GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 6125-1B Slide Hammer
    • J 23129 Universal Seal Remover
    • J 29873 Injector Nozzle Socket 30 mm
    • J 44765 Seal Installer
    • J 45012 Holding Fixture
    • J 45019 Flange and Pinion Gage Remover

Removal Procedure


    Object Number: 1236100  Size: SH
  1. Place the transmission in neutral.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the propeller shaft (6). Refer to Rear Propeller Shaft Replacement.

  4. Object Number: 804354  Size: SH
  5. Install the J 45012 to the drive flange.
  6. While holding the J 45012 , remove the flange nut using the J 29873 .
  7. Remove the J 45012 .

  8. Object Number: 1430041  Size: SH
  9. Remove the drive flange thrust washer.
  10. Remove the drive flange using the J 45019 .

  11. Object Number: 794669  Size: SH
  12. Use the J 6125-1B and J 23129 to remove the transmission case extension seal (1).

Installation Procedure


    Object Number: 794670  Size: SH

    Note: Install the seal onto the tool before installing into the case to prevent damage to the seal.

  1. Using J 44765 install the new transmission case extension seal (1).

  2. Object Number: 1430041  Size: SH
  3. Install the drive flange to the transmission output shaft.
  4. Install a NEW drive flange thrust washer.

  5. Object Number: 804354  Size: SH
  6. Install the J 45012 to the drive flange.
  7. Caution: Refer to Fastener Caution in the Preface section.

  8. While holding J 45012 , install a NEW drive flange nut using J 29873 .
  9. Tighten the drive flange nut to 57 N·m (42 lb ft).

  10. Remove the J 45012 from the drive flange.

  11. Object Number: 1236100  Size: SH
  12. Install the propeller shaft (6). Refer to Rear Propeller Shaft Replacement.
  13. Lower the vehicle.