>That's what I feel when I drive - Thump Thump Thump - I am running out of
>ideas.....
>
>It's Speed related, (feel it when slow or fast, just thumps faster) doesn't
>appear to be a separated tire
>
>Maybe I should take off all the wheels, and then reinstall them?

Try substituting your (good) spare at each corner of the van followed by
a test drive.  If the noise goes away while the spare is fitted to a
particular corner you have found a bad tire or wheel.  Tread separation
is not always readily apparent upon visual inspection.

My Westy sounded like a jack hammer going off when we had a case of tread
separation earlier this year.  Thump, thump, thump - what a racket!

Best wishes,

Tony

Anthony L. Mourkas
Hampden, Maine, USA
1984 Vanagon Westfalia
1987 Vanagon Syncro GL
1991 Jetta Eco Diesel