13. Trans Case and Adapter Plate Assemble

Trans Case and Adapter Plate Assemble (Y Car)

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 1st/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 United States 12346004, GM P/N Canada 10953480 or equivalent to the threads of the reverse lamp switch.

Notice: Refer to Fastener Notice in Service Precautions.





6. Install the reverse lamp switch.
^ Tighten the switch to 27 Nm (20 ft. lbs.).





7. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480 or equivalent to the threads of the transmission case fill plug (1), MM6 only.
8. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480 or equivalent to the threads of the temperature switch, M12 only.





9. Install the transmission case fill plug (1), MM6 only.
^ Tighten the transmission case fill plug to 18 Nm (13 ft. lbs.).
10. Install the temperature switch (2), M12 only.
^ Tighten the temperature switch to 41 Nm (30 ft. lbs.).

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





11. Install the guide plate and the guide plate bolts.
^ Tighten the bolts to 22 Nm (16 ft. lbs.).

Adapter Plate

^ Tools Required
- J 39433 Input Shaft Seal Installer
- J39439-1 Shift Rail Bushing Remover/Installer
- J 42464 Shift Shaft Seal Installer
- J 42496 Inner Shift Rail Inner Seal Installer





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 J42496 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.





8. Install the neutral return cam spring.
9. Install the neutral return cam spring retaining bolt and washer.
10. Install the neutral return cam.
^ Tighten the bolt to 25 Nm (18 ft. lbs.).