case where the runout does not exceed

.003 inch it is often possible to reduce the runout by positioning the drive gear 130° from point of maximum runout when reassembling drive gear on differential case.

(8) W i t h a flat nose drift and hammer, remove differential pinion shaft lock p i n from back side of drive gear flange. (The hole is reamed only part way through, making i t necessary to remove lock p i n f r o m one direction.)

(9) W i t h a brass d r i f t and hammer, remove differential pinion shaft and axle drive shaft thrust block.

(10) Rotate differential side gears u n t i l each differential pinion appears at large opening of case.

D I F F E R E N T I A L C A S E

Disassembly

(1) Mount differential case and r i n g gear assembly

Fig. 19—Removing Drive Pinion Rear Bearing

Fig. 20—Checking Drive Gear Mounting

Flange Face Runout

3-12 REAR AXLE

A

S H A F T

T H R U S T W A S H E R

C O N E V PIN

/ B E A R I N G C O N E

B O L T

\

AND LOCK WASHER

\

L O C K

B E A R I N G C O N E

FLANGE

C O L L A P S I B L E \

A D J U S T E R S P A C E R \

CAP

/ CARRIER \

SEAL \

j / \

J / C U P

%

^'

J

^^J I j

D R I V E G E A R

A N D

-

P 1 N 1 G N y

WASHER

S I D E G E A R \ \ W A S H E R

T H R U S T W A S H E R

\ ^ T H R U S T B L O C K i

PINION THRUST WASHER BEARING

C O N E j S I D E G E A R

T H R U S T W A S H E R

PLUG

^ - C A P

"—ADJUSTER

GUARD

W A S H E R

L O C K

BOLT AND LOCK WASHER

KP1D

Fig.

2 1 —Differential Carrier Assembly (Large Stem Tapered Pinion)

Remove each pinion and thrust washer at that time.

(11) Remove both differential side gears and thrust washers.

Cleaning and Inspection (Fig* 21J

(1) Clean a l l parts i n a fast evaporating mineral spirits or a dry cleaning solvent and w i t h the exception of bearings, dry w i t h compressed air.

(2) Inspect differential bearing cones, cups and rollers for pitting, spalling o r other visible damage. I f replacement is necessary, remove bearing cones f r o m differential case w i t h Tool C-293 and adapter plates

No. 43 (Fig. 22).

(3) Inspect differential case f o r elongated or enlarged pinion shaft hole. The machined thrust washer surface areas and counterbores must be smooth and without metal deposits or surface imperfections. I f any of the above conditions exist, satisfactory correction must be made or the case replaced.

Inspect case f o r cracks or other visible damage which might render i t unfit for further service.

(4) Inspect differential pinion shaft f o r excessive wear i n contact area of differential pinions. Shaft should be smooth and r o u n d w i t h no scoring or metal pickup.

(5) Inspect differential side gears and pinions, they should have smooth teeth w i t h a u n i f o r m contact patt e r n without excessive wear or broken surfaces. The differential side gear and pinion thrust washers should be smooth and free f r o m any scoring or metal pickup.

(6) Inspect axle shaft thrust block f o r excessive wear or visible damage. The wear surface on the opposite ends of the blocks, must be smooth.

(7) Inspect differential pinion shaft lock p i n f o r damage or looseness i n case. Replace p i n or case as necessary.

(8) Inspect drive gear and pinion f o r w o r n or chipped teeth or damaged attaching bolt threads. I f replacement is necessary, replace both the drive gear and drive pinion as they are available i n matched sets only.

(9) Inspect drive pinion bearing cones, cups and rollers for pitting, spalling, excessive wear, or other

v n s c c o o

KP8

Fig, 22—Removing lOif^erentM Bearings

-REAR AXLE 3-13

visible damage. I f inspection reveals that either are unfit for further service, replace both cup and cone.

(10) Inspect differential carrier for cracks or other visible damage which would render i t unfit f o r further service. Raised metal on the shoulder of bearing cup bores incurred i n removing pinion cups should be flattened by use of a flat nose punch.

(11) Inspect drive pinion f o r damaged bearing journals and mounting shim surface or excessively worn splines. I f replacement is necessary, replace both the drive pinion and drive gear as they are available i n matched sets only.

(12) Inspect companion flange f o r cracks, worn splines, pitted, rough or corroded oil seal contacting surface. Repair or replace companion flange as necessary.

ASSEMBLY

LUBRICATE A L L PARTS B E F O R E ASSEMBLY WITH

LUBRICANT AS SPECIFIED IN (LUBRICATION

GROUP "O")

(1) Install thrust washers on differential side gears and position gears i n case.

(2) Place thrust washers on both differential pinions and through large window of differential case, mesh the pinion gears w i t h the side gears, having pinions exactly 180 degrees opposite each other.

(3) Rotate side gears 90 degrees to align pinions and thrust washers w i t h differential pinion shaft holes i n case.

(4) From pinion shaft lock p i n hole side of case, insert slotted end of pinion shaft through case, and the conical thrust washer, and just through one of the pinion gears.

(5) Install thrust block through side gear hub, so that slot is centered between the side gears.

