Quote:
Originally Posted by Bruce Meyer
If you take it to a frame shop they will put the car on a rack and make measurements and be able to tell you exactly what the problem is. My guess its bent control arms due to poly bushings. Poly bushings are a really bad idea on the rear of A body cars. I found out the hard way. They destroyed my upper control arms. The A body rear suspension is designed for the give of rubber bushings as the suspension is compressed. The poly bushings don't give so something else has to.
Here is some good info https://www.umiperformance.com/home/...pros-and-cons/ |
This, you don't want polygrahite stuff in the rear control arms, it's too stiff. Rubber bushings or spherical bushings only.
Depending on how the boxing of the control arms was done, it's also possible heat may have warped/stretched/shortened one or more control arms which can pull the axle out of it's centerline.
My advise in all honesty would be to skip the frame shop first and order up some aftermarket control arms for the car and install. If at that point it's still out of whack, it's a good possibility there's something frame or body oriented going on. At that point, seek help from a frame specialist.