4kq, thrum at speed

[Robert Mangas]

>From: jesper moreau <jesper5ktqm.audi at gmail.com>

   Hi jesper- thanks for the response!

     Noise is speed-related; you can kind of hear it when going slow but 
really feel it in the car at 40mph and above.  Hard to differential how much 
of it is sound and how much is feel; not like these cars are models of 
refinement.  Can hear/feel it under load and when coasting.

    I did the bearings myself with a hydraulic press.  The rears are brand 
new and turned freely and smoothly before putting the uprights back into the 
car.  One of the fronts (which were both replaced the same way about 20k 
ago) was smooth but strangely stiffer than any of the others so I replaced 
it to avoid having to go in again.

Thanks again,
Robert


>Robert,
>
>I highly doubt, rather I'm pretty confident it is not your CV's. A CV
>issue could only come fro a ripped boot leading to a dry joint which
>would progressively shake your steering wheel worse and worse the
>dryer it gets. CV's don't "thrum" (lol, that is funny). I have some
>BTDT on sitting cars with a carrier bearing getting goopy inside with
>maybe a little corrosion or something and it had a thrumy/whiny kind
>of sound. I have since replaced the carrier bearing and both CV's on
>the drive shaft. I assume your noise is constant and consistant? If it
>is on shifts.... throw out bearing. If it usually occurs during
>cruising at a certain speed...Carrier bearing or wheel bearing. Who
>installed your wheel bearings. I have had plenty of "reputable" Shops
>screw the install up to have them last only 15-20k. If you read the
>archives about this, you'll notice others have experienced the same.
>Well, best of luck on figuring it out. If i can ever be of assistance,
>let me know. Email me a request for contact info.
>
>Jesper Moreau
>'88 5KTQ rocket
>'86 5KTQ stocket
>
>On Wed, 16 Feb 2005 12:46:03 +0000, Robert Mangas
><porter_t_dog at hotmail.com> wrote:
> >
> > I could use a little advice.  I just redid the suspension on my 4kq, and 
>now
> > have a sort of shudder or thrum at speed.  Tires are fresh, so I don't 
>think
> > it's that.  Bearings are 75% brand new and 25% <20k, so I don't think 
>it's
> > that.  It's either a CV joint issue  or the propshaft center support
> > bearing.  Any trick suggestions on figuring out exactly where from the 
>thrum
> > comes?  (heh, that's funny!)
> >
> >    There's no evidence of the typical bad CV-joint clacking.
> >
> > TIA,
> > Robert
> >
> > _______________________________________________
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> > quattro at audifans.com
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> >
>
>
>--
>Jesper Moreau
>'88 5KTQ rocket
>'86 5KTQ stocket