HELP -rear diff chatter after oilchange
Thread Starter
Pro
Joined: Feb 2005
Posts: 725
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From: East Northport NY
HELP -rear diff chatter after oilchange
04 A4 with 45k miles, optional 3.15 rear.
OK maybe I didn't do the right thing, but I had good intentions. I needed an oilchange so I went to a local MobileOne location. I always have a little chatter in the diff so I asked if he could do the rear. Mine is a little hard because of the exhaust cutouts, they are really in the way. But he said no problem, so I let him do it.
He said their oil "already has the friction additive" so I may not need to add the GM stuff.
I'm moaning and chattering pretty bad. Did circles, figure-8's....not helping. I stopped by the dealer and he said "give it 300 miles, if it still chatters come in and we can add the friction additive".
My only concern - can this damage the internals of the rear if it chatters for too long?
OK maybe I didn't do the right thing, but I had good intentions. I needed an oilchange so I went to a local MobileOne location. I always have a little chatter in the diff so I asked if he could do the rear. Mine is a little hard because of the exhaust cutouts, they are really in the way. But he said no problem, so I let him do it.
He said their oil "already has the friction additive" so I may not need to add the GM stuff.
I'm moaning and chattering pretty bad. Did circles, figure-8's....not helping. I stopped by the dealer and he said "give it 300 miles, if it still chatters come in and we can add the friction additive".
My only concern - can this damage the internals of the rear if it chatters for too long?
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
No. I had a limited slip in an Olds a few years back that got so tight on a long drive that it would literally act like a locked diff. The inside rear tire would hop on turns and as I progressed through the turn it would chatter like hell. We were on a long trip so it took a few thousand miles before I got home to get it serviced at the dealer. He dropped in some more friction modifier and I had the car another 90K miles with no diff problems.
Bill
Bill
Last edited by Bill Dearborn; May 9, 2008 at 04:48 PM.
Thread Starter
Pro
Joined: Feb 2005
Posts: 725
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From: East Northport NY
