12. Transmission Case and Adapter Assemble

Transmission Case and Adapter Assemble

Special Tools
* J 8092 - Universal Driver Handle
* J 36017 - Valve Seal Remover
* J 36190 - Universal Driver Handle
* J 39433 - Input Shaft Seal Installer
* J 39435 - Bearing Race Installer
* J 39439-3 - Bushing Installer
* J 39442 - Mainshaft and Countershaft Press Adapter
* J 42464 - Shift Shaft Seal Installer
* J 42496 - Inner Shift Rail Inner Seal Installer

For equivalent regional tools, refer to Special Tools (Special Tools and Equipment).

Transmission Case




1. Install the 1st/2nd and the 3rd/4th shift shaft bushings. Use J 36190 - driver handle and J 39439-3 - bushing installer.




2. Install the mainshaft bearing race, using the J 8092 - universal driver handle and the J 39435 - race installer.




3. Install the countershaft bearing race, using the J 8092 - universal driver handle and the J 39435 - race installer.




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.





Caution: Refer to Fastener Caution (Fastener Caution).

6. Install the reverse lamp switch and tighten to 27 Nm (20 lb ft).
7. Install the coolant temperature sensor and tighten to 39 Nm (29 lb ft).




8. Install the transmission case cooler line return fitting.





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

9. Install the guide plate and the guide plate bolts and tighten to 22 Nm (16 Lb ft).

Adapter Plate




1. Install the check ball (3).
2. Install the spring (2).
3. Install the plug (1).




4. Install the oil pump (3).
5. Install the oil pump cover assembly (2).
6. Install the retainer ring (1).




7. Install the dowel pins.





Caution: 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.

8. Install the 1st/2nd, 3rd/4th speed shift shaft bushing flush with adapter plate, using the J 39439-3 - bushing installer (2) and J 36190 - universal driver handle (1).




9. Load the inner seal (1) and the outer seal (2) onto J 42496 - seal installer.
10. Install the shift rail seal (1 and 2) using J 42496 - seal installer.




11. Install the input shaft seal, using the J 39433 - shaft seal installer.




12. Install the countershaft bearing shim and bearing race. Refer to Input Shaft, Mainshaft and Countershaft in Shimming Procedures (21. Shimming Procedures).




13. Install the input shaft bearing shim and bearing race. Refer to Input Shaft, Mainshaft and Countershaft in Shimming Procedures (21. Shimming Procedures).




14. Install the adapter plate pump plug (3).
15. Install the pump outlet cooler fitting seal (2) and fitting (1).




16. Attach J 36017 - seal remover within the groove at the base of the oil filter assembly. Slide the collar of the tool down to grasp the oil filter assembly.
17. Place the oil filter assembly with J 36017 - seal remover (2) attached onto the adapter plate.
18. Using J 39442 - press adapter (1), tap the oil filter assembly into place with a hammer. Remove J 36017 - seal remover (2).