Rear Extension Housing Replacement

Removal Procedure





1. Raise the vehicle. Refer to Vehicle Lifting.
2. Remove the rear propeller shaft.
3. Remove the four bolts that secure the rear extension housing to the rear retainer housing.
Remove the rear extension housing from the rear retainer housing.
Tap the extension housing with a rubber mallet in order to free the rear retainer housing.





4. Remove the rear bearing retainer snap ring.
5. Remove the five bolts securing the rear retainer housing to the transfer case.
6. Remove the rear retainer housing.
7. Remove the seal. Use a screwdriver. Do not damage the sealing bore.
8. Clean the gasket surfaces with a suitable solvent.


Installation Procedure

^ Tools Required
- J 29162 Rear Output Shaft Seal Installer.

1. Install the rear retainer housing.
^ Make sure the gasket surfaces are clean and free of grease and oil.
^ Apply the RTV sealer GM P/N 12345739 to the rear retainer housing sealing surfaces.

Notice: Refer to Fastener Notice in Service Precautions.

2. Secure the rear retainer housing to the transfer case with the five bolts.
^ Tighten the rear retainer housing bolts to 40 Nm (30 ft. lbs.).
3. Install the snap ring.
4. Install the rear extension housing to the transfer case.
^ Clean the gasket surfaces thoroughly.
^ Apply RTV sealer GM P/N 12345739 to the rear extension housing sealing surfaces.
5. Install the four bolts that secure the rear extension housing to the rear retainer housing.
^ Tighten the rear extension housing bolts to 31 Nm (23 ft. lbs.).
6. Install the seal.
^ Lubricate the seal lips with transmission oil or with petroleum jelly.
^ Install the seal using the J 29162.
7. Install the rear propeller shaft.
8. Check the transfer case oil level. Add oil if necessary.
9. Lower the vehicle.