Yeah, swap the tires left-for-right and see if the pull changes. IF so, you could have a bad tire.
Also there is the possibility that soemthing's loose in the rear axle. I always suspect trailing arm bushings. When these are bad, the rear axle can "steer" a bit- it literally turns in its mounts and can angle the car differently, sometimes it pushes one way under power, the other way when braking. If it is loose, this throws off the "thrust line" that shops use to align the front wheels. Essentially it is the reference angle for all front end measurements- and if it can move around the results are unpredictable. Get it up in the air and see if there is any movement in these big bushings where the axle meets the lower trailing arms. A big pry bar will immediately show any play here.
The bushings are cheap, but the labor can be a bit pricy. Expect 1 to 1.5 hours per side.
Good luck!
--
Rob Bareiss, New London CT ::: '86 244DL- 215K, 87 244DL- 230K, 88 744GLE- 198K, 91 244 180K
|