Check your rims to make sure theres not a slight dent on the rim.. I hit a pothole here in Shithole Pennsylvania and it about ripped off my rim.. Went home and looked, no flat tire or nothing.. Woke up the next morning and it was flat.. I pumped it up and it was okay.. Brought it home pulled the tire off and it was all jacked up.. I beat it out just a bit and had another weight put on.. My car would drive fun up to about the 60-65 mark, then my car would start vibrating like hell.. Once i got to 80 or more it'd calm back down.. It was weird
yes this is exactly what happens...it would vibrate..then calm down..I got an engine tuning...so now the vibration is between 80 and 90. Im puttin on some new rims in a few days....as soon as my lug nuts get here. hehe cant wait. I'll let you guys know how that turns out with the vibrating thing...then we can get this cleared up...hopefully.