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Rear End - Differential

6 messages,  Last post on Dec 26, 2009 at 3:00 AM

You are in the GMC Safari & Chevy Astro Forum.

What is this discussion about? Chevrolet, Chevrolet Astro, Van

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#1 of 6 Rear End - Differential by astrovette

Sep 12, 2007 (11:42 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

#2 of 6 Re: Rear End - Differential [astrovette] by tmcdougall

Sep 30, 2007 (4:48 pm)

Replying to: astrovette (Sep 12, 2007 11:42 am)
having the same problem hoping someone can help

#3 of 6 Re: Rear End - Differential [tmcdougall] by astrovette

Oct 01, 2007 (6:21 am)

Replying to: tmcdougall (Sep 30, 2007 4:48 pm)
Look under discussion title: GMC Safari/Chevy Astro #1636 for extensive feedback.
 
Hope this helps.

#4 of 6 Re: Rear End - Differential [astrovette] by professorie

Aug 23, 2009 (6:56 pm)

Replying to: astrovette (Oct 01, 2007 6:21 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 6 Re: Rear End - Differential [astrovette] by professorie

Sep 22, 2009 (1:32 pm)

Replying to: astrovette (Oct 01, 2007 6:21 am)
Astrovette:
Thanks for your reply to my question, but how do I get to #1636?
--professorie

#6 of 6 Re: Rear End - Differential [astrovette] by zoner420

Dec 26, 2009 (3:00 am)

Replying to: astrovette (Sep 12, 2007 11:42 am)
i have an 01 astro i just bought it dose the same thing i had an 05 tahoe that did that and i took it in and they said it was the drive shaft that it needed to be repacked with grease so they did it and it stopped for a few months and stated again

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