Rear/front diff

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Originally posted by NoMoGMPG:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HummBebe:
New question:

What does HUMMER consider a normal measurement for Backlash???

The tech who put in my new R&P said the old one was at .022 (thousandths) and that normal was from .006 - .010.

He said he thought along with the possible inconsistency with the hardening process, that the backlash was way off. He shimmed it to .010 thousandths.

Holy Shiite! .022"?!?!? That's horrible!

I set mine up at .006" but acceptable is up to .009", that may explain alot. I wonder if the case is distorted, no way GM would allow that kind of excessive clearance. </div></BLOCKQUOTE>

I guess my first question would be as damaged as the gearing was, exactly how did he determine what the factory set backlash was? That damage was pretty massive, and other items were probably damaged inside the diff as well, and the stresses could have set off any measurement.

GM's spec for the backlash are:
0.003-0.010 in (0.08-0.25 mm)
With a preferred backlash of: 0.005-0.007 in (0.13-0.18 mm)