Rear Case, Rear Case Oil Seal and Rear Case Countershaft Plug

REMOVE OR DISCONNECT
^ Tools Required:
- J 29369-1 Output Shaft Bearing Remover
- J 23907 Slide Hammer
- J 35664 Bearing Installer

1. Gearshift lever case from transmission.
2. Transfer case from vehicle.
3. Twelve bolts and rear case from transmission.





4. Rear case oil seal from the rear case using a J 29369-1 with a J 23907.





5. Rear case countershaft plug from the rear case using a J 35664 and a hammer.

Clean
1. Rear case and transmission mating surfaces.
2. Gearshift lever case and rear case mating surfaces.

Inspect
- Rear case for cracks or porosity. If cracks or porosity exist, replace rear case.

INSTALL OR CONNECT
^ Tools Required:
- J 37758 Countershaft Rear Plug Installer
- J 8092 Driver Handle
- J 37750 Oil Seal Installer
- J 36850 Transaxle Transmission Assembly





1. Rear case countershaft plug into the rear case using a J 37758 with a J 8092 and a hammer.





2. New rear case oil seal into the rear case using a J 37750 and a hammer.
3. Apply J 36850 to the new rear case oil seal lip.
4. Apply GM P/N 12346240, or equivalent, to the transmission rear case mating surface.
5. Rear case to transmission; secure with twelve bolts.
- Tighten rear case bolts to 28 Nm (20 ft. lbs.).
6. Transfer case into vehicle.
7. Gearshift lever case to transmission.
8. Add approximately 1.5 liters (1.6 qts.) of 75W-90 GL4 lubricant or equivalent, into the transmission oil level filler plug hole. Oil level should be even with the bottom of the transmission oil level filler plug hole.
9. Apply GM PIN 12346004, or equivalent, to the threaded portion of the transmission oil level/filler plug.





10. Transmission oil level/filler plug into transmission.
- Tighten transmission oil level/filler plug to 28 Nm (20 ft. lbs.).