Re: [syncronized] Re: Diagnosis Please

["Wm. Josiah Erikson" <wje97@hampshire.edu>]

If it's coming from UNDER the car, like the middle of the car, then it
sounds like it has something to do with the driveshaft. While I've never
seen or heard of this, maybe the center support bearing is causing this?
(Usually they whine) or maybe (really unlikely) one of the CV joints on
the ends of the prop shaft is going? Perhaps one of the mounting points
for the center support bearing somehow came loose? These are all unlikely,
but I can't think of anything that would come from under the center of the
car.
	-Josiah
	'84 GTI
	'87 QSW
	http://bork.hampshire.edu

On Wed, 21 Apr 1999, Huw Powell wrote:

> > Okay folks, I am looking for your best diagnosis, or better yet, a BTDT.  My sister's '87 QSW with 90k mi. has a driveshaft or tranny/diff problem, I think.  Symptom: in a high speed (i.e. 45+mph) situation, with the gas off, there is a rhythmic thumping coming from under the car -- I can even sort of feel it coming, it seems, more from under the drivers side.  It changes in frequency with speed, but is not affected by brakes, gear or clutch.  It is not a problem while accelerating or cruising, just when taking off the gas.  I looked quickly underneath, but did not see anything obviously amiss.
> 
> sounds like wheel bearing.  check 'em for play I guess...
> 
> -- 
> Huw Powell
> 
> http://www.thebook.com/human-speakers
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> 82 Audi Coupe; 85 Coupe GT
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