(6) While keeping a l l of these parts i n proper alignment, push pinion shaft into case u n t i l locking pin hole i n pinion shaft is i n exact alignment w i t h its respective hole i n case. Install pinion shaft lock p i n through hole i n case f r o m pinion shaft side of drive gear flange.

The contacting surfaces of the drive gear and differential case flange must be clean and free of all burrs.

(7)

Using an Arkansas stone, relieve the sharp edge of the chamfer on the inside diameter of the r i n g gear

(Fig. 23).

This is very important otherwise during the installation of ring gear on differential case, the sharp edge will remove metal from the pilot diameter of case and can get imbedded between differential case flange and gear; causing gear not to seat properly.

(8) Position drive gear on differential case pilot, aligning threaded holes of drive gear w i t h those i n differential case flange.

(9) Insert drive gear screws (LEFT H A N D

THREADS) through case flange and into drive gear.

NU403

Fig. 23—Stoning Chamfer on Ring Gear

A f t e r a l l cap screws are properly started, tap drive gear against differential case flange w i t h a nonmetallic mallet.

(10) Position unit between brass jaws of a vise and alternately tighten each cap screw to 55 foot-pounds.

(11) Position each differential bearing cone on hub of differential case (taper away from drive gear) and w i t h installing Tool C-4086 install bearing cones.

A n arbor press may be used i n conjunction w i t h i n stalling tool.

CAUTION: Never exert pressure against the bearing cage, since

this would damage the bearing.

PINION BEARING CUP INSTALLATION

(1) Position pinion bearing cups squarely i n bores of carrier. Assemble Tool C-758-D4 (Fig. 24) by placing spacer SP-5387 followed by rear pinion bearing cone over main screw of tool and inserting i t into carrier f r o m gear side.

(2) Place front pinion bearing cone over main

G A U G E B L O C K SP-528 O R SP-3250 8

3

/

v>

A N D 9 % " A X L E

4

W R E N C H A % C R O S S B O R E A R B O R mf r \

V

SP

~

561

8 % " A X L E

• » 1 V x ^ SP-5183 9 % " A X L E

SCREW

S P

W A S

A E R

\

SP-538

4

SLEEVE

SP-1370

SPACER

^ W A S H E R

SP-1371

SP-2921 O R 5 3 8 7

8

3

/

4

" A X L E

SP-5184 9

3

/

4

" A X L E

T

S L E E V E S P A C E R

'SP-1682

S P

"

1 7 3 0

"

S L E E V E SP-2920

C O M P R E S S I O N

SLEEVE SP-535

S P A C E R

W A S H E R

SP-3639

C E N T R A L I Z I N G

W A S H E R y&

SP-534 Jj?

P I N I O N — C O M P R E S S I O N

L O C A T I N G T N U T SP-533

S P A C E R S P A C E R

SP-2919 SP-539

N U 4 1 8 A

Fig. 24—Rear Axle Setting Gauge Tool C-758-D4

3-14 REAR AXLE • — » —

screw of tool followed by compression sleeve SP-535, centralizing washer SP-534, and main screw n u t SP-

533. Hold compression sleeve w i t h the companion flange holding Tool C-3281 and tighten nut (Fig. 25) allowing tool to rotate as nut is being tightened i n order not to b r i n n e l bearing cone or cups.

Do not remove tool after installing cups.

SP-561 PINION LOCATING WASHER

PINION BEARING PRELOAD AND DEPTH OF

MESH S E T T I N G USING TOOL C-758-D4

The 8-3/4" large stem differential and carrier assembly has incorporated a collapsible spacer which bears against the inner races of the front and rear bearings. This collapsible spacer is used to establish pinion bearing preload. The large stem pinion requires the depth of mesh adjustment first while pinion bearing preload is the last operation performed.

The position of the drive pinion w i t h respect to the drive gear (depth of mesh) is determined by the location of the bearing cup shoulders i n the carrier and by the portion of the pinion i n back of the rear bearing. The thickness of the rear pinion bearing mounting shim suitable for the carrier can be determined by using Tool C-758-D4.

DEPTH OF MESH

(Large Stem Pinion)

Inspect differential bearing cups and cones, carrier for g r i t and d i r t or other foreign material. Clean ail parts i n fast evaporating mineral spirits or a dry cleaning solvent and w i t h the exception of bearing cones, dry w i t h compressed air.

Front Pinion Bearing

Cone and Cup Must Never Be Reused Under Any Circumstances.

(1) Assemble spacer SP-5387 to main section of tool followed by spacer SP-1730. Install rear pinion bearing cone over spacer SP-1730 and against spacer

SP-5387 (Fig. 26).

NY168C

Fig. 26-Tool C-758-D4 Installed in Housing

(8-3/4 Large Stem Pinion) position i n bearing cup. Install tool spacer, tool thrust washer and tool nut on shaft.

(3) W i t h nose of carrier up, place flange holding

Tool C-3281 on compression sleeve. Allow assembly to rotate while tightening nut to not more than 25-50 foot-pounds.

Always make sure bearing cones are lubricated with hypoid gear lubricant.

(4) T u r n tool several complete revolutions i n both directions to permit bearing rollers to seat. After bearing rollers are properly seated, check bearing preload by rotating tool w i t h an inch-pound torque wrench. The correct bearing preload should be f r o m

20-30 inch-pounds for new bearings.

