when I shaved my front rotors (the steering wheel was shaking) the guy said that tires are not balanced, I agreed to have them balanced. After the front wheels have been balanced and its rotors shaved, the drive is fine EXECPT during freeway drives, I feel like the rear wheels losing control. It happens everytime when I drive over 60mph. I made sure all the lug nuts are tightened but the problem persist. The mechanic did not touch the rear wheels at all. Does this sound like unbalanced rear wheels to you?

 

i would say so...the back needs to be balanced at the same time with the front..or it will throw everything off