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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Front Drive Axle - 4WD >> Repair Instructions >> Gear Tooth Contact Pattern Inspection >> Testing Procedure

Testing Procedure

  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 lest 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: Observing Pattern On Ring Gear Teeth
    G01643042Courtesy of GENERAL MOTORS CORP.
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