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Rear diff making loud noise!!

Old Sep 24, 2011, 06:20 PM
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Rear diff making loud noise!!

I had my rear differential upgraded and an AMS billet aluminum rear diff mount installed and when I decelerate the rear makes the loudest sound I've ever heard. Has anyone else experienced this?
Old Sep 25, 2011, 01:48 PM
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I had a loud noise from the rear diff area a while back. Turned out to be a failing fuel pump (walbro). I hope its not your brand new diff.
Old Sep 25, 2011, 02:14 PM
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You gotta be more descriptive of the sound, but heres what I think:

Its probably a vibration. Thats why from the factory they use a rubber bushing so it can absorb those vibrations. Correct me if I'm wrong somebody?
Old Sep 25, 2011, 03:51 PM
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Aluminum vs rubber bushings; terrible idea for a street car. Get some polyurethane ones instead.
Old Sep 25, 2011, 05:52 PM
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Originally Posted by Fractur3
You gotta be more descriptive of the sound, but heres what I think:

Its probably a vibration. Thats why from the factory they use a rubber bushing so it can absorb those vibrations. Correct me if I'm wrong somebody?
I sounds like drone times 10. Very irritating! I hope it's just the AMS billet piece that is causing the noise.
Old Sep 25, 2011, 06:51 PM
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Then I bet that's exactly what it is.

Taken from AMS's website, under the product notes:

Originally Posted by AMS
Solid mounting the rear differential will transfer some drive train noise through the rear chassis of the car. This noise may be louder than desirable for a daily driven car.
Old Sep 30, 2011, 08:23 PM
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dammmmmmmmmmmmmmmmm
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