overtightened the pinion nut
Thread Starter
Teching In
Joined: May 2014
Posts: 10
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overtightened the pinion nut im doing my first 4.10 gear swap on a stock 10bolt. i read up on how to do it. all new bearings and all. i tightened my pinion nut with an impact as far as i could go. i was about to really crush the sleeve with a long breaker bar but first i checked the preload with a beam torque wrench. it showed 100 in-lb which i know is way too much. i could barely turn the yoke by hand. i didnt think my impact had enough power to crush the sleeve that fast. i backed the nut off to relieve the pressure and had to call it a day. and ive got an extra crush sleeve for the next attempt. why did it crush so fast? most people tell me an impact wont do it, you have to use a long breaker and it takes like 400 ftlbs of tq. will my pinion bearings be ok? can i reuse the pinion nut?
crush sleeve Dont mean to hijack OP's thread but I was in the process of doing mine the other day too. I got mine to 25-26 inch lbs. Then I removed the yoke and installed the seal and re-torqued the nut tight enough to not crush the sleeve anymore. When I checked the preload again I got 15in lbs??? Not sure if I should have removed the yoke after crushing or not. Was using a rebuild DVD as my guide and that is the process shown for the gm 10 bolt. Also do the pinion bearings need oil when setting preload? I did oil them but again the dvd showed the process being done dry.
