could be a bent wheel.....I had one that actually made my steering wheel
shift back and forth a low speeds but smoothed out above 40 or so.  Check
the tires too.
Mark

>Well, my AC hell is finally over, but I have another little mystery
>on my hands now. when driving at slow speeds the vanagon is shimmying
>from side to side. When I get above 35 or so I don't really feel it
>anymore. Seems to be left front or right rear. Tire pressure is fine.
>Am I looking most likely at shock, strut or balljoint or...?
>
>Kriss