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Narrow Track AMC 20 Issues

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Joined: 03 Mar 2005
Location: Philo~town, Oregon

PostPosted: Thu May 13, 2010 6:57 am    Post subject: Reply with quote

I hope you have opportunity to check a few things on the Corporate 20. If you allow, I'd like to post what went on with mine;
I purchased my '78 CJ 5 a while back and had been having some rear axle problems. Shortly after acquiring this CJ axle grease was seeping out of the hub. Upon removing the axles we noticed that the inner wheel bearings were WELDED to the axle, not by heat/friction, but by someone with a welder! A local shop re kitted this axle (narrow AMC 20) with a Yukon 1 piece axle kit. I also had installed a axle truss/skid plate. 1st try and the bearing free play was too tight - burned up the wheel bearings. 2nd try, too loose - axle backed out of the housing shortly after leaving shop. 3rd try and things went well for about two months and then noticed some seepage at the rear hub again. Sure enough, the free play had increased. This go, a non stock bearing keeper was installed to hold bearing firmly in place -we hoped! The shop chief noticed that there were two half circle ( ) inserts incorporated into this axle that were part of the 'welded' axle, no mention of these in the AMC service manual that I luckily had acquired since getting this Jeep, and another odd thing is correct free play couldn't be obtained without these half circle inserts. We contacts Randy's Ring and Pinion and learned that a spacer was missing for the kit we had purchased from them earlier. We had to pull the dang thing apart AGAIN and with Randy's on the phone for guidance we set the bearing clearance at the long side of tolerance.
One week later I smelled that old 'hot bearing' odor I had become so familiar with, so I made a trip out to Mac's Jeep Parts and we pulled a Dana 44 out of an old Jeep Scrambler, installed a Lock Right differential and new bearings throughout and I've not had any issues since (knock on wood). After turning in the AMC 20 for core we noticed that the troubles lied in that the reason the inner wheel bearings were welded to the axle shaft were that the axle tubes had become crooked from the diff~!
I sure hope yours is an easier path!

Confusion says: People with sh!t for brains, shouldn't eat prunes
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