Question about 2001 Pontiac Aztek

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I have a "groaning" sound coming from my rear differential. I just got the fluid changed in the diff (using the proper fluid for the 2L) and the mechanic said that he noticed that the teeth/gears were stripped. Would this cause the groaning?

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If the teeth are "stripped" as the mechanic states, all of that metal gets ground into the fluid and destroys bearings. You might be looking at getting all of the bearings replaced, aside from the gear issue.

Posted on Aug 24, 2010

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