Tooth Contact Pattern Check - Gearset, Dana S135
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Paint one quarter of both the drive and the coast side of the differential ring gear with marking compound.
- While applying a load, rotate the differential ring gear one complete revolution.
Correct Contact Pattern - Single Index Lightly Loaded
Correct Contact Pattern - Single Index Heavily Loaded
- 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 heel-to-toe, and toe-to-heel. Depth of the tooth contact pattern is not adjustable. Contact Spicer Service at 1-800-666-8688 for assistance if you are unable to establish an acceptable tooth contact pattern within the limits of backlash.
CAUTION:
If reusing the differential ring gear and pinion, measure and record the backlash before disassembly. Reassembling the differential 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.