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The PDF's available by following John's link are probably the best option. If you don't have JTIS, it's not worth installing just for the bush replacement question as there's very little relevant detail:
My car went from being totally predictable to not.
My alignment shop told me that the front control bushes were bad and that was the cause...so I replaced them,replaced the upper/lower front b joints, replaced lower shock mounts and when driven everything is tighter and the problem continues.
I must concentrate to keep the car pointed where I want it but it does not drive left or right nor does it pull. I used to be able to thread a needle at speed with the car now I'm lucky to keep it within the lines @ 75mph. I must make slight adjustments continually. I'm thinking the rear toe is out but the fact that I can't determine any consistency to this behavior has me looking for a worn component.
wj
If it feels like the rear is steering the front, suspect the 'A' Frame bushes have failed. See my post #2 in your linked thread above.
Graham
I don't know if it is or not but I'm certainly not in total control using the steering.
I have the poly bushes...guess I need to roll up my sleeves pretty soon.