Have a '92 T/C van with weird problem. Front end wobbles side to side, like a rim is bent/loose,you feel it in the steering wheel and van This happens from zero to about 35-40mph,then goes away. I have checked swaybar bushings,links,tie rods,ball joints,everything seems tight. Any suggestions?

How's the tires? Usually it's tires first, then the rest.

Have you rotated the tires front to back and seen any change?

One other thing to check is the inner cv joints, if one of those were screwed up, it would cause issues like you are having.