Operation CHARM: Car repair manuals for everyone.

Ring and Pinion Gears

Inspect
- Ring and Pinion gear teeth for cracking, chipping, scoring, or excessive wear.
- Pinion splines for wear.
- Pinion flange splines for wear.
- The fit of the pinion gear on the pinion flange.
- The sealing surface of the pinion flange for nicks, burrs, or rough tool marks which would cause damage to the seal's inside diameter and result in an oil leak.
- All worn or broken parts and replace if necessary.

Important:
- Ring and pinion gears are matched sets and both are replaced any time a replacement of either is necessary.
- A new pinion flange must be installed when the ring and pinion gears are replaced to maintain proper system balance.