GM Service Manual Online
For 1990-2009 cars only
  1. Inspect the following components for excessive wear and/or fit:
  2. • The pinion gear shaft
    • The thrust washers
    • The differential case for wear, cracks and scoring
    • The fit of the pinion gear shaft in the differential case
    • The fit of the differential side gears in the differential case
    • The fit of the side gears on the axle shafts
  3. Inspect the teeth of the pinion gears and the differential side gears for the following conditions:
  4. • Wear
    • Cracks
    • Scoring
    • Spalling
  5. Replace any worn or poor fitting components as necessary.