GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: Group and mark the shims together as originally removed. If you remove or replace the ring and pinion gearset, perform the bearing preload, backlash, and gear tooth contact pattern check in order to ensure proper contact of the gears. If you reinstall or replace the differential carrier without replacing any other component (i.e. pinion and ring gear set, bearings. etc.) then you may reinstall the carrier with the original shims in their original locations. Always perform a gear tooth contact pattern check, even when you remove only the carrier.

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the axle shafts. Refer to Rear Axle Shaft Replacement .

  3. Object Number: 667502  Size: SH
  4. Remove the bearing caps and bolts. Mark the bearing caps left and right.
  5. 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.

    Notice: 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.


    Object Number: 9730  Size: SH
  6. Remove the differential by prying the differential from the axle housing at the differential window.
  7. Remove the bearing cups, the shims, and the spacers as necessary.
  8. Mark the cups and shims left and right and in the proper order as necessary. Place the cups and the shims with the bearing caps.

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

Installation Procedure

  1. Install the ring gear, if necessary. Refer to Drive Pinion and Ring Gear Replacement .
  2. Install the differential side bearings, if necessary. Refer to Differential Side Bearings Replacement .
  3. Lubricate the differential side bearings with axle lubricant. Use the proper fluid. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.

  4. Object Number: 667660  Size: SH
  5. Place the case, with the bearing cups installed, into the axle housing.
  6. Support the case in order to keep the case from falling out of the axle housing.


    Object Number: 667502  Size: SH
  7. Install the bearing caps and the bolts.
  8. Do not torque the bearing cap bolts at this time.

  9. Adjust the differential side bearing preload. Refer to Differential Carrier Bearing Preload Adjustment .
  10. Adjust the backlash. Refer to Backlash Adjustment .
  11. Perform a gear tooth contact pattern check. Refer to Gear Tooth Contact Pattern Inspection .
  12. Notice: Refer to Fastener Notice in the Preface section.

  13. Tighten the bearing cap bolts.
  14. Tighten
    Tighten the bearing cap bolts to 75 N·m (55 lb ft).

  15. Install the axle shafts. Refer to Rear Axle Shaft Replacement .
  16. Fill the axle with lubricant. Use the proper fluid. Refer to Rear Axle Lubricant Replacement .
  17. Lower the vehicle.