To change the Axle Seal.....
(A) Drain the Rear End
(B) Pull the Rear End Cover off
(C) Locate the effect axle on the differential
(D) There is a "C" clip at the end of the axle
(E) Remove "C" clip
(F) Pull axle out of axle tube
(G) Remove bad seal
(H) Install new seal
Reverse your steps to restore your rear end.
New Parts:
(a) Rear Cover Gasket
(b) Hydro Filter
(c) Axle Seal
(d) New Hydro fluid - ie: HyTran
Rear end should be be cleaned out and up before reassembly.