Installation Guide for the JK Wrangler 3-Inch spring lift

Installation Guide for the JK Wrangler 3-Inch spring lift
Tera Manufacturing, Inc.
5251 South Commerce Dr.
Murray, Utah 84107
Installation Guide for the JK
Wrangler 3-Inch spring lift
Read the entire installation guide before beginning installation. These instructions apply to the
following kit part numbers
3-Inch JK spring lift with shocks
3-inch JK spring lift without shocks
Attention: Driveshaft modification may be
required following installation of any suspension
lift on the JK Wrangler. Read the notes at the
end of this installation guide for more information.
Kit includes:
Keep this a safe operation by properly
New 3-inch coil springs
supporting the vehicle during installaFront sway bar link kit
tion of the TeraFlex suspension lift kit.
Rear sway bar links
Shock absorbers (Depending on kit)
Front upper bump stop extensions
Rear lower bump stops
Front spring spacers
Rear spring spacer/guides
Rear trackbar bracket
Rear brake line extension brackets
Front brake lines
Rear coil spring retainers
Hardware kit
Lift the vehicle and support under the
frame so that the axles will be able to
drop down far enough to remove and
replace the coil springs.
Remove the tires.
Support the rear axle and remove the rear
Remove the rear sway bar links.
Remove the clips that secure the ABS
wiring harness to the upper control arm
Unbolt the rear brake line bracket at the
frame but do not disconnect the brake
lines from the calipers.
Remove the bracket that holds the park
brake cables to the body.
Unbolt the frame end of the rear track
bar. Set aside bolts for later use.
9. Carefully lower the rear axle far enough
to remove the rear coils. Hold on to
the coils so they don’t just fall out as
you lower the axle. Note: It may be
necessary to loosen the control arm
mounting bolts to allow the axle to drop
down. Do not remove the bolts or the
rear control arms!
10. After removing the stock springs allow
the axle to drop a little bit more to
make room to install the new 3-inch
rear coil springs. Watch the axle
breather hose, the brake lines and
ABS wiring to make sure they are not
supporting the weight of the rear axle.
11. Before installing the new rear springs,
install the rear coil spring guide and
spacer by pushing it into the hole in
the frame directly above the rear coil
spring. Putting some grease on the top
spacer button will help the spacer pop
into place.
Revised 28 Jan 2008
12. If you plan
to carry a lot
of weight in
the rear of
the vehicle,
reinstall the
factory spring
isolator onto
the TeraFlex
spring spacer/guide, otherwise leave it off. Note:
The factory spring isolator can be added in later if you
add a full size spare tire or if for any other reason you
want to slightly raise the back of the vehicle.
13. Feed the top of the coil into place over the
spring guide and lift the bottom of the coil up
onto the axle spring guide post.
14. With the springs in place raise the rear axle a
bit to take any load off the brake hoses and ABS
15. Install the rear shocks at the frame end, then
raise the rear axle far enough to install the lower
end of the shock to the axle bracket, then let
the axle hang on the shocks.
16. Install the lower bump stop onto the axle pad
with the 5/16 x 1.25 bolts, washers and nuts
provided in the hardware kit.
Note: Make sure the
location is
the same as
with the extra
lip facing the
front of the
17. To install the rear coil spring retainers on the
bottom end of the coil springs first insert the
flanged nut into the provided wrench tool, as
shown below, and put the nut under the spring
Insert the bolt, with the lockwasher on top of
the flat plate, into the rear lower spring retainer,
holding the flanged nut in place using the
provided wrench tool and begin tightening the
bolt. Remove the tool when finished.
Driver’s Side
18. Install the new longer rear sway bar links on the
inside of the sway bar and axle brackets with special
care when placing the bolts to avoid rubbing on the
frame or tire sidewall.
19. Install the rear trackbar bracket on the axle.
Note: See
for the
rear trackbar
on the last
20. Raise the rear axle far enough to connect the track
bar to the new bracket, using the factory bolt and
21. Reinstall the axle breather hose if it was removed
during disassembly.
22. Relocate the rear brake lines using the drop
brackets provided in the kit. See attached additional
information page for proper location.
23. Rear installation is now complete.
24. Remove the front skid plate that goes under the
transmission. Leave the transfer case crossmember
bracket in place.
25. Support the front axle and remove the front shocks.
Revised 28 Jan 2008
26. Loosen but don’t remove the front track bar bolts.
27. Loosen the front control arm mounting bolts but do
not remove them or the control arms. Disconnect from
swaybar links.
28. Carefully remove the clips that hold the ABS wires in
place as needed so they are not damaged as you lower
the axle assembly. It may be necessary to disconnect
the ABS wires at the connector behind the spring
tower to get enough slack to lower the front axle.
