[s-cars] Speedy driving and the driveshaft

[Djdawson2 at aol.com]

Well,
Before tipping my hand... keep in mind that I was driving in Nevada, with  no 
other cars in sight.  Max possible headcount of 3 if things went wrong  (me, 
the car, and maybe a prairie dog).
 
So, I was going along at a buck forty or so... the car, smooth as can  be.  
However, there is what I'd describe as a low frequency vibration  throughout 
the car.  To me, the symptoms of an out of balance driveshaft,  based on my past 
experience.
 
I start thinking about a car with nearly 200k miles on it, and the fact  that 
it has a more or less unserviceable driveshaft.  Likely,  the joints have 
never received grease.  I think it's probable that the  center bearing has never 
been replaced as well.
 
Any BTDT out there on these driveshafts?  Anyone actually went the OE  route 
and simply replaced the entire assembly?  If so, do you recall what  "getting 
the shaft" cost you?
 
As a sidebar... on this trip (again in very remote surroundings), I thought  
I had met the match I've often wondered about... yes, I caught up to an actual 
 RS6.  However, he had other ideas... refusing to respond to 2 very clear  
attempts on my part to play.  Ah well, perhaps another day.
 
Take care,
Dave back in Idaho.