Contact Pattern
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. 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.
- Coast pattern on the coast side ring gear well centered on the tooth.
- Clearance between the pattern and the top of the tooth.
- No hard lines where the pressure is high.
Acceptable ring gear tooth patterns for all axles.
Correct backlash with a thinner pinion position shim required.
Correct backlash with a thicker pinion position shim required.
Correct pinion position shim that requires a decrease in backlash.
Correct pinion position shim that requires an increase in backlash.