Originally Posted by
gubbs3
The "left pull" can also be caused by binding in the rear axle. Any binding in the rear axle will cause more power to be put into the right rear tire (diffing out slightly), pulling the car to the left under power. A hub that is too tight, bent axle, bad bearing, different ride height spacers, or shims that rub the outer bearing race can all cause binding in the axle.
Ive had my car pull one direction on green carpet despite the car not being tweaked and the axle centered etc. Sometimes if grip is low enough, the slightest difference in traction between the two drive wheels causes the car to "tank" and pull one direction.