AMC 20 Problems (rebuild) - Pirate4x4.Com : 4x4 and Off-Road Forum

NotSafe · 10-17-2007, 07:48 PM

A friend brought me over a (New to Him) AMC 20 with maybe 100 miles (PO went a different route), the PO geared it up with 4.10 and a locker.. When I checked it out the pinion was loose (slop), I told him I would rebuild it just incase because you I dont trust some people.. I tore into the axle and there was bearly any wear but the bearings didnt feel new and yet didnt feel old.. I noticed the crush sleeve wasnt crushed eitherand it didnt feel like the outer bearing was properly seated.. Anyways I go ahead and rebuild it.. The only problem Im having is that now after setting it up with a set up bearing, I put the new bearing on and its tight, I mean stripping 3 pinion nuts tight 3 different times before the bearing is seated (1st one original and already messed up) The pinion threads are fine and its the right nut.. Ive never delt with a bearing being so tough, Im almost wondering if the pinion might be bent or the bearing is, Im thinking about putting the pinion on a lathe and checking and or take some sandpaper to it to take about a .001 or more off.. Has any one ever had this issue with the axle?

crashnzuk · 10-18-2007, 01:26 AM

Am I to understand you are using the pinion nut to draw the pinion through the bearing, thus pressing it on? If so, why would you do this? They make a thing called a "shop press" that will handle this sort of thing with ease. If you are having some other problem that I am not understanding, ignore the previous statement.
Travis..

NotSafe · 10-18-2007, 11:16 AM

I cant get the whole axle in the Press.. Typically thats what you do when your trying to put the pinion together, Its the forward bearing..

cjdarrin · 10-18-2007, 12:00 PM

must be wrong bearing, I put one together yesterday and I pushed the bearing on with very little effort, just measure the inside of the bearing and the outside of the pinion and you should have your answer..

10-17-2007, 07:48 PM	#1 (permalink)
NotSafe Registered User Join Date: Sep 2007 Member # 99496 Location: Minot ND Posts: 90	AMC 20 Problems (rebuild) A friend brought me over a (New to Him) AMC 20 with maybe 100 miles (PO went a different route), the PO geared it up with 4.10 and a locker.. When I checked it out the pinion was loose (slop), I told him I would rebuild it just incase because you I dont trust some people.. I tore into the axle and there was bearly any wear but the bearings didnt feel new and yet didnt feel old.. I noticed the crush sleeve wasnt crushed eitherand it didnt feel like the outer bearing was properly seated.. Anyways I go ahead and rebuild it.. The only problem Im having is that now after setting it up with a set up bearing, I put the new bearing on and its tight, I mean stripping 3 pinion nuts tight 3 different times before the bearing is seated (1st one original and already messed up) The pinion threads are fine and its the right nut.. Ive never delt with a bearing being so tough, Im almost wondering if the pinion might be bent or the bearing is, Im thinking about putting the pinion on a lathe and checking and or take some sandpaper to it to take about a .001 or more off.. Has any one ever had this issue with the axle?

10-18-2007, 01:26 AM	#2 (permalink)
crashnzuk Registered User Join Date: Mar 2003 Member # 17632 Location: West Sacramento, CA Posts: 5,358	Am I to understand you are using the pinion nut to draw the pinion through the bearing, thus pressing it on? If so, why would you do this? They make a thing called a "shop press" that will handle this sort of thing with ease. If you are having some other problem that I am not understanding, ignore the previous statement. Travis.. __________________ 74 Ramcharger, 360, 4spd, 60/70 on 37s 91.5 Dodge 6BT 5 spd tow rig

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10-18-2007, 11:16 AM	#3 (permalink)
NotSafe Registered User Join Date: Sep 2007 Member # 99496 Location: Minot ND Posts: 90	I cant get the whole axle in the Press.. Typically thats what you do when your trying to put the pinion together, Its the forward bearing..

10-18-2007, 12:00 PM	#4 (permalink)
cjdarrin Registered User Join Date: Sep 2007 Member # 99490 Posts: 23	must be wrong bearing, I put one together yesterday and I pushed the bearing on with very little effort, just measure the inside of the bearing and the outside of the pinion and you should have your answer..