Mechanic says he observes minor age cracks, but nothing to validate replacement.
the flex disc(s). When were them last replaced? The front one
usually bears more torque/damage than the rear one.
<BLOCKQUOTE TYPE="CITE">My '91 350SD (450,000mi) has developed a come-and-go
vibration under <BR>acceleration - cruise is smooth, engine runs like a top,
no wrecks, no <BR>rear-end problems. It feels like it's coming from
the below the rear seat <BR>area - the effect is like running over slowdown
warning grooves in the road. <BR>I assume the problem is driveshaft
U-joint(s) which, mechanic says, means <BR>new/used or reman
driveshaft. Anyone with high-mileage driveshaft advice, <BR>similar
experience (or a driveshaft to sell)? Dankeschoen in advance.
<P>(ps - this is a 350SD that hasn't been a nightmare - gets 25mpg at 75mph
<BR>cruise, no leaks, no gasket problems, uses 1 qt every 2500 miles.
I love <BR>the car in spite of its worrisome reputation and want to keep