Take a look at outer cv joints inside the swingarm box, there may be loose screw
hitting inside walls.
Leon
85 Subwagen Westy

Bradley Flubacher wrote:

> Do CV joints make a sound when they're going bad? I've heard a bad one in my
> rabbit when I'd turn, but I have no experience with vanagon CV's.
>
> I'm hearing a thump thump thumping in the back end. It's not timed to the
> rotation of the wheels however.  Could this be a CV joint?
>
> Thanks
> Bradley Flubacher
> State College, PA