yeah, i think all eclipse owners who mod their suspension and wheels go through this problem. i had the samething happen to me adn still does. around 70-90 mph it shakes, but before 70 and after 90 it is smooth again. i don't understand how going faster will smooth out the ride. but anyways, i read in a previous post that adding a upper strut tower bar will reduce the shaking. i plan on getting front and rear soon.
later