Thread: 4.11 true-trac
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Old 02-02-2020, 08:19 PM   #18
IWANTA(ss)
 
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Drives: 13 1LE 1SS/05 ZX10/02 Silverado/14
Join Date: Nov 2014
Location: Brandon,Mississippi
Posts: 487
Quote:
Originally Posted by Pro-tuned View Post
Eaton suggests specific mineral based GL5 rated 80W 90 without friction modifiers or synthetic type oils...

https://www.eaton.com/us/en-us/produ...trac-faqs.html
I’m running that now it’s just cheapo parts store brand.




Quote:
Originally Posted by alice View Post
If the noise is as pronounced as you indicate, one can be sure that the contact pattern is incorrect and/or the backlash needs to be adjusted. Setting up proper gear contact patterns on both the drive and coast side is very time consuming and in most all cases, requires several teardowns and incremental adjustments in order to get the patterns correct.

This noise will NOT go away no matter what lube you use or what bushing you have. If it is annoying, the only way to fix the problem is to tear the diff down again and make shim changes. Be sure all bearing pre-loads are mandated first, then on to pinion depth adjustment and backlash until the patterns on both drive and coast sides are all but perfect. Then and only then will the diff be quiet. Hope this helps. Good luck.
I’d have take the rear back out and then send it back to GPI if it’s just going to be noisy I think I can deal with it
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02 Stepside Silverado
05 ZX-10
13 1LE
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