GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 25070 Heat Gun


    Object Number: 1831655  Size: SH
  1. Install the rear case shift shaft bushing.

  2. Object Number: 4848  Size: SH
  3. If 4WD vehicle, install the main shaft rear bearing in the rear case.

  4. Object Number: 4847  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. If 4WD vehicle, install the main shaft bearing retainer and the bolts.
  6. Tighten
    Tighten the main shaft bearing retainer bolts to 22 N·m (16 lb in).


    Object Number: 4751  Size: SH
  7. Using the J 25070 heat the rear housing countershaft bearing bore for 10 minutes.
  8. Install the countershaft bearing race using a suitable bearing installer.