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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Rear Drive Axle) >> Repair Instructions >> Differential Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Group and mark the shims together as originally removed. If you remove or replace the ring gear and drive pinion, the differential side bearing preload, backlash, and gear tooth contact pattern check procedures must be performed in order to ensure proper contact of the gears. If you re-install or replace the differential assembly without replacing any other component (i.e. drive pinion and ring gear, differential side bearings, etc.) then you may re-install the differential assembly with the original shims in their original locations. Always perform a gear tooth contact pattern check, even when you remove only the differential assembly.
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the tires and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
  3. Remove the brake calipers. Refer to Rear Brake Caliper Replacement .
  4. Remove the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement .
  5. Remove the axle shafts. Refer to Rear Axle Shaft Replacement .
  6. Disconnect the electronic locking differential coil harness connector.
    7. Fig 1: Positive Terminal Lock Reinforcer
    GM841763Courtesy of GENERAL MOTORS CORP.
  7. Remove the positive terminal lock reinforcer using the J 38125-552.
    8. Fig 2: Pushing On Terminal Release Tabs Within Connector Housing Using J 38125-12A
    GM841772Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the terminals from the electronic locking differential coil connector by pushing on the terminal release tabs within the connector housing using the J 38125-12A.
    9. Fig 3: Electronic Locking Differential Coil Connector Housing
    GM841758Courtesy of GENERAL MOTORS CORP.
  9. Remove the electronic locking differential coil connector housing.
    10. Fig 4: Differential Bearing Adjuster Nut Lock
    GM667492Courtesy of GENERAL MOTORS CORP.
  10. Remove the right side differential bearing adjuster nut lock.
    11. Fig 5: Locking Differential Coil Assembly Lock Bolt
    GM841754Courtesy of GENERAL MOTORS CORP.
  11. Remove the locking differential coil assembly lock bolt.

    Do nut reuse the bolt.

  12. Remove the locking differential coil assembly lock.
    13. Fig 6: Left Side Differential Bearing Bolts
    GM841742Courtesy of GENERAL MOTORS CORP.
  13. Remove the left side differential bearing bolts.
  14. Remove the left side differential bearing cap.
    15. Fig 7: Locking Differential Coil Assembly Wiring From Axle Housing
    GM841717Courtesy of GENERAL MOTORS CORP.
  15. Remove the locking differential coil assembly wiring from the axle housing.
    16. Fig 8: Identifying Bearing Cap Bolt
    GM667502Courtesy of GENERAL MOTORS CORP.
    CAUTION: To prevent personal injury and/or component damage, support the differential case when removing the case from the axle housing. If the case is not supported, the differential case could fall and cause personal injury or damage to the differential case.
  16. Remove the right side differential bearing cap bolts.
  17. Remove the right side differential bearing cap.
  18. Loosen the differential bearing adjuster nut using the J 24429  . See Special Tools .
    19. Fig 9: View Of Differential Case And Axle Housing
    GM667660Courtesy of GENERAL MOTORS CORP.
    NOTE: When removing the differential case from the axle housing, do not damage the cover gasket surface. If the cover gasket surface is damaged, lubricant may leak from the axle and cause premature failure of the axle assembly.
  19. Remove the differential assembly.
  20. Remove the shim and the differential side bearing cups.

    Mark the differential side bearing cups left and right. Place the differential side bearing cups with the differential bearing caps.

  21. Remove the differential side bearings, if necessary. Refer to Differential Side Bearings Replacement .
  22. Remove the ring gear, if necessary. Refer to Drive Pinion and Ring Gear Replacement .
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