(5) W i t h proper bearing preload set, invert carrier i n stand and install gauge block SP-528 or SP-3250 to the main screw attaching i t w i t h A l l e n screw securely

(Fig. 27). The flat portion of gauge block should be facing differential bearing pedestals.

(6) Position tool arbor SP-561 i n differential bearing pedestals of carrier (Fig. 28). Center the arbor so that an approximate equal distance is maintained at both ends. Position differential bearing caps and attaching bolts on carrier pedestals, and insert a piece

(2) Insert assembly into carrier and install f r o n t pinion bearing cone over tool shaft and i n its proper ft

iP^

A far' KP13B

Fig. 25—Seating Bearing Cup in Carrier Housing

Fig. 27—Installing Gauge Blo<sk on fool

A

REAR AXLE 3-15

(10) Reverse carrier i n stand so n u t of tool is i n upr i g h t position. Loosen compression nut, and support lower portion of tool i n carrier w i t h one hand, remove tool nut, centering washer and compression sleeve. Lower tool down and out of carrier.

(11) Remove front pinion bearing cone f r o m carrier housing.

(12) With stem of drive pinion facing up, add rear pinion bearing mounting shim you selected on pinion stem.

PINION BEARING PRELOAD

(Large Stem Pinion)

rig. 28—Installing Arbor in Carrier

of .002 inch shim stock between arbor and each cap.

Tighten cap bolts to 10 foot-pounds.

(7) Select a rear pinion bearing mounting shim which w i l l fit between cross arbor and gauge block.

This fit must be snug but not too tight (similar to the pull of a feeler gauge. (Fig. 29). This shim is then used i n determining the correct thickness shim f o r installation.

(8) To select a shim for installation, read the marking on end of pinion head (—0, — 1 , — 2 , + 1 , + 2 , etc). When m a r k i n g is —, (minus) add that amount to the thickness of shim selected i n step (7). When the marking is + (plus), subtract that amount. Example:

With a shim .036 inch thick and a pinion marked — 2 , install a shim .038 inch thick (.036 + .002 = .038).

Example: W i t h a shim .036 inch thick and a pinion marked + 2 , install a washer .034 inch thick, (.036

— .002 = .034) or when a shim .036 inch thick is too loose and .038 inch too thick, use .036 inch shim.

Treat other pinion markings i n a similar manner.

Shims are available i n one thousands of an inch increments.

(9) Remove differential bearing caps and remove tool arbor f r o m carrier. fig. 29—Determining Spacer Thickness

(1) Position rear pinion bearing cone on pinion stem (small side away f r o m pinion head). Make certain that the contacting surfaces of selected shim, rear bearing cone and pinion head are perfectly clean and free of any foreign particles.

(2) Lubricate front and rear pinion bearing cones w i t h hypoid gear lubricant. Install rear pinion bearing cone onto pinion stem, using Tool C-3095, press bearing cone into place. A n arbor press may be used i n conjunction with tool.

(3) Insert drive pinion and bearing assembly u p through carrier and install collapsible spacer followed by front pinion bearing cone on pinion stem. Install companion flange using Tool C-496 or DD-999 and holding Tool C-3281. This is necessary i n order to properly install front pinion bearing cone on stem due to interference fit. Remove tool from pinion stem.

CAUTION: During the installation of the front pinion bearing be careful not to collapse the spacer.

(4) Apply a light coat of sealer in seal bore of carrier casting and install drive pinion oil seal into carrier using Tool C-4109 or C-3980 (double lip synthetic rubber oil seal) or Tool C-3656 (single lip leather oil seal).

The proper tool must be used i n order to position the seal the proper depth into the carrier casting.

(5) W i t h pinion supported i n carrier, install anticlang washer on pinion stem. Install companion flange w i t h installing Tool C-496 or DD-999 and holding Tool

C-3281.

(6) Remove tools and install Belleville washer (convex side of washer up) and pinion nut.

(7) Hold universal j o i n t flange w i t h holding Tool

C-3281 and tighten pinion nut to remove end play i n pinion, while rotating the pinion to insure proper bearing seating.

(8) Remove holding tool and rotate pinion several complete revolutions i n both directions to permit bearing rollers to seat.

(9) Tighten pinion n u t to 170 foot-pounds and measure pinion bearing preload by rotating pinion using an inch-pound torque wrench. The correct preload specifications are 20-35 inch-pounds f o r new bear-

3-16 REAR AXLE

- A

ings or 10 inch-pounds over the original i f the old rear pinion bearing is being reused. Correct bearing preload readings can only be obtained w i t h nose of carrier i n upright position. Continue tightening of pinion n u t i n small increments and checking pinion bearing preload u n t i l proper preload is obtained. Bearing preload should be u n i f o r m d u r i n g complete revolution. A preload reading that varies during rotation indicates a binding condition which has to be corrected. The assembly is unacceptable i f final pinion nut torque is below 170 foot-pounds or pinion bearing preload is not w i t h i n the correct specifications.

NOTE: UNDER NO CIRCUMSTANCES SHOULD T H E

PINION N U T B E BACKED OFF TO LESSEN PRE-

LOAD. I F THIS IS DONE A N E W COLLAPSIBLE

SPACER MUST B E I N S T A L L E D A N D N U T RE-

TIGHTENED U N T I L PROPER PRELOAD IS OB-

TAINED. being careful not to collapse the spacer.

