Flange Yoke Seal

Flange Yoke Seal
Leaks at the axle drive pinion seal originate for the following reasons:
- Damaged seal.
- Worn seal journal surface.
Any damage to the seal bore (dings, dents, gouges, or other imperfections) will distort the seal casing and allow leakage past the outer edge of the axle drive pinion seal. The axle drive pinion seal can be torn, cut, or gouged if it is not installed carefully. The spring that holds the axle drive pinion seal against the pinion flange may be knocked out and allow leakage past the lip.
A new pinion flange must be installed if any of these conditions exist.
Metal chips trapped at the sealing lip can cause oil leaks. These can cause a wear groove on the pinion flange and pinion seal wear.
When a seal leak occurs, install a new seal and check the vent to make sure it is clean and free of foreign material.