Advance Adapters AX15 User Manual

Page 38

GM NP205 (27 spline T/C) to GM 4WD NV4500 replacing a TH350:

This package is for a

GM 4WD NV4500

to the GM NP205 (1971-79), replacing the TH350 transmission. This application requires

the shortening of the NV output shaft to 4.498” in length. When using this kit, we couple to the 31 spline area which is under the
harmonic balancer. In order to cut the shaft, you will need to remove the tailhousing. The NP205 has a 27 spline male shaft. We
manufacture a female coupler that engages the 31 spline transmission to the 27 spline transfer case. We have included a new
seal for the adapter housing along with a new sealed bearing for the transfer case for extra protection. The transfer case adapter
kit uses two castings to coupling the NV4500 to the NP205. These castings have been machined to allow for proper transfer case
shift rail clearance. A shifter bracket has been provided to mount the stock NP205 shifter handle; however, you may be required
to modify the handle to properly fit up into the cab of the truck.

The bellhousing in this kit bolts directly to the front of the NV4500. Since this vehicle was
originally equipped with an automatic transmission, we’ve supplied a slave cylinder bracket
for your clutch linkage

(P/N 715535)

. This bracket is designed to fit 1985-1991 GM slave

cylinders (GM #15615868). A hydraulic clutch system is much easier to install than a
mechanical linkage. If you decide to install a mechanical linkage, you can substitute for
bracket

P/N 715534

The recommended clutch components for the bellhousing are found

in the GM Full Conversion Bellhousing section of this manual.

The overall assembled length is

26.750”

P/N 27-0031

GM 4WD NV4500 to GM

27 spline

NP205 transmission assembly

P/N 712576

Bellhousing kit for GM NV4500 (1996 & newer)

P/N 50-0218

Transfer case adapter

P/N 715535

Clutch linkage bracket

P/N 715529

T/C linkage bracket

(supplied in 50-0218)

P/N 716050C

Shifter handle assembly

If you have a 1995 & earlier GM NV4500, this bellhousing kit can be substituted with

P/N 712577

GM NP205 (32 spline T/C figure-8 bolt pattern) to GM 4WD NV4500:

If you’re attempting to build an unbreakable drivetrain, then the ultimate connection of a

GM 4WD NV4500

to a 1971-85 NP205

(replacing the SM465 or TH350) must be considered. The adapter was engineered for heavy-duty truck applications. This
installation uses the largest spline size available (the factory 32 spline GM NV4500 output shaft), and offers the maximum strength
of any of the NP205 conversions. The kit requires the purchase and installation of a new 32 spline input gear and bearing

(Part

No. 716038)

. The new input bearing is approximately 1/4" larger in diameter than the stock bearing. Some machining on the

transfer case is required in order to accept the larger bearing and new input gear.

This kit also is designed for the 1979 to 1985 1-ton truck with a TH400 transmission. This particular

transfer case is already equipped with the proper input gear and bearing, so no machining is required.

The kit utilizes the stock 32 spline GM 4WD NV4500 output shaft. This shaft must be shortened to a
stickout length of 7.625". With the output shaft shortened and the adapters installed, you will find the

assembled length to be approximately 19-1/4". The new adapter uses a seal in the adapter housing

and a sealed bearing in the transfer case, which is required to isolate the different fluids. The transfer

case adapter kit uses two castings to couple the NV4500 to the NP205. These castings have been

machined to allow for proper transfer case shift rail clearance. A shifter bracket has been provided to
mount the stock NP205 shifter handle; however; you may be required to modify the handle to properly

fit up into the cab of the truck.

The bellhousing in this kit bolts directly to the front of the NV4500. Since this kit was developed primarily for vehicles originally
equipped with the TH400 automatic transmission, we’ve supplied a slave cylinder bracket for your clutch linkage

(P/N 715535)

This bracket is designed to fit 1985-1991 GM slave cylinders (GM #15615868). A hydraulic clutch system is much easier to
install than a mechanical linkage. If you decide to install a mechanical linkage, you can substitute for bracket

P/N 715534

The

recommended clutch components for the bellhousings listed above are found in the GM Full Conversion Bellhousing section of
this manual.

On pre-1997 transmissions, you must remove the harmonic balancer and install a 2-piece set collar.

P/N 27-0032

GM 4WD NV4500 to GM

32 spline

NP205 transfer case

(Figure-8 bolt pattern)

(Machining is required on the transfer case)