I had a pretzled left lower control arm before and it was barely noticable. Infact it was like that for quite some time and the only time it seemed to make a difference was when I put on bigger tires and the left rear rubbed the fender worse than the right rear. If the wheel is noticably turned to the right, I would start to suspect axle tube bent. Does the wheel spin straight or does it wobble? If it spins straight, I would say have the axle housing checked, make sure it's straight across. If the wheel wobbles when you spin it, then I would suspect axle shaft, but you still might also have a bent housing...