1995 GLT with 93K miles. Now has a significant vibration at hightway speed, anyhing over 65 mph causes the steering wheel to shake such that it is quite fatiguing to drive the car. Since this began I have replaced the left front wheel bearing (needed to be done anyhow), replaced all four tires and wheels and had them balanced on a Hunter road force machine, replaced the ball joints, and the rack and pinion have been remanufactured, also an alignment after all the above was done. It's better, but it still happens enough for me to notice. I've thrown almost $2K into this problem. Anyone have any idea of "one last thing to try" before I give up and sell the car? It has been mine since new, babied, and I otherwise love the car and have had very little other trouble with it until this started a year ago.

THanks, Tony