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Tooth Contact Pattern Check - Gearset: Notes

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. To check the gear tooth contact, paint the gear teeth with the special marking compound. A mixture that is too wet will run and smear; a mixture that is too dry cannot be pressed out from between the teeth.
  2. Use a box wrench on the ring gear bolts as a lever to rotate the differential ring gear several complete revolutions in both directions or until a clear tooth contact pattern is obtained.
  3. Certain types of gear tooth contact patterns on the differential ring gear indicate incorrect adjustment. Incorrect adjustment can be corrected by readjusting the differential ring gear or the pinion.
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