Center Support and Gear Unit Assembly Removal

Tools Required

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

NOTE: 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.
Fig 1: Locating Center Support Bolt
Courtesy of GENERAL MOTORS CORP.
1. Remove the center support bolt (25).
2. Remove the rear oil cooler pipe fitting (90).
   Fig 2: View Of Rear Oil Cooler Pipe Fitting & Seal

   Courtesy of GENERAL MOTORS CORP.
3. Inspect the rear oil cooler pipe fitting (90) for damaged threads.
4. Inspect the rear oil cooler pipe fitting seal (91) for nicks or cuts.
5. Remove the center support retainer ring (633).
   Fig 3: Locating Center Support Retainer Ring

   Courtesy of GENERAL MOTORS CORP.
6. Attach the J 38868  to the transmission main shaft. See Special Tools .
   Fig 4: Installing J 38868 To Transmission Main Shaft

   Courtesy of GENERAL MOTORS CORP.
7. Tighten the thumb screw on the J 38868  . See Special Tools .
8. Install the J 6129  to the J 38868  . See Special Tools .
9. Turn the J 6129  so that the handle shaft contacts the transmission main shaft. See Special Tools .
10. Remove the center support and gear unit assembly (640-672) by lifting the J 38868  with the J 6129  . See Special Tools .
11. Remove the J 6129  and the J 38868  . See Special Tools .
12. 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  . See Special Tools .
    Fig 5: Installing Center Support And Gear Unit Assembly Into J 21364-A

    Courtesy of GENERAL MOTORS CORP.