[urq] Driveline whine......

Ingo Rautenberg ingo.rautenberg at gmail.com
Mon Nov 2 13:54:26 PST 2009


Alternator prob:
loose belt possible.  Also possible you have/had marginal battery (one cell
going bad). But if you say all seems fine now, the loose belt sounds like
likely culprit.

Maybe driveshaft center support bearing dry? That tunnel tends to keep lots
of noise contained within the car, so those outside can't likely hear it.


On Mon, Nov 2, 2009 at 4:21 PM, Jim Fleischer <jim at almgt.com> wrote:

> Hey guys,
> So, I've got the alternator mounted back in place, and with consistent
> voltage, my car seems to be starting and running well.  Interestingly, my
> battery had run down to the point of needing a jump start while the
> alternator was just hanging with a loose belt, and while the jump pack was
> attached to the battery, the car would idle fine, however, when I detached
> it, it would stumble and want to die.  It occured to me that the running
> issues I had earlier this summer could have been attributed to inconsistent
> voltage coming from the alternator due to a loose belt.  Any thoughts?
> On a different note.......took her out for a somewhat spirited drive
> yesterday and I seem to be getting a fair amount of driveline noise, coming
> from the front right mostly, but could be both sides or under the car.  More
> noticable from inside the car than outside (had someone drive by me.)
>  Sounds are dependent on vehicle speed, not engine speed.  Happening in all
> gears, and changes pitch with speed.  Seems to be numerous "jet aircraft
> taking off" sounds.  Fairly inconsistent, but "always there" if you know
> what I mean.  The brakes don't seem to be dragging (no excessive heat
> buildup) and no cv boot leaks.  Before I dive underneath, any thoughts on
> where to look?
> I seem to remember now that someone mentioned maybe something with the
> driveshaft, but can't find the post.  Any help?  Anyting in particular to
> look for if it could be the driveshaft?
> Thanks!
> Best regards,
> Jim Fleischer
> '83 ur
> '95 s6 avant
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