05-17-2012 02:15 PM
There are so many elements involved but begin with the most simple.
Sounds funny, but are the tires the same size, do they have the same wear patterns and have the same air pressure? Very first part of aligning.
Then from under the car, pick major points - ball joints, rear control arm bolts or rear sub frame bolts and measure these across the car...make sure both are the same length.
Check strut towers and front sub-frame
Check that ride height is equal left to right
Check control arm bushings and ball joints
Make sure the sway bar/endlink isn't bent on one side
Are both springs in good shape?