Apply a light coat of sealer to drive pinion o i l seal and carrier casting bore and install drive pinion o i l seal w i t h Tool C-4109 or C-3980 (synthetic rubber seal or Tool C-3656 (leather seal). Install anti-clang washer and universal j o i n t flange, Belleville washer (convex side of washer up) and nut. Tighten the pinion n u t to

170 foot-pounds and using an inch-pounds torque wrench rotate the pinion to determine preload. The correct preload specifications are 20-30 inch-pounds for new bearings or 10 inch-pounds over the original i f the old rear pinion bearing is being reused. I f preload is not correct, continue to tighten pinion nut i n small increments and checking preload u n t i l preload on pinion bearings is correct. A m i n i m u m of 170 footpounds of torque is required on pinion nut.

Under no circumstances should the pinion nut be backed off to lessen preload. If this is done a new pinion bearing collapsible spacer must be installed and nut retightened until proper preload is obtained.

DEPTH OF MESH

(Without

Using Tool

C-758-D4)

If the differential assembly was satisfactorily quiet before being disassembled, the drive pinion must be assembled w i t h new pinion bearings. I f replacement parts are installed, a complete readjustment is necessary; the proper thickness shim must be selected and installed. The drive gear and pinion are manufactured and lapped i n matching sets and are available in matched sets only. The adjustment position i n which the best tooth contact is obtained is marked on the end of the pinion head.

To obtain the proper pinion setting i n relation t o the drive gear, the correct thickness mounting shim must be selected before the drive pinion is installed i n the carrier. The p i n i o n bearing mounting shims are available i n one thousands increments f r o m .020-.038 inch. To select the proper thickness shim, proceed as follows: I t w i l l be noted that the head of the drive pinion is marked w i t h a plus ( + ) or minus (—) sign followed by a number ranging f r o m 1 to 4, or zero (0) marking.

I f the old and new pinion have the same m a r k i n g and i f the original bearing is being reused, use a mounting shim of the same thickness. B u t i f the old pinion is marked zero (0) and t h e new pinion is marked + 2 , t r y a .002 i n c h thinner shim. I f the new pinion is marked — 2 , t r y a .002 inch thicker shim.

Installation of Differential and Ring Gear in

Carrier

(1) Holding differential and r i n g gear assembly w i t h bearing cups on respective bearing cones, carefully install the assembly into carrier.

(2) Install differential bearing caps, on respective sides, making certain that identification marks on caps correspond w i t h those on carrier. Install cap bolts and tighten bolts of each cap by hand.

(3) Install differential bearing adjusters, on respective sides, making certain that identification marks correspond. Screw adjuster i n by hand. N o attempt should be made to apply any excessive pressure at this time.

(4) Using spanner wrenches Tool C-406A to square bearing cups w i t h bearing cone, t u r n adjusters " I N " u n t i l cups are properly square w i t h bearings and end play is eliminated w i t h some backlash existing between the drive gear and pinion (Fig. 30).

Pinion Bearing Preload (Large Stem)

After selecting the correct pinion bearing mounting shim and installing i t behind the rear pinion bearing cone proceed as follows: Install the pinion assembly into the carrier. Install the new collapsible spacer followed by new front pinion bearing cone on pinion stem. Press front pinion bearing cone on pinion stem,

KP20A

Fig.

30—Adjusting Differential Bearings

-REAR AXLE 3-17

(5) Tighten one differential bearing cap bolt on each side to 85-90 foot-pounds.

P A T T E R N C L O S E

TO C E N T E R

DRIVE GEAR AND PINION BACKLASH

Correct drive gear and pinion backlash when properly set is .006 to .008 inch at point of m i n i m u m backlash. Rotate drive pinion and r i n g gear several revolutions i n both directions i n order to seat the bearing rollers. This is necessary before setting backlash.

(1) Attach a dial indicator Tool C-3339 to carrier flange so pointer of indicator is squarely contacting one drive gear tooth (drive side) (Fig. 31).

(2) Measure backlash between drive gear and pinion at four positions, approximately 90 degrees apart.

After point of least backlash has been determined, mark drive gear.

Do not rotate drive gear from point of least backlash until all adjustments have been completed.

(3) Using Tool C-406A (spanner wrench) t u r n both bearing adjusters equally (in same direction) u n t i l backlash between drive gear and pinion is .0005 to

.0015 inch.

This backlash variation is given to permit alignment and installation of the bearing adjuster lock, lockwasher and attaching screw. The adjuster must only be turned in a clockwise direction and under no circumstances should be backed off.

(4) Install adjuster lock on bearing cap, back-face side of drive gear. Tighten lock screw to 15 to 20 foot-pounds.

Differential Bearing Preload

(1) T u r n bearing adjuster (tooth side of drive gear)

(Fig. 32) i n a notch at a time (notch referred to is the adjuster lock holes) u n t i l backlash between drive gear and pinion is a m i n i m u m of .006 to .008 inch. This w i l l preload differential bearings and establish correct backlash.

