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Rear End - Differential

5 messages,  Last post on Sep 22, 2009 at 12:32 PM

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#1 of 5 Rear End - Differential by astrovette Sep 12, 2007 (10:42 am)
I have a 2001 Chevy Astro 2wd w/ 55,300 miles   I recently had the rear end replaced due to a bad diff (as per mechanic). There was a constant noise coming from the rear when I accelerated. Now I'm getting a thumping sound from the rear when I release the brake after stopping. I've been back and forth w/ the mechanic as he does not seem to know what the problem is. First he thought and still thinks its the brakes not releasing properly. I think it may be a bad rear end from the salvage.   Can anyone provide guidance as it's getting riduculous going back and forth to the mechanic Replies to this message: tmcdougall (Sep 30, 2007 3:48 pm) astrovette (Oct 01, 2007 5:21 am) professorie (Aug 23, 2009 5:56 pm) professorie (Sep 22, 2009 12:32 pm)
#2 of 5 Re: Rear End - Differential [astrovette] by tmcdougall Sep 30, 2007 (3:48 pm)
Replying to: astrovette (Sep 12, 2007 10:42 am) having the same problem hoping someone can help Replies to this message: astrovette (Oct 01, 2007 5:21 am) professorie (Aug 23, 2009 5:56 pm) professorie (Sep 22, 2009 12:32 pm)
#3 of 5 Re: Rear End - Differential [tmcdougall] by astrovette Oct 01, 2007 (5:21 am)
Replying to: tmcdougall (Sep 30, 2007 3:48 pm) Look under discussion title: GMC Safari/Chevy Astro #1636 for extensive feedback.   Hope this helps. Replies to this message: professorie (Aug 23, 2009 5:56 pm) professorie (Sep 22, 2009 12:32 pm)
#4 of 5 Re: Rear End - Differential [astrovette] by professorie Aug 23, 2009 (5:56 pm)
Replying to: astrovette (Oct 01, 2007 5:21 am) I believe I've got the same problem on my Safari 2002 AWD. One mechanic said that he thinks it has to do with a clutch-type plate in the rear differential which is slipping, creating a kind of thumping under acceleration and even deceleration. His solution is to open up the differential, replace the fluid and add a prescribed GMC additive that will reduce the problem although not completely solve it, at a cost of approximately $125. Apparently he had to do the same job on a RendezVous. If there's another more accurate analysis of to this problem, I'd like to hear it. By the way, how can I access the discussion #1636 mentioned in the # 3 box above?
#5 of 5 Re: Rear End - Differential [astrovette] by professorie Sep 22, 2009 (12:32 pm)
Replying to: astrovette (Oct 01, 2007 5:21 am) Astrovette: Thanks for your reply to my question, but how do I get to #1636? --professorie

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