GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • 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 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

    Important: 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. Notice: Refer to Fastener Notice in the Preface section.

  8. While holding J 45012 , install a NEW drive flange nut using J 29873 .
  9. Tighten
    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 Propeller Shaft Replacement .
  13. Lower the vehicle.