Fig. 31—Measuring Backlash

Gear and Pinion

KP21

between Drive

HEEL END-Da,yz

SIDE (CONVEX)

H E E L E N D — C O A S

T

S I D E

( C O N C A V E /

N R ]

°

8

Fig. 32—Desired Tooth Contact Under Light Load

(2) Tighten the remaining two differential bearing cap bolts to 85-90 foot-pounds.

(3) Install remaining adjuster lock, lockwasher and attaching screw. Tighten to 15-20 foot-pounds.

GEAR TOOTH CONTACT PATTERN

The gear tooth contact pattern w i l l disclose whether the correct rear pinion bearing mounting shim has been installed and the drive gear backlash set properly. Backlash between the drive gear and pinion must be maintained w i t h i n the specified limits u n t i l correct tooth contact pattern is obtained.

(1) Apply a t h i n film of red or white lead on both the drive and coast side of the drive gear teeth. Rotate drive gear one complete revolution i n both directions while load is being applied w i t h a r o u n d bar or screwdriver between the carrier casting and differential case flange. This action w i l l leave a distinct contact pattern on both the drive and coast side of the drive gear teeth.

(2) Observe the contact pattern on the drive gear teeth and compare w i t h those i n figures 32, 33 and 35 to determine i f pattern is properly located. W i t h pinion depth of mesh and gear backlash set properly, your contact pattern should resemble that i n (Fig. 32).

Notice that the correct contact pattern is well centered on both drive and coast sides of the teeth. When tooth contact patterns are obtained b y hand, they are apt to be rather small. Under the actual operating load, however, the contact area increases.

(3) I f after observing the contact pattern you find it resembles that i n (Fig. 33), the drive pinion is too f a r away f r o m centerline of the r i n g gear, the contact pattern w i l l appear high on the heel on drive side and high on toe on coast side. To correct this type tooth contact pattern, increase the thickness of the rear pinion bearing mounting spacer (Fig. 34), which w i l l cause the high heel contact on drive side to lower and move toward the toe; the high toe contact on coast side w i l l lower and move toward the heel.

3-18 REAR A X L E -

- A

THICKER S P A C E R N E E D E D

(6) Install rear wheels and tighten t o 65 footpounds.

LUBRICATION

. 4 .

' • • r V . W

HEEL END-DRIVE

SIDE (CONVEX) "*

HEEL E N D - C O A S T

SIDE (CONCAVE)

N

Fig. 33—incorrect Tooth Contact Pattern

(Increase Spacer Thickness)

(4) I f after observing the contact p a t t e r n y o u find i t resembles that i n (Fig. 35), the drive pinion is too close to the r i n g gear, the pattern w i l l appear low on the toe on drive side and low heel contact on coast side. To correct this type tooth contact pattern, decrease the thickness of the rear pinion bearing mounti n g spacer (Fig. 36), which w i l l cause the l o w toe contact on drive side t o raise and move toward the heel; l o w heel contact on coast side w i l l raise and move toward the toe.

DIFFERENTIAL AND CARRIER

R 1

"

Refill axle assembly w i t h Multipurpose Gear L u b r i cant, as defined by MIL-L-2105B (API GL-5) should be used i n all rear axles w i t h conventional differentials;

Chrysler Hypoid Lubricant part number 2933565 is an oil of this type and is recommended or an equivalent be used.

I n Sure-Grip axles on all 1970 Vehicles i t is recommended that only Chrysler Hypoid Lubricant part number 2933565 or an equivalent be used. This l u b r i cant, recommended f o r conventional differentials too, contains special additives to provide proper differential durability and performance.

Anticipated Temperature Range Viscosity Grade

Above — 10°F. SAE

90

As

low as — 30°F. SAE 80

Bleow — 3 0 ° F . S A E 75

REMOVAL AND REPLACEMENT OF DRIVE

PINION FLANGE AND OIL SEAL IN VEHICLE

Installation

(1) Thoroughly clean the gasket surfaces of the carr i e r and rear axle housing.

(2) Using a new gasket, install the carrier assembly into the axle housing. Tighten the carrier to axle housi n g nuts to 45 foot-pounds.

(3) Refer to "Installation of Rear Axle Shaft," when installing and setting axle shaft end play.

(4) Install propeller shaft (match scribe marks on propeller shaft universal j o i n t and pinion flange).

Tighten clamp screws to 15 foot-pounds.

(5) Remove wooden block f r o m under brake pedal and bleed and adjust brakes.

PATTERN MOVES TOWARD CENTER

AND DOWN

/ - TOE / ~ \

On large stem carriers which use the collapsible spacer to obtain pinion bearing preload, the following procedure f o r the removal and replacement of the drive pinion flange and pinion o i l seal must be followed to assure that the proper bearing preload is maintained i n the axle assembly. I f this procedure is not followed i t could result i n a premature failure of the axle.

(1) Raise vehicle on hoist and make scribe marks on propeller shaft universal joint, drive pinion flange and end of pinion stem.

(2) Disconnect propeller shaft at pinion flange and secure i n an upright position to prevent damage to f r o n t universal joint.

(3) Remove the rear wheels and brake drums to prevent any drag or a possible false preload reading could occur.

