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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 708 (Front Drive Axle) >> Repair Instructions >> Gear Tooth Contact Pattern Inspection >> Testing Procedure
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Testing Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Wipe clean the differential case, the ring gear and the differential carrier housing of lubricant. Carefully clean each tooth of the ring gear.
  2. Use a medium stiff brush in order to sparingly apply gear marking compound GM P/N 1052351 (Canadian P/N 10953497) to all of the ring gear teeth.
    IMPORTANT: Avoid turning the ring gear excessively.
  3. Using a wrench, turn the drive pinion flange/yoke so that the ring gear rotates at least 3 full revolutions.
  4. Turn the drive pinion flange/yoke in the opposite direction so that the ring gear rotates at least 3 full revolutions in the opposite direction.
  5. Observe the pattern on the ring gear teeth. Compare the pattern with the following illustrations.
    Fig 1: Showing Pattern On Ring Gear Teeth
    G01480541Courtesy of GENERAL MOTORS CORP.
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