To me, by design, the inner seal retains the gear oil for the rear differential. The outer seal is more of a dust seal for the greased axle bearings.

If the brakes are contaminated with gear oil the inner seal failed.

All 8&3/4 style rear axles have the same type of seals at the axle ends.


R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04