I have a 86.5 that vibrates at 50 to 60mph everytime I drive. This vibration goes through the steering wheel, consol, mirror, most every part of car.I have replaced the ball joints, control arms, and u-joints, and it still vibrates. I think the center support bearing for the driveshaft may be bent. One mechanic I spoke to thought it could be something in the transmisson, what is the possibility of that or is it more likely driveshaft.