GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 6116-A Rear Gear Holding Fixture
    • J 6129 Handle
    • J 21364-A Rear Gear Holding Fixture Adapter
    • J 38868 Output Shaft Assembly Remover and Installer

For equivalent regional tools, refer to Special Tools.


    Object Number: 28408  Size: SH

    Caution: 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: 2156031  Size: SH
  3. Remove the rear fluid cooler pipe fitting (90), if equipped.
  4. Inspect the rear fluid cooler pipe fitting (90) for damaged threads.
  5. Inspect the rear fluid cooler pipe fitting seal (91) for nicks or cuts.

  6. Object Number: 334766  Size: SH
  7. Remove the center support retainer ring (633).

  8. Object Number: 334768  Size: SH
  9. Attach the J 38868 remover and installer to the transmission main shaft.
  10. Tighten the thumb screw on the J 38868 remover and installer .
  11. Install the J 6129 handle to the J 38868 remover and installer .
  12. Turn the J 6129 handle so that the handle shaft contacts the transmission main shaft.
  13. Remove the center support and gear unit assembly (640-672) by lifting the J 38868 remover and installer with the J 6129 handle .
  14. Remove the J 6129 handle and the J 38868 remover and installer .

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