Hi Moses,
I have your book and I am working on a AMC 20 axle that was leaking at the driver axle seal. I installed axle seal, axle and drove the cup in flush with the axle flange. At this point I checked axle endplay and have 0.006". I then installed the shim that was on the vehicle, backing plate, etc and torqued the backing plate to 38 ft lbs. I rechecked endplay and had 0.006". moved on to install hub and after torqueing to a minimum of 250ft lbs and getting my 1 and 5/16" both axle have 0.090" of endplay. Do I need to replace the outside shim or is there a shim kit that goes between the bearing cup and backing plate. Both axle seals where previously replaced two times by two different people and I am beginning to believe end play has been the cause all along.
Thanks,
Brian