re: vibrating 90q20v driveshaft

["Grant Lenahan" <glenahan@notes.cc.bellcore.com>]

Salomon,

You may have a center driveshaft (the one that connects the front and rear
diffs) either out of balance, or with a worn center support (BT, but not DT)
or both.

I'm doing the research right now for a more serious but similar condition
(mine bucks when shifting - the drivesahft moves so much!).  Audi sells
a new driveshaft and bearing for ~$1k (parts only).  Blauferneugen sells
the center support for $130 or will rebuld the whole thing for ~$500.

Other sources may be available.  First, have a mechanic find out what's
loose.

Grant
glenahan@notes.cc.bellcore.com