Tracker 4WD L4-1.6L VIN 6 (1998)
IMPORTANT: Differential components are set to very close tolerances and are prone to wear should one component fail. In order to ensure
accurate adjustment and even wear, the ring and pinion gears as well as all tapered roller bearings and races must be replaced as sets.
23. Inspect the ring (2) and pinion (1) gears for excessive or unusual wear, cracks, overheating or other damage and replace as necessary.
24. Inspect all roller bearings and races for roughness, locking, or other wear or damage. Replace defective parts as necessary.
25. Inspect the side and differential pinion gears for unusual wear or damage. Replace defective parts as necessary.
Pinion Depth Adjustment
SETTING PINION DEPTH
Pinion depth is the distance from the face of the pinion gear to the center line of the ring gear. Pinion depth is critical to all differentials. Each ring and
pinion gear set is matched so as to produce the best tooth contact pattern. Pinion depth is controlled by placing the proper selective shim between the
pinion gear and the inner bearing. Pinion depth is set with the J 21777-B pinion setting gage set which provides a nominal or 0 as a gaging reference to
find the pinion center. If the original ring and pinion gears and pinion bearings are reused, the original size selective shim will set the proper pinion
depth.
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Tools Required
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J 3289-20 Holding Fixture Base
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J 3289-21 Holding Fixture
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J 37769 Differential Holding Fixture Adapters
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J 8001 Dial Indicator Set
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J 23597-1 Arbor
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J 23597-12 Pilot Washer
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J 21777-42 Pilot Washer
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J 21777-43 Stud Assembly
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J 21777-101 Side Bearing Discs
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J 21777-102 Gage Plate
1. Lubricate both the inner and the outer pinion bearings with wheel bearing lubricant GM P/N 1051344, or equivalent.
2. Assemble the gauge plate and the stud assembly.
