Rear Axle Position.

Did u guys ever stop to think that maybe the diff isn't out but the body panels are. One way to find out is a 4 wheel alignment by someone that knows our cars. By shimming the diff u may be causing it to dog track slightly. 1 wheel will be toed in while the other will be toed out. I see it all the time. Kim

Yup. Frame tolerances weren't great but they were definitely better than the body tolerances were. Gotta figure out the thrust angle before you shim the axle.