THINNER SPACER NEEDED

•N

^-COAST

DE (CONCAVE)

N R 2 0 0

Fig. 34—Effect on Tooth Contact Pattern as

Spacer Thickness is Increased

HEEL E N D - D R I V E

SIDE ( C O N V E X )

^jgaEND-COAST

SIDE iCONCAVEi NR201

Fig. 35—Incorrect Tooth Contact Pattern

(Decrease Spacer Thickness)

A

REAR AXLE 3-19

(4) Using inch-pound torque wrench C-685 measure pinion bearing preload by rotating pinion w i t h handle of wrench floating, read the torque while wrench is moving through several complete revolutions and record. This operation Is very Important

because preload must be carefully reset when reassembling.

(5) W i t h Tool C-3281 hold companion flange and remove drive pinion nut and Belleville washer.

(6) Install companion flange remover Tool C-452 and remove flange. Lower rear of vehicle to prevent lubricant leakage.

(7) Using a screwdriver and hammer, remove the pinion oil seal f r o m the carrier and clean the oil seal seat.

(8) Check splines on pinion shaft stem to be sure they are free of burrs or are not w o r n badly. I f burrs are evident remove them using crocus cloth by working i n a rotational motion. Wipe the pinion shaft clean.

(9) Inspect companion flange f o r cracks, w o r n splines, pitted, rough or corroded o i l seal contacting surface. Repair or replace companion flange as necessary.

(10) Apply a light coat of sealer i n seal bore of carrier and install drive pinion oil seal into carrier using

Tool C-4109 or C-3980 (Double l i p synthetic rubber o i l seal) or Tool C-3656 (single l i p leather o i l seal). The proper tool must be used i n order to properly position the seal the correct depth into the carrier casting.

(11) Position companion flange on pinion stem being careful to match scribe marks made previously before removal.

(12) Install companion flange w i t h installing Tool

C-496 or DD-999 and holding Tool C-3281.

(13) Remove tool and install Belleville washer (convex side of washer up) and pinion nut.

(14) Hold universal joint flange w i t h holding Tool

C-3281 and tighten pinion nut to 170 foot-pounds. Rotate pinion several complete revolutions to assure that bearing rollers are properly seated. Using an inch-pound torque wrench C-685 measure pinion bearing preload. Continue tightening pinion n u t and

P A T T E R N M O V E S

INWARD AND

U P

HEEL E N D — D R I V E

S I D E ( C O N V E X )

'-:EEL E N D - COAST

S I D E ( C O N C A V E )

N R 2 0 2

Fig.

36—Effect on Tooth Contact Pattern as Spacer

Thickness is Decreased checking preload u n t i l preload is at the original established setting you found i n step 4. Under no circumstances should the preload be more than 5 inchpounds over the established setting found at time of checking i n step 4 of procedure.

Bearing preload should be u n i f o r m during a complete revolution. A preload reading that varies during rotation indicates a binding condition which has to be corrected. The assembly is unacceptable i f final pinion nut torque is below 170 foot-pounds or pinion bearing preload is not w i t h i n the correct specifications.

CAUTION: Never back off the pinion nut to lessen pinion bearing preload. If the desired preload is exceeded a new collapsible spacer must be installed and nut retightened until proper preload is obtained. In addition, the universal joint flange must never be hammered on, or power tools used.

(15) Install propeller shaft (match scribe marks on propeller shaft universal point and pinion flange).

Tighten clamp screws to 15 foot-pounds.

(16) Install the rear brake drums and wheels and tighten nuts 65 foot-pounds.

(17) Raise the vehicle to a level position so axle assembly is at correct r u n n i n g position and check lubricant level. A d d the correct type of lubricant required to b r i n g lubricant to proper level.

SURE-GRIP DIFFERENTIAL

INDEX

Installing Sure Grip Differential and

Page

Sure Grip Differential 21

Carrier Assembly 22

Lubrication 22

Sure Grip Differential Identification . . . . . 20

Sure Grip Differential Noise . . . . . . . . . . . . . . . . . . . . 20

Page

Testing Sure Grip Differential 21

G E N E R A L INFORMATION

A new Sure-Grip differential being offered as a special equipment option i n the 8-3/4" rear axles

(Fig. 1).

The Sure-Grip differential design is basic and simple and consists of a two piece case construction and is completely interchangeable w i t h the conventional

3-20

REAR AXLE'

A

Fig. 1—Sure-Grip Differential differential and also the previous type Sure-Grip differential (Fig. 2).

A conventional differential allows the driving wheels to rotate at different speeds while dividing the driving torque equally between them. This function is ordinarily desirable and satisfactory. However, the total driving torque can be no more than double the torque at the lower-traction wheel. When traction conditions are not the same f o r both d r i v i n g wheels, a portion of the available traction cannot be used.

The SURE-GRIP differential allows the driving wheel w i t h the better traction condition to develop more d r i v i n g torque than the other wheel, so that the total driving torque can be significantly greater than w i t h a conventional differential.

SURE-GRIP is not a locking differential. I n normal driving conditions the controlled internal friction is easily overcome during cornering and t u r n i n g so that the driving wheels can t u r n at different speeds. Extreme differences i n traction conditions at the d r i v i n g wheels may permit one wheel to spin.

SURE-GRIP has been engineered to perform its specialized functions w i t h m i n i m u m effect on normal vehicle operations.

