The outer pinion bearing on my Chrysler 8.25" burned up so i pulled it all apart and replaced both pinion bearings as well as the carrier bearings and all races. Also got new crush sleeves and a pinion seal. I set it up the first time and the pattern was a little off but i went ahead and ran it anyway. Sure enough, it made a little noise mainly on the coast side. So I pulled it apart again and changed the shims under the inner pinion bearing and got a more acceptable pattern. Well it still makes a very slight, almost not even noticeable noise so I'm going to do it all again. But what is weird is the first time i pulled it apart the pinion was loose. I just checked it today and it's loose again! I got the 12-15 in.lbs. rolling torque and used threadlocker on the pinion nut. How does the pinion keep coming loose?! After driving a bit could the crush sleeve be collapsing more? I marked the nut and it doesn't seem to have backed off any. I'm at a loss. Has this happened to anyone before?