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Home >> Cadillac >> 2008 >> Escalade RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Transfer Case - BW 4485-Nr3) >> Repair Instructions - Off Vehicle >> Transfer Case Cleaning and Inspection >> Differential Components

Differential Components

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Inspecting Planetary Differential Components
    GM819683Courtesy of GENERAL MOTORS CORP.
  1. Clean the planetary differential in cleaning solvent. Do not disassemble the planetary differential.
  2. Air dry and ensure all cleaning solvent is removed from the bearings in the pinion gears (3). Do not spin the pinion gears with compressed air.
  3. Inspect the pinion gears for chipped teeth.
  4. Inspect the pinion gears for debris embedded in the root of the teeth.
  5. Inspect the pinion gears for excessive side movement from worn bushings or shafts.
  6. Inspect the planetary housing for cracks at the web (1) of the housing.
  7. Inspect the thrust washer surface (2) for scoring or excessive wear.
  8. Inspect the planetary housing for distortion.
  9. Inspect the planetary housing to mainshaft splines for excessive wear.
  10. Replace the planetary differential if any of the above conditions are found.
  11. Inspect the planetary thrust washers for excessive wear or scoring.
  12. Replace the thrust washers if they are faulty.
  13. Fig 2: View Of Front & Rear Sun Gears
    GM833017Courtesy of GENERAL MOTORS CORP.
  14. Clean the front sun gear (1) and the rear sun gear (2) in cleaning solvent and air dry.
  15. Inspect the teeth on the front sun gear (1) and the rear sun gear (2) for the following conditions:
    • Chipped teeth
    • Excessively worn gear surfaces

      Slight wear marks are normal.

    • Debris embedded in the root of the teeth
  16. Inspect the thrust washer surfaces for excessive wear or scoring.
  17. Replace the front sun gear (1) and the rear sun gear (2) if they are faulty.