don't know if any1 has an answer 2 this but when i get about 65mph the car starts 2 vibrate. i had it looked at w/ a local shop and found out that there was a flat spot in my front tires and had them replaced, it helped but the vibration was still there. had it looked at again found out the rear pass wheel bearing had siezed up and had the assembly replaced which let me tell you is expensive since toyata doesnt make the bearing on its own. that helped but the vibration is still there. when i cruise at 70 on the highway its enough 2 get the rear decklid 2 vibrate and you can hear it. i've had the car aligned new tires and a new rear hub assembly put on but it still vibrates. does ne1 have ne suggestions on what could possibly b causing the vibrations, i've put in almost 1g in2 this damn car in 2months and i cant afford 2 put more in right now but want a direction on what i should b looking at. any help would b much appreciated