Originally Posted by
ZX2 Nick
Other than a bad tire or tires (even brand new) which can cause a constant pull, the ONLY thing that can cause a car to pull or travel (to the right in this case) is wheel alignment, there is no "something else".
If the alignment numbers are good (as they seem to be) the only components in the rear suspension that affect rear wheel steering would be a toe link or other lateral link that is moving under load because of a bad bushing or mounting hole on the frame end. The alignment is done with all these components at rest. The alignment is good at rest though under load something is moving then you have different alignment values which can steer the car abnormally.
Thanks for the clarification. I guess I see your point. Under load the alignment is bad, but that doesn't really point to anything specific, except that
a part is moving abnormally under load. None of the links have bushings any longer, it's all spherical ball bearings and most of those are brand new. Caster arms are old but as solid as everything else. What would I look for in a bad "mounting hole"? All I can see left to check is the control arm itself is flexing or bad bushing. Or the sway bar isn't doing anything and doesn't keep the tires even under load, allows them to point different directions. If my differential was goofed up, maybe one wheel would accelerate unevenly and push the car in a direction? I'm stretching beyond my experience here.