Loud clanking from drive shaft. How to diagnose bad shaft?

[Kneale Brownson]

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Earlier quattro systems let you lock the center differential,
Konstantin.  That's what Rex did on his '87.

At 11:28 AM 06/11/2002 -0400, Konstantin Bogach wrote:

>Rex,  thank you for resonse and advice.  But, isn't diff lock supposed to
>disengage above certain speed (5mph comes to memory)?
>
>Konstantin.
>
>Rex Pedersen wrote:
>
> > I had something similar on my 87 5ksq when I rebulit it from a wreck. The
> > driveshaft looked fine and would run fine on a hoist, but would clank like
> > crazy under load. Turned out that the CV "cage" was cracked when the
> > driveshaft was pushed back. At that time (1988) was a new driveshaft assy
> > from Audi for about $1000.00. I had it taken apart and took the cage to an
> > axle rebuilder. It was the same as something in a VW. It's been working for
> > 150k miles and 13 years now. You will probably have to tear into the CVs to
> > see what is wrong. Can't remember about the 89's but you can run the 87
> > without the driveshaft. Just lock the diff and you have a front driver. Did
> > this for a few weeks when I replaced the center bearing.
> >
> > Rex Pedersen
> > Ludington, MI
> > 90 V8Q
> > 87 5ksq
> > 86 5ks wagon
> >
> > Hi listers.
> >
> > Now it is drive shaft.  I think it is drive shaft.  Clanking comes and
> > goes while I drive, always stops when coasting on neutral,  no
> > dependency on whether I turn or go straight, louder and more distinct
> > when I move slowly.  Shaft does not touch anything.
> > Does it sound definitely like bad drive shaft?  Is it possible to
> > diagnose CV and U-joint while shaft is on a car?
> > Can someone recommend a good source for rebuild shaft or CV and
> > U-joints?
> >
> > Thank you.
> >
> > Konstantin Bogach
> > 200tq '89
> > 200tqa '89
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