SCCAGT

toe-in, toe-out wont make it pull. If one side is out of whack, the other side naturally compensates for it. This ends up causing tires to wear on the inside or outside depending on toe condition. Camber is what will make it pull as far as alignment is concerned. Just because its "within specs" does not mean its set-up correctly. Many newbie technicians do not understand how to set up an alignment and only look at the green numbers on the screen. Green means within spec and red is out of spec. Camber should be set, generally speaking, with the right side being -.4 degrees lower than the left. This is the amount of neg camber needed to help compensate for the crown in the road. If both sides have equal negative, or positive, camber, the car will drift to the right due to the crown.
Caster is the angle of the tires when they are turned on their axis.

And as jwog666 said, swap the front tires before you spend another penny. If it pulls the other way, one of the front tires has developed a radial pull. This condition cannot be seen by simply inspecting the tire. The only cure for this is tire replacement.

Norm Peterson

Sometimes cross-caster is used to compensate for road crown instead of a camber split (the car tends to drift toward the side having less positive caster). The advantage is that the operating cambers of the outside tires will be closer to being the same in right vs left turns taken with . . . equal amounts of enthusiasm.


Norm

rocky321

[QUOTE=flash_xx;8512305]Try a different alignment shop, preferably one that deals with race cars. Most alignment shops don't know crap about what they are doing.

Ditto to that!

Simon1

If you haven't swapped front tires side to side or front to back how do you know it's not tires?

My last set of brand new tires I had a tire that pulled. It had to be replaced.

WJBertrand

Bad bushings in the rear suspension might let the rear axle move out of alignment under load.