Advance Adapters New Venture 4WD Model 4500 5 Speed GM NP205 1971-1979 27 Spline Adapter Instructions

ADVANCE ADAPTERS INC.
P/N: 50-0218
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
Telephone: (800) 350-2223
Fax: (805) 238-4201
New Item: (07/95)
PAGE 1 OF 4
Page Rev. Date: 04-26-10
NEW VENTURE 4WD MODEL 4500 5 SPEED
TO GM NP205 1971-1979 27 SPLINE
KIT CONSISTS OF:
No.
Qty
Part No.
Description
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
1
1
1
1
1
1
1
1
8
8
6
2
1
51-0217
51-0216
52-0218
715529
716056
716301
716462
716703
720028
723730
723740
723723
NV001
ADAPTER HOUSING 6.3" LG (Modified 51-0205)
ADAPTER PLATE
COUPLER
T/C LINKAGE BRACKET
STEEL TUBING CROSSMEMBER
SEALED BEARING
2-PIECE SET COLLAR
SEAL (NATIONAL #415259)
S.H.C.S. 10mm x 1.5 - 35mm LONG
S.H.C.S. 3/8"-16 x 1-1/4"
S.H.C.S. 3/8"-16 x 1-1/2"
3/8"-16 x 1-1/2" H.H.C.S. (CROSSMEMBER MOUNT)
NEW VENTURE INSTRUCTION MANUAL
NOTES
1. This adapter is designed for exclusive use of the 4WD GM version New Venture Model 4500 transmission. You must
use this transmission due to the spline area where the GM harmonic balancer is located. The shaft must be shortened
to 4.498" long which will be directly behind the 31 spline area. In order to cut off the shaft, you will need to remove
the tailhousing. The shaft can be cut off using an abrasive cut off saw or a skill saw equipped with a special metal
cutting blade. Be sure to use safety glasses during this procedure. You must remove the harmonic balancer and install
the 2 piece set collar. CAUTION: Make sure that the output shaft of the NV4500 does not interfere with the input
shaft of the NP205 transfer case. It may be necessary to grind the end of the shaft for necessary clearance. The
coupler must be trapped and limited to a minimum lateral travel.
2. Install the new sealed bearing into the front of the NP205 transfer case and install the oil seal into the adapter housing.
This will prevent the transfer of oil between the two gear boxes. You will also be required to use some RTV blue
silicone on the splines of the transfer case side of our coupler. Unless this is done, the coupler shaft we manufacture
will allow fluid to transfer down the splines into the transfer case. ONLY Apply silicone to the inside of our coupler
and to the transfer case side of our coupler. As you slip the coupler over the splines, the silicone will fill the voids
on the splines. We also recommend that you take the excess silicone that should have squeeze inward towards the
center of the coupler and smooth it out with your finger. This will seal the splines to avoid oil transfer. Let the silicone
dry for 6 hours before installing the transmission to minimize the chance of silicone getting into the NV4500
tailhousing.
3. Bolt the new larger tailhousing to the back of the transmission. Make sure all of the gears clear the new housing and
the dowel pins are installed. Assemble the plate to the transfer case.
SPECIAL NOTE:
The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the components
will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion, we strongly
recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter components. We
recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment. These manuals are normally
available at automotive dealerships and parts stores.
ADVANCE ADAPTERS INC.
P/N: 50-0218
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
Telephone: (800) 350-2223
Fax: (805) 238-4201
New Item: (7/95)
PAGE 2 OF 4
Page Rev. Date: 04-04-02
NEW VENTURE 4WD MODEL 4500 5 SPEED
TO GM NP205 1971-1979 27 SPLINE
4. The bolt pattern on the front side of the New Venture gear box is unique to only late model GM transmissions. The
original GM bellhousing provides a slave cylinder on the passenger side of the vehicle that will interfere with the early
GM front driveshaft. We have a new aluminum bellhousing that will have this bolt pattern provided for all Chevy V8
conversions.
5. The NP205 transfer case must be equipped with a 27 tooth male input spline as illustrated. This shaft is common
to all GM NP205 transfer cases used with the automatic TH350 transmission.
SPECIAL NOTE:
The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the components
will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion, we strongly
recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter components. We
recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment. These manuals are normally
available at automotive dealerships and parts stores.
ADVANCE ADAPTERS INC.
P/N: 50-0218
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
Telephone: (800) 350-2223
Fax: (805) 238-4201
New Item: (07/95)
PAGE 3 OF 4
Page Rev. Date: 02-08-12
NEW VENTURE 4WD MODEL 4500 5 SPEED
TO GM NP205 1971-1979 27 SPLINE
Transmission Lubrication
The NV4500 transmission uses approximately one gallon of synthetic oil. This oil is available at your local
GM authorized dealer under Part No. 12346191 (gallon), or Part No. 12346190 (quart). Unlike regular
petroleum oil that breaks down when it gets too hot, this synthetic oil is made up of different properties that
do not break down. Amsoil MFT is about the only oil that is designed to work in the NV4500 transmissions
that is not supplied from GM. DO NOT SUBSTITUTE any other lubricant as internal damage may occur.
One of the biggest problems encountered is that people substitute different transmission fluids for use with
this transmission.
We offer the NV4500 oil under our part number 715690.
CAUTION!
IN ORDER TO LOCK MAIN SHAFT IN POSITION, THE SET COLLAR MUST BE INSTALLED ON THE
REAR SIDE OF THE OUTPUT SHAFT MAIN BEARING.
SPECIAL NOTE:
The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the components
will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion, we strongly
recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter components. We
recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment. These manuals are normally
available at automotive dealerships and parts stores.
ADVANCE ADAPTERS INC.
P/N: 50-0218
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
Telephone: (800) 350-2223
Fax: (805) 238-4201
New Item: (4/94)
PAGE 4 OF 4
Page Rev. Date: 02-08-02
NP 205 transfer case with adapter in position.
Side view of the transfer case and adapter.
Tailhousing notched.
New coupler for 31 spline.
Output shaft shortened - 31 tooth.
Transmission ready to fit transfer case.