My '93 Quest (120K miles) started producing a thump/whump from the front end. It's rotational, not severe, but definitely wrong. Comes on around 25mph, by about 45 it seems to be gone although I think it's just frequent enough that you don't feel the individual thumps at speed. Almost feels like a flat spotted tire, but I don't think that's the issue.
I plan to wiggle the front end and swap the tires around... but anyone have any specific idea on what might cause this ?
Thanks,