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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Front Drive Axle >> Repair Instructions >> Gear Tooth Contact Pattern Inspection >> Testing Procedure
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Testing Procedure

  1. Wipe clean the differential case, the ring gear and the axle housing of lubricant. Carefully clean each tooth of the ring gear.
    2. Fig 1: Applying Gear Marking Compound To Ring Gear Teeth
    GM622281Courtesy of GENERAL MOTORS CORP.
  2. Use a medium stiff brush in order to sparingly apply gear marking compound, GM P/N 1052351 (Canadian P/N 10953497) or equivalent, to all of the ring gear teeth.
  3. Torque the bearing caps bolts to specification.
    4. IMPORTANT: Avoid turning the ring gear excessively.
  4. Using a wrench, turn the drive pinion flange/yoke so that the ring gear rotates 3 full revolutions.
  5. Turn the drive pinion flange/yoke in the opposite direction so that the ring gear rotates 3 full revolutions in the opposite direction.
  6. Observe the pattern on the ring gear teeth. Compare the pattern with the following illustrations.
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