13. Trans Case and Adapter Plate Assemble

Transmission Case

^ Tools Required
^ J 8092 Universal Drive Handle
^ J 36190 Drive Handle
^ J 39435 Mainshaft and Countershaft 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.

Notice: Refer to Fastener Notice in Service Precautions.








5. Apply sealant GM P/N 12346004 or equivalent to the threads of the reverse lamp switch and install the backup lamp switch.
^ Tighten the switch to 27 Nm (20 ft. lbs.).





6. Apply sealant GM P/N 12346004 or equivalent, to the threads of the oil fill plug or Temperature Switch.





7. Install the oil fill plug or Temperature Switch.
^ Tighten the oil fill plug to 18 Nm (13 ft. lbs.).
Tighten 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.





8. 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
^ J 39439-1 Bushing Installer
^ J 42464 Shift Rail Outer Seal Installer
^ J 42496 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 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. Refer to Input Shaft, Mainshaft and Countershaft.





7. Install the input shaft bearing shim and bearing race. Refer to Input Shaft, Mainshaft and Countershaft.





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.).