Undesirable Noise from rear end

[Greville H. Bowles]

To add to what George has said:

The noise becomes noticeable at about 10 -20 mph and gets progressively
louder. At highway speeds it's way beyond annoying. I thought that the noise
was somewhat reduced when cornering so I went out tonight to test this on a
few local "twisty bits". On hard left cornering the sound all but
disappears, while it is only slightly reduced when turning right.

What do we look for next?  Any & all help is appreciated.

~~~~~~~~~~~~~~~~~~~~~~~~~
Mr. Greville H. Bowles
RR 5 Rockwood, Ontario
N0B 2K0     CANADA
zaphod at cansafe.com
~~~~~~~~~~~~~~~~~~~~~~~~~

----- Original Message -----
From: George Harris <harchris at smokesignal.net>
To: <quattro at audifans.com>
Sent: Tuesday, May 27, 2003 7:32 PM
Subject: Undesirable Noise from rear end


> A fellow lister and I along with our respective wives went away for the
> weekend to Limerock. Sorry we missed the other listers, but we did see
> lots of Audis.
>
> While sitting in the rear, a whine that started above 10 mph and was
> definitely speed related, became a bit annoying. The owner thought that
> the noise was due to his aggressive tire treads. The tire shop says it
> isn't due to the tires, so we checked a few more things.
>
> The oil in the rear diff was low, so we topped it up. Noise still there.
>
> Checked all the CV boots, and there were no tears.
>
> The hubs were still cool after a high speed run, so it isn't obvious
> that it is the bearings.
>
> With one rear wheel in air, there is a fair amount of play  and some
> noise in the drivetrain when I rotate the rear wheel.
>
> How would we determine what the problem is?
>
> The patient is a '95 Model 90 Quattro with 140,000 Km on it.
>
> Cheers
> George
>