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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 944 (Rear Drive Axle) >> Repair Instructions >> Differential Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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 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 tires and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Remove the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement .
  4. Remove the axle shafts. Refer to Rear Axle Shaft Replacement .
  5. Install the J 45222 to the axle housing as shown.
    6. Fig 1: Installing J 45222 To Axle Housing
    G01705415Courtesy of GENERAL MOTORS CORP.
  6. Install the J 8001-1 (2), the J 8001-2 (3), the J 34178 (4, 6), and the J 8001-1 (5) as shown.
    7. Fig 2: Installing J 8001-1, J 8001-2, J 34178, And J 8001-1
    G01705416Courtesy of GENERAL MOTORS CORP.
  7. Preload the J 8001-1 (5) approximately 1 revolution.
  8. Move the housing of the J 8001-1 (5) until the needle indicates zero.
  9. Spread the axle housing by turning the clevis screw of the J 34178 until the needle of the J 8001-1 indicates 1.02 mm (0.040 in).
    10. Fig 3: Spreading Axle Housing
    G01705417Courtesy of GENERAL MOTORS CORP.
  10. Remove the bearing caps bolts and the caps. Mark the bearing caps left and right.
    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.
    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.
  11. Remove the differential from the axle housing using a pry bar and a block of wood.
    12. Fig 4: Removing Differential From Axle Housing
    G01705418Courtesy of GENERAL MOTORS CORP.
  12. Remove the bearing cups, the shims, and the spacers as necessary.

    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.

  13. Remove the J 8001-1, the J 8001-2, the J 34178, and the J 8001-1.
  14. Remove the J 45222.
  15. Remove the differential side bearings, if necessary. Refer to Differential Side Bearings Replacement .
  16. Remove the ring gear, if necessary. Refer to Drive Pinion and Ring Gear Replacement .
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