The cone clutch SURE-GRIP differentials are similar to corresponding 8-3/4 conventional differentials except f o r the incorporation of the helix-grooved cones that clutch the side gears to the differential case. The grooves assure maximum lubrication of the clutch surface during operation. The cone brakes and side gears are statically spring preloaded to provide an internal resistance to the differential action w i t h i n the differential case itself. This internal resistance assures an adequate amount of p u l l while under extremely low tractive conditions such as mud, snow or ice when encountered at one of the rear wheels.

During torque application to the axle, the initial spring loading of the cone brakes is supplemented by the gear separating forces between the side gears and differential pinions which progressively increases the friction i n the differential. I t should be remembered that the Sure-Grip differential is not a positive locking type and w i l l release before excessive d r i v i n g force can be applied to one wheel.

SURE-GRIP DIFFERENTIAL IDENTIFICATION

Identification of sure-grip differential assembly can easily be made by l i f t i n g both rear wheels off the ground and t u r n i n g them. I f both rear wheels t u r n i n the same direction simultaneously, the vehicle is equipped w i t h a Sure-Grip Differential. Another means of identification is by removing the filler plug and using a flashlight to look through the filler plug hole to identify the type of differential case.

SERVICE PROCEDURES

SURE-GRIP DIFFERENTIAL NOISE

(Chatter—

Moan)

Noise complaints related to rear axles equipped w i t h cone-clutch SURE-GRIP should be checked to determine the source of the noise. I f a vehicle ride check produces the noise i n turns b u t not straight ahead, the probable cause is incorrect or dissipated rear axle lubricant. The following draining and flushi n g procedure has been established f o r the Sure-Grip

Differential before i t is removed f r o m the vehicle and replaced.

CAUTION: When servicing vehicles equipped with

Sure-Grip differentials do not use the engine to rotate axle components unless both rear wheels are clear off the ground. Sure-Grip equipped axles can exert a significant driving force if one wheel is in contact with floor and could cause the vehicle to move.

(1) W i t h lubricant of rear axle assembly at operating temperature raise car on hoist so rear wheels are free to t u r n .

(2) Loosen and remove fill plug and using a suction gun remove as much of the old lubricant as possible.

(3) F i l l axle to proper level w i t h multi-Purpose Hypoid Gear Lubricant Part Number 2933565 or equivalent. Reinstall fill plug and tighten.

(4) Start engine of vehicle and engage i n gear and r u n on hoist w i t h rear wheels free to t u r n at approximately 40 MPH for ten (10) minutes. This thoroughly circulates the lubricant and brings i t to operating temperature.

(5) Stop vehicle and remove the fill plug and using a suction gun remove as much of the lubricant as possible.

PINIONS

DIFFERENTIAL

CASE

REAR AXLE 3-21

SIDE GEARS

CONE CLUTCH

COIL SPRING

LUBRICATION

POCKET

LUBRICATION

GROOVES

NU405

Fig.

2-Sme-Grip Differential (Schematic)

(6) Refill axle to proper level w i t h multi-Purpose

Hypoid Gear Lubricant Part Number 2933565 or equivalent. Reinstall fill plug and tighten.

(7) Lower vehicle on hoist and r e t u r n to customer to drive and evaluate f o r approximately 100 miles to determine i f lubricant corrects the noise complaint.

If after the vehicle is driven approximately 100 miles and the noise condition is still evident, remove the differential and carrier assembly and replace the

Sure-Grip Differential.

The Sure-Grip Differential and the internal parts are serviced as an assembly only. performing properly and should be removed and replaced. The Sure-Grip Differential and internal parts are serviced as a complete assembly only.

Under no circumstances should the differential be removed and disassembled and reinstalled.

SURE-GRIP DIFFERENTIAL

CAUTION: During removal and installation of axle shafts, DO NOT rotate one axle shaft unless both are

TESTING SURE-GRIP DIFFERENTIAL

The Sure-Grip differential can be checked to determine i f its performance is satisfactory without removing the differential and carrier assembly f r o m the vehicle.

(1) Position vehicle on hoist w i t h engine off and the transmission selector lever i n park i f automatic or in low gear i f manual.

(2) Attempt to rotate wheel by applying t u r n i n g force w i t h hands gripping t i r e tread area (Fig. 3).

(3) I f you find i t extremely difficult, i f not impossible to manually t u r n either wheel, you can consider the sure-grip differential to be performing satisfactorily. I f you find i t relatively easy to continuously t u r n either wheel smoothly then the differential is not

NU406

Fig.

3—Testing Sure-Grip Differential Effectiveness

3-22 REAR AXLE

A in position. Rotation of one axle shaft without the other in place may result in misalignment of the two spline segments with which the axle shaft spline engages, and will necessitate difficult realignment procedures when shaft is installed.

R e m o v a l

Follow the same procedure outlined under conventional differential removal.

Cleaning and Inspection

(1) Clean the Sure-Grip differential assembly i n a fast evaporating mineral spirits or a dry cleaning solvent and w i t h exception of bearings, d r y w i t h compressed air.

(2) Inspect differential bearing cones, cups and r o l l ers f o r pitting, spalling or other visible damage. I f replacement is necessary, remove bearing cones f r o m differential case using Tool C-293 and adapter plates

No. 43.

