GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 6116-A Rear Gear Holding Fixture
    • J 21364-A Rear Gear Holding Fixture Adapter
    • J 38868 Lower Gear Unit Assembly Remover/Installer
    • J 6129 Handle

    Object Number: 28408  Size: SH

    Important:: Discard the center support bolt (25) after you have removed the bolt. Damage could result to the center support housing if you reuse the bolt.

  1. Remove the center support bolt (25).

  2. Object Number: 54546  Size: SH
  3. Remove the rear oil cooler pipe fitting (90).
  4. Inspect the rear oil cooler pipe fitting (90) for damaged threads.
  5. Inspect the rear oil cooler pipe fitting seal (91) for nicks or cuts.

  6. Object Number: 28409  Size: SH
  7. Remove the center support retaining ring (633).

  8. Object Number: 28410  Size: SH
  9. Attach the J 38868 to the transmission main shaft.
  10. Tighten the thumb screw on the J 38868 .
  11. Install the J 6129 to the J 38868 .
  12. Turn the J 6129 so that the shaft contacts the main shaft.
  13. Remove the center support and gear unit assembly (640-672) by lifting the J 38868 with the J 6129 .
  14. Remove the J 6129 and the J 38868 .

  15. Object Number: 28411  Size: SH
  16. Place the center support and gear unit assembly (640-672) into the J 21364-A (not visible in the illustration) and then into the J 6116-A .