since ive owned my 2001 gtp its shaked at speeds from 45 plus. Ive now had 2 different sets of rims, which i 4 put new tires on both, got an alignment twice in 8 months, balanced the wheels, had a front sway bar replaced along with 2 front wheel bearings, and now it STILL shakes. BUT, it only shakes around 50-65 mph when im doing 75-80 on the highway it doesnt shake what so ever doesnt steer to one side, nothing. i have gone to 2 different mechanics, and than had my wheels and everything done at a tire shop and they claim nothing is wrong with the suspension. I'm at a loss, so any help would be appreciated