Advance Adapters 50-3700 User Manual

ADVANCE ADAPTERS INC. P/N: 50-3700

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711037
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev . Date: 12-17-02

TH350 TO TOYOTA 4WD 23T INPUT

1987 & UP T OYOTA TRUCK 4WD VEHICLES

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-3700 ADAPTER CASTING (Ref: 711137)

2. 1 52-3700 SPECIAL TH350 OUTPUT SHAFT (Ref: 711337)

3. 1 716062 NYLON BUSHING FOR T350 OUTPUT SHAFT (CUSTOMER MUST INSTALL)

4. 1 716511 O~RING (GM# 135-8899)

5. 1 716741 SEAL (NAT# 450065) (INSTALLED IN CASTING)

6. 4 723728 S.H.C.S. 3/8"-16 X 2-1/4"

7. 1 TT001 TOYOTA TRUCK INSTRUCTION MANUAL

INSTRUCTIONS:

Before assembling the transmission with the new output shaft, you should verify that you have received the correct
adapter for your application. This adapter fits Toyota 4WD trucks that were manufactured after November 1987, and
were normally equipped with the Toyota V6 engine. There are two different output shafts available. There is a 23
spline and a 26 spline. We have no way of identifying the spline size prior to disassembly of your transmission and
transfer case. It will be the customer's responsibility to determine the correct spline size.

There are 2 special dowel pins that locate the transfer case to the new Advance Adapter housing. The assembled
overall length will be slightly longer than the original transmission

conversions

transfer case support.

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.

. The crossmember will need to be relocated or a new support bracket welded to the back side of the original

and driveline modifications will be required on V8

ADVANCE ADAPTERS INC. P/N: 50-3700

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711037
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev . Date: 08-23-94

TH350 TO T OYOTA 4WD T/C MODEL NO. VF1A

1987 & UP T OYOTA TRUCK 4WD VEHICLES

GM TH350 3 SPEED AUTOMATIC

The General Motors TH350 has a case length of 21-1/2", 13 bolts for holding the oil pan in position and is available in
two different engine to transmission bolt patterns. The case is available with a Chevy bolt pattern that has the top two
holes 8-1/4" apart or in a Buick bolt pattern that have the top two holes 7" apart. The rear side of the transmission case
should have a square bolt pattern that uses 4 bolts. There are several various lengths of output shafts that the
transmission have been furnished with and you must make sure the proper shaft has been installed into the transmission
for use with the Advance Adapter transfer case kit. The speedometer gear is normally located in the tailhousing, but
when adapting it to the transfer case, the location will change to the back side of the transfer case. The rear transmission
support is located in the main case just forward of the tailhousing connection. This can be used for supporting the
crossmember on some installations, but most of our kits provide support on the new adapter housing.

When installing the new transfer case adapter, make sure that the coupler and the output shaft do not bottom out.
When assembling the adapter housing to the transmission case, we have provided you with a new square-type "O" ring

seal to prevent fluid leakage. This seal is a stock GM item that is used on all TH350 installations.
If you have selected a transmission that has the old style modulator, then we recommend the use of the Advance

Adapters adjustable modulator, Part No. 716010. This will also allow for additional driveshaft clearance.
All installations will require the use of a transmission cooler. The cooler can be either installed in the radiator or a remote

location is acceptable. The transmission shift control can either be a Hurst floor mounted type shifter or sometimes the
existing column shift can be modified on certain applications.

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.