I've been driving my car around, but I don't go on the freeway like ever. But yesterday I went down the highway and around 60 MPH my car started to shake alot. Like anything below 60 my car rides smoothly, but like when its over 60 it shakes like on the rumble strip or something. I checked my tires and rims but they seem fine. The tires have like 3k miles on them and the rims seem fine. Anyone else have this problem?