I don't remember my car ever having this problem but the other night as I pushed it up past 130 for the first time in a long while the entire car was shaking and I could definately feel it in the steering wheel, so I immediately backed off.. I remember one time it started this and I had the tires rebalanced and it was fine, but that time it was only around 70 and up. Could my tire balance be off again?? How does that happen? Thanks in advance.. :beer: