[Adjusting AMC 20 Axle Shaft End Play]

Moses thanks for the reply 

I was working on some other projects the last few days and just had time to pull this thing apart and get back with you.   When I posted the other day I had only taken apart and reassemble the drivers side.  I replaced the axle seal installed the axle and bearing cup and set 0.006" of endplay and installed all parts in the order that are shown in the above diagram.  Today I disassembled both sides and found that the drivers side cup in backing out and that is how I am loosing endplay.  I could remove the shim but that would only make my endplay go from 0.090 to 0.085" after the bearing cup walk to the end of the axle flange.  when i had 0.006" end play my driver side bearing cup was seated into the axle flange about 0.090" deep.  so this is why i asked if they make shims that go behind the bearing cup and #6 on your diagram.  i also after tearing all the way down today wanted to verify someone didn't swap axles on me my drivers side axle is 28.5" and passenger side is 31.5" 

[Adjusting AMC 20 Axle Shaft End Play]

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