I hand a similar problem on my 83.5 and found the motor mount sheared.  I'm
not sure whether it was the problem or a symptom.
Steve
At 12:44 PM 8/3/2005, bueses wrote:
> > Keith, the much stiffer later transaxle mount can be retrofitted to the
> > earlier vans and in my 84 has cured the throttle-on lurch or rubber-banding
> > that used to make me crazy. Of course the 84 has 205,000 miles on the
> > bushings. Jake
>
>Interesting- my 84 Westy, which I bought 3 years ago w/ 38,500 miles on it
>has this shudder problem occasionally & I thought it was my poor
>coordination in shifting! I feel better now, but it sounds like this  is a
>design issue of the tranny mounts?
>
>Tom