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Home >> Hummer >> 2008 >> H3 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 (Rear Drive Axle) >> Repair Instructions >> Differential Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove propeller shaft. Refer to Rear Propeller Shaft Replacement (RWD) or Rear Propeller Shaft Replacement (AWD) .
  3. Remove the right rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  4. Remove the right wheel drive shaft. Refer to Rear Wheel Drive Shaft Replacement .
    5. Fig 1: View Of Transmission Jack Supporting Differential
    GM787236Courtesy of GENERAL MOTORS CORP.
  5. Position a transmission jack beneath the differential.
  6. Firmly secure the differential to the transmission jack.
    7. Fig 2: View Of Front Differential-To-Support Mounting Bolt
    GM728889Courtesy of GENERAL MOTORS CORP.
  7. Remove the front differential to support mounting bolt (1) and nut.
    8. Fig 3: View Of Left Rear Differential-To-Support Mounting Bolt
    GM728891Courtesy of GENERAL MOTORS CORP.
  8. Remove the left rear differential to support mounting bolt (1).

    Note that the rear differential support mounting bolts will not be able to be removed completely due to interference with the underbody.

    9. Fig 4: View Of Right Rear Differential-To-Support Mounting Bolt
    GM728892Courtesy of GENERAL MOTORS CORP.
  9. Remove the right rear differential to support mounting bolt (1).
  10. Lower the jack slightly until the mounting ear at the front of the differential clears the support attachment point.
    11. Fig 5: Releasing Wheel Drive Shaft From Rear Differential
    GM728893Courtesy of GENERAL MOTORS CORP.
  11. Using a suitable tool, carefully release the wheel drive shaft from the differential enough to install the J 44394  .
    12. Fig 6: View Of J 44394 Installed Into The Differential Output Shaft Seal
    GM814136Courtesy of GENERAL MOTORS CORP.
    NOTE: J-44394 must be installed into the differential output shaft seal prior to removing and installing the wheel drive shaft. Failure to install J-44394 as indicated may cause the splines of the wheel drive shaft to cut the differential output seal.
  12. Carefully install J 44394  the over the wheel drive shaft.
  13. Carefully slide the J 44394  into the differential output shaft seal.
  14. Continue lowering the jack, while simultaneously disengaging the left wheel drive shaft.
  15. Remove the differential from the vehicle.
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