rear end gets loose on the freeway

[crazynoll]

so ive notice this quite a bit is it comon for the car to shake side to side. the rear end feel like its rolling with the groves of the freeway.

[Mike325]

Get an alighnment. I know the rear is non adjustable without sepecial bushings, but that will tell us where your car is at. I believe that too much toe one way will cause the car to do this. Have you checked your tire pressures?

[jlevie]

Worn trailing arm or subframe bushings can cause the rear of the car to feel unstable, especially at speed.

[crazynoll]

i had the alighnment done when i put my new rack in im think it could be subframe bushings or trailing arm

[eighteight325is]

What sort of tires are you running? I've heard some tires that are right on the edge of being dedicated competition tires that are still street legal are more prone to tram-lining in small grooves in the pavement.

[crazynoll]

just regular tired nothing performance i havent balanced the rears yet tho

[Garageaholic]

Rear subframe bushings are worn.