Got the 85 500 sel aligned and tires balanced but the car still shakes at speeds over 70mph. If I push to higher speeds, the vibration lessens and then returns at even higher speeds. I didn't push any higher in fear of tickets....I just want the car to be shakeless up to 90mph. The steering wheel vibrates (a bit in the left right direction but more so the whole column, up and down), along w/ the rest of the car. I can feel the vibration on the floor, seat and the dash shakes a bit too.
The front suspension was checked out okay. What do I check next?


Don