Dodge voyagey dashboard shakes at certain speeds above 75 mph. Everyonce in a while its it will be fine for a minute and then start shaking a ton. Whats causing this?

Any car that I owned that had this issue usually needed a new set of tires FYI. That'd be the first thing I check.

Then I'd check the tranny fluid...then any fuel delivery issues...then wires/plugs. :2cents: