GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 198550  Size: MH
  1. Remove the nuts (1,18).
  2. Remove the flat washers (2,17).
  3. Notice: Do not strike the axle shaft flange with a hammer. This may damage the shaft. Do not use a chisel or a wedge to loosen the shaft or locators. This will damage the hub, the shaft and the rear wheel bearing seals.

  4. Remove the locators (3).

  5. Object Number: 198557  Size: SH
  6. Hold a brass drift against the center of the axle shaft flange.
  7. Strike he drift a blow using a 2.3 kg (5 lb) hammer.

  8. Object Number: 198550  Size: MH
  9. Remove the rear axle shaft (4).
  10. Remove the gasket (5).

Installation Procedure


    Object Number: 198550  Size: MH
  1. Install the new gasket (5).
  2. Install the axle shaft (4).
  3. 2.1. Dip the splined end in synthetic lubricant before installing. Refer to Approximate Fluid Capacities in Maintenance and Lubrication.
    2.2. Rotate the axle shaft as needed in order to align the axle shaft flange holes with the studs.
  4. Install the locators (3).
  5. Install the flat washers (2).
  6. Notice: 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.

  7. Install the nuts (1,18).
  8. Tighten

        • Tighten the nuts (12 stud rear axle) to 77 N·m (57 lb ft).
        • Tighten the nuts (8 stud rear axle) to 155 N·m (114 lb ft).

    Object Number: 198562  Size: MH

    Important: Ensure that clearance is present between the flat washers and the axle flange. If the flat washers contact the axle flange, remove the axle shaft. Inspect and replace the faulty parts.

  9. Inspect for clearance between the axle shaft flange and the flat washers.