Advance Adapters 50-8500 - Manual (Page 2)

GM TH350 AUTOMATIC TO
GM NEW PROCESS 207 S10-S15 4WD
ADVANCE ADAPTERS INC. P/N: 50-8500
P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711085
Paso Robles, CA 93447 PAGE 2 OF 2
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 08-03-04
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.
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 has 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 these transmissions
have been furnished with and you must make sure the proper shaft has been installed into the transmission for use with
our transfer case kit. All TH350 output shafts will have 27 splines. 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 on the bottom of the original S10 adapter.
When installing the new transfer case adapter make sure that the transfer case input and the transmission output shaft do
not bottom out. DO NOT FORCE THE TRANSFER CASE ONTO THE TRANSMISSION. If assistance is needed,
please feel free to call the number listed above.
When assembling the adapter housing to the transmission case and original adapter we have provided you with 2 new
square-type "O"-ring seals 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 Adapter
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 some times the
existing column shift can be modified on certain applications.
This adapter must be used in conjunction with the original GM adapter housing and transfer case linkage control bracket.
You will need to purchase these items from your local Chevy dealer if your vehicle was previously equipped with a manual
transmission.