Not sure what to do about this. No problems until until I get to 50-55 MPH and then car and sterring wheel shake viloently. At first I thought it might be my front brakes since my wear indicator light went on around the time this started happening,but I Just changed all the brake pads and checked the rotors which seemed fine (no scoring). I don't think it's motor mounts, because she's fine at idle and low speeds. Any help would be great.

Bob