Transmission Case and Adapter Assemble

Transmission Case and Adapter Assemble

Transmission Case

Tools Required
* J 8092 Universal Driver Handle
* J 36190 Universal Driver Handle
* J 39435 Bearing Race Installer
* J 39439-4 Bushing Installer
* J 39439-3 Bushing Installer




1. Install the lst/2nd and the 3rd/4th shift shaft bushings. Use the J 36190, the J 39439-4, and the J 39439-3.




2. Install the mainshaft bearing race, using the J 8092 and the J 39435.




3. Install the countershaft bearing race, using the J 8092 and the J 39435.




4. Install the dowel pins.




5. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the reverse lamp switch.





Notice: Refer to Fastener Notice.

6. Install the reverse lamp switch.

Tighten the switch to 27 N.m (20 lb ft).

7. Install the coolant temperature sensor (MY6 only).

Tighten the sensor to 39 N.m (29 lb ft).




8. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the transmission case fill plug, MM6 only.




9. Install the transmission case fill plug (1), MM6 only.

Tighten the transmission case fill plug to 18 N.m (13 lb ft).





Notice: The H-pattern on the guide plate must face the extension housing. If the guide plate is installed incorrectly, then damage will occur.

10. Install the guide plate and the guide plate bolts.

Tighten the bolts to 22 N.m (16 lb ft).

Adapter Plate

Tools Required
* J 39433 Input Shaft Seal Installer
* J 39439-1 Shift Rail Bushing Remover/lnstaller
* J 42464 Shift Shaft Seal lnstaller
* J 42496 Inner Shift Rail Inner Seal lnstaller




1. Install the dowel pins.





Notice: If the 1st/2nd, 3rd/4th speed shift shaft bushing is installed incorrectly it will interfere with the inner shift rail seal causing a leak.

2. Install the 1st/2nd, 3rd/4th speed shift shaft bushing flush with adapter plate, using the J 39439-1.




3. Install the inner shift rail seal (1) using the J 42496. Garter spring should face inside of transmission.
4. Install the outer shift rail seal (2) using the J 42464.




5. Install the input shaft seal, using the J 39433.




6. Install the countershaft bearing shim and bearing race.




7. Install the input shaft bearing shim and bearing race.