(3) Visually inspect differential case f o r cracks or other visible damage which might render i t unfit f o r further service. w i l l remove metal from the pilot diameter of case and can get imbedded between differential case flange and gear; causing gear not to seat properly.

(4) Position r i n g gear on differential case pilot aligning threaded holes of r i n g gear w i t h those i n differential case flange.

(5) Insert drive gear screws (left hand threads) through case flange and into r i n g gear. After all cap screws are properly started, tap r i n g gear against differential case flange w i t h a non-metallic mallet.

(6) Position differential case unit between brass jaws of a vise and alternately tighten each cap screw to 55 foot-pounds.

NOTE: Before installation of differential case into carrier lubricate the inside of differential assembly w i t h

Multi-Purpose Hypoid Gear Lubricant Part Number

2933565 or equivalent. Do not use any other lubricant other than this special lubricant.

(7) Follow procedure outlined i n conventional axle assembly for setting drive pinion depth of mesh, drive gear backlash adjustment and bearing preload adjustment.

Assembly

If during cleaning and inspection the differential bearings were found to be unfit f o r further use and were removed follow this procedure for installation of new bearings.

(1) Position each differential bearing cone on hub of differential case (taper away f r o m drive gear) and w i t h installing Tool C-4086, install bearing cones. A n arbor press may be used i n conjunction w i t h installing tool.

CAUTION: Never exert pressure against the bearing cage, since this would damage the bearing.

(2) I f the r i n g gear was removed f r o m the sure-grip differential case or is being replaced w i t h a new r i n g gear for any reason, new nylok drive gear screws must be installed.

IMPORTANT: The procedure for installing the r i n g gear on differential case must be followed so the r i n g gear seats on the differential case properly.

(3) Using an Arkansas stone, relieve the sharp edge of the chamfer on the inside diameter of the r i n g gear (Fig. 23 i n 8-3/4" Axle section of this group).

This is very important, otherwise during the installation of r i n g gear on differential case, the sharp edge

INSTALLING S U R E - G R I P DIFFERENTIAL

AND CARRIER ASSEMBLY

(1) Using a new gasket install carrier assembly i n axle housing. Tighten mounting nuts to 45 footpounds.

(2) Refer to "Installation of Rear Axle Shaft", when installing axle shafts.

(3) Connect the rear universal joint.

(4) Before lowering the rear wheels of the vehicle to the floor, adjust rear brakes.

CAUTION: Both rear wheels must be raised off the floor when adjusting brakes.

LUBRICATION

Every six months check the fluid level i n the axle through the filler plug hole. When checking the level, be sure the vehicle is i n a level position on an axle or drive on type hoist. "See Lubrication Section'' f o r proper level of specific axle assembly.

I n Sure-Grip Differentials, use only the Multi-Purpose Hypoid Gear Lubricant Part Number 2933565 or equivalent. Do not use any other lubricant other than this special lubricant.

-TIGHTENING R E F E R E N C E 3-23

SPECIFICATIONS

T Y P E

R i n g G e a r D i a m e t e r . . . . . . . . . . . .

P I N I O N B E A R I N G S

T y p e

N u m b e r U s e d . . . .

A d j u s t m e n t

(Large

Stem)

P r e - L o a d Torque ( S e a l R e m o v e d )

D I F F E R E N T I A L B E A R I N G S

T y p e

Number U s e d ,

A d j u s t m e n t

R I N G G E A R A N D P I N I O N

S e r v i c e d in

R i n g G e a r R u n o u t

B a c k L a s h

8-3

/4" Axle

S e m i - F l o a t i n g Hypoid

8.750

T a p e r e d Roller

2

C o l l a p s i b l e S p a c e r

20 to 30 i n c h - p o u n d s

T a p e r e d Roller

2

A d j u s t i n g Nut

Matched S e t s

.005" Max.

.006

to

.008"

D I F F E R E N T I A L S I D E G E A R C L E A R A N C E

With G a u g e

W H E E L B E A R I N G S

Type

A d j u s t m e n t

E n d Play

Lubrication

.001 to

.012"

T a p e r e d Roller

. A d j u s t i n g Nut

.008-.018

Automotive Multi P u r p o s e

G r e a s e N L G I grade

2

L U B R I C A T I O N

C a p a c i t y 4.4 Pints (3-1/2 Pints Imp. Meas.)

T y p e Multi-Purpose G e a r L u b r i c a n t , a s defined by M I L - L - 2 1 0 5 B (API G L - 5 ) should be u s e d on all rear a x l e s ; s u c h a lubricant is a v a i l a b l e under Part No.

2933565 C h r y s l e r Hypoid G e a r L u b r i c a n t or a n e q u i v a l e n t be u s e d .

TIGHTENING REFERENCE

8-3/4" Axle

Pounds

Foot Inch

Differential B e a r i n g C a p Bolts 90

R i n g G e a r to Differential C a s e Bolts (Left Hand T h r e a d ) 55

Drive Pinion F l a n g e Nut

(Large S t e m )

170 (Min)

C a r r i e r to Axle H o u s i n g Bolt Nuts 45

Axle S h a f t R e t a i n e r Nuts 35

Propeller S h a f t Bolts (Rear) 15

S p r i n g C l i p (U Bolt) Nuts 45

Wheel S t u d Nuts

65

S h o c k Absorber S t u d Nuts (Lower) 50