Contact Pattern
WARNING: This page is about a different car, the 2023 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
In general, desirable ring gear tooth patterns must have the following characteristics:
- Drive pattern on the drive side ring gear well centered on the tooth. There should be some clearance between the pattern and the top of the tooth.
- Coast pattern on the coast side ring gear well centered on the tooth, but may be slightly toward the toe. There should be some clearance between the pattern and the top of the tooth.
Acceptable ring gear tooth patterns for all axles.
Correct backlash with a thicker pinion position shim required.
Correct backlash with a thinner pinion position shim required.
Pinion position correct. Decrease backlash.
Pinion position correct. Increase backlash.