i have a small vibration @ 90+mph. it does not seem to get worse the faster i go. if i put the car in neutral its still there. i have a new balancer, so i know thats not it. its done it since ive bought the car. since i noticed it, ive done alot of work to the car like a five lug conversion,gears,new driveshaft, new motor and new wheels tires. after allthat and more its still there. like i said its not bad but i would like to get rid of it. any sugestions?