Use extreme care to not damage the ABS wiring as
this is an integral part of the vehicle control system.
Carefully lower the front axle and remove the stock
coil springs.
29. Replace the front brake hoses with the new longer
hoses provided in the kit.
30. Remove the factory upper bump stop from the cup on
the bottom of the coil tower.
31. Remove the front upper spring isolator.
32. Install the new front spring spacer.
33. Reinstall the factory spring isolator below the new
TeraFlex spring spacer.
34. Install the new upper bump stop extension by putting
some grease on the upper part of the spacer and
popping it into the bump stop cup.
35. Insert the factory bump stop into the bottom of the
new bump stop extension.
36. Install the new front springs. Using a coil spring
compressor can make this easier.
37. Install the new front shocks.
38. Install the front sway bar quick disconnect links.
Note: see attached
additional information
Note: On JK models with the factory disconnect front sway
bar it is not necessary to install the QD brackets and
pins on the front body mounts, all other models install
the brackets and pins where the sway bar links will be
parked when disconnected, as shown in the photo.
39. Bleed the brakes being careful to keep fluid in the
master cylinder at all times.
40. Reinstall the factory tires or new aftermarket tires
and wheels and torque all the lug nuts.
41. Lower the vehicle to the ground.
42. With the vehicle sitting on the ground torque all
the control arm mounting bolts and the track bar
mounting bolts.
43. Secure the brake hoses and ABS wiring so they will
not be damaged during vehicle operation.
44. Have the vehicle alignment checked and adjusted
by a shop that is familiar with proper alignment
settings on a lifted vehicle.
Note: Caster should be set at 5 degrees. The passenger
side may need to be turned 1/4 to 1/2 a degree more
to avoid pulling to the right while driving.
Revised 28 Jan 2008
Driveshaft Notes:
The design of the factory driveshafts is great for highway use and mild off road use, but may not survive the rock contacts
and stresses of moderate to extreme off-road use once the vehicle is lifted 3 inches or more. TeraFlex driveshafts and yokes are
available separately.
front driveshaft - all
rear driveshaft - automatic 2door
rear driveshaft - automatic 4door
Part# 4743200
Part# 4744200
Part# 4744400
Note on tire and wheel selection:
The JK Wrangler uses a larger brake system than on the previous TJ Wrangler so the minimum wheel size is
16 inches. Aftermarket wheels should be selected that are at least 16 inches in diameter with a 5 on 5-inch
lug bolt pattern and 4.5 inch backspacing. The factory wheels use a 6 inch backspacing, but when installing
larger tires on the factory wheels some rubbing of the tire on the sway bar and control arms may occur.
TeraFlex offers both wheel offset adapters and wheel lug pattern adapters that are 1.250 inches thick. The
offset adapters are for running factory wheels with aftermarket tires. The adapters allow use of a wheel with
either a 5 on 4.5 lug pattern or 5 on 5.5 lug pattern on the JK Wrangler bolt pattern of 5 on 5 inches. Contact
your local TeraFlex distributor for more information.
Tires from various manufacturers vary in actual dimension, but as a general guideline TeraFlex recommends a
maximum tire diamter of 35 inches mounted on a 8 inch wide rim for use after installing the JK 3 inch spring
lift kit. Other tire and wheel combinations may also work, but the installer takes responsibility for ensuring a
proper selection of tire and wheel.
The 2007 JK Wrangler uses 1/2- inch by 20 (UNF) wheel studs.
Revised 28 Jan 2008
Additional Information: JK Wrangler
The rear brake line lowering brackets (3-inch kit
only. The 4-inch kit includes extended brake
and L-Tabs to mount the lines to the frame)
are bent in order to allow additional clearance
between the brake line and the rear factory sway
bar. Be sure to install the left and right brackets
so the brake line is moved in away from the sway
bar. The locating tab should be located in the
slot on the bracket.
Front Sway Bar Disconnects:
The front sway bar link supplied in your kit may
be either a fixed link or an adjustable link. The
adjustable link must be set to length and the
jam nuts tightened.
Remove the factory sway bar link. Insert the
sleeve into the upper bushing. Put the flat
washer on the bolt, then the bolt through the
sleeve and then through the sway bar. Install
the stover nut and tighten.
The lower pin mounts through the factory link
mount on the axle, then slide the sway bar link
into place, install the large diameter flat washer
and the retaining clip.
The angle bracket that is part of the sway bar link hardware can be
installed under the body mount to provide a “park” location for the
sway bar link when it is disconnected for off-road use. The angle
bracket is assembled by putting the threaded end of the smaller pin
through the small hole of the bracket and installing the jam nut.
Then remove the factory body mount nut and install the bracket on
to the body mount stud reusing the original nut. This pin is used to
“park” the sway bar link when the link is disconnected.
Revised 28 Jan 2008
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