[s-cars] drive shaft, knocking or vibration?

[serge]

Dave, is the noise louder at WOT (as you smack the redline in 1st gear) than
if apply the throttle in a more gentle fashion? If the noise is "load
dependent" then you most likely have a CV joint issue (on the prop shaft or
otherwise). There is a slight "pulsing" that comes with this noise, and a
mild vibration.


Drop the prop shaft and regrease those dried out CV joints.

HTH
Serge Filanovsky

95 S6 Avant



> Gentlemen,
> I get the feeling that several of us are having driveshaft problems, but
> that there may be two different issues. I certainly wouldn't describe my
> symptoms as a vibration.
> Mine makes a hollow thumping noise, almost like someone is tapping on the
> belly pan with a ball-peen hammer, at about the same frequency as if there
> were a stick in my 6-spoke wheels.  Only there under load, and most
> pronounced in 1st and 2nd gears, although perceptible in 3rd.  Oddly enough
> it went away for a couple of days this weekend. Of course, it returned for
> the work week.
> I'm hoping it just needs some new lube in the CV, or that new tranny mounts
> will take care of the noise.
> Discuss
>
> Dave "shaft noisy, but still getting the job done" Burig
>
>
>
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