Is there a procedure to check the suspension in the rear of the Vanagon?  I have a random clunk that is coming from the back of the van somewhere - i cant narrow it down.  sometimes accelerating, sometimes just cruising, mostly straight but occasionally turning.  I've tried taking it in a parking lot and done tight turns to see if its CV but cant get it to clunk.  i've jacked the rear wheels and tried grabbing the wheel at top/bottom and rocking and again side to side - no play.
Any other rear suspension testing ideas?  Its a pretty loud clunk on average about once or twice each time i drive around the city.
Brett91 Vanagon, EJ22 Vancouver, BC