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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 >> Installation Procedure

Installation 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.
  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. Install the J 45222 to the axle housing as shown.
    5. Fig 1: Installing J 45222 To Axle Housing
    G01705419Courtesy of GENERAL MOTORS CORP.
  5. Install the J 8001-1 (2), the J 8001-2 (3), the J 34178 (4, 6), and the J 8001-1 (5) as shown.
    6. Fig 2: Installing J 8001-1, J 8001-2, J 34178, And J 8001-1
    G01705420Courtesy of GENERAL MOTORS CORP.
  6. Preload the J 8001-1 (5) approximately 1 revolution.
  7. Move the housing of the J 8001-1 (5) until the needle indicates zero.
  8. 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).
  9. Place the case, with the bearing cups installed, into the axle housing.

    Support the case in order to keep the case from falling out of the axle housing.

    10. Fig 3: Placing Case Into Axle Housing
    G01705421Courtesy of GENERAL MOTORS CORP.
  10. Install the bearing caps and the bolts. Do not torque the bearing cap bolts at this time.
  11. Adjust the differential side bearing preload. Refer to Differential Side Bearing Preload Adjustment .
  12. Adjust the backlash. Refer to Backlash Adjustment (All Except 9.75 Inch Axle) .
  13. Perform a gear tooth contact pattern check. Refer to Gear Tooth Contact Pattern Inspection .
  14. Tighten the bearing cap bolts.
    NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten 

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

    15. Fig 4: Tightening Bearing Cap Bolts
    G01705422Courtesy of GENERAL MOTORS CORP.
  15. Install the axle shafts. Refer to Rear Axle Shaft Replacement .
  16. Install the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement .
  17. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  18. Fill the axle with lubricant. Use the proper fluid. Refer to Lubricant Change .
  19. Lower the vehicle.
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