Originally Posted by zetecdan

tracking and four wheel alignment are pointless if the thrust angle is wrong.
the thrust angle is an imaginary line at that runs down the centre of the car at right angles to the rear axle and the front wheel alignment is set up to it. if the thrust angle is wrong then the wheel alignment will be wrong.
best get a full geometry test done with a garage who use a Hunter machine.
google thrust angle for more info.