Gearset, Dana S135

1. CAUTION: If reusing the ring gear and pinion, measure and record backlash before disassembly. Re-assembling the ring gear and pinion to the recorded backlash will match the established wear patterns. Hand rolled patterns will cover less area than the established patterns.

Paint one quarter of both the drive and the coast side of the ring gear with marking compound.
2. While applying a load, rotate the ring gear one complete revolution.

Correct Contact Pattern - Single Index Lightly Loaded:

Correct Contact Pattern - Single Index Heavily Loaded:

3. Verify the contact pattern is correct.
^ Tooth contact pattern can move only by adjusting backlash. Tooth contact pattern can move only in the direction of heal-to-toe, and toe-to-heel. Depth of the tooth contact pattern is not adjustable.