Steering doesnt return to center on its own

So after replacing a dangerously faulty lower ball joint, a leaking power steering box, and adjusting the tow, via the tie rods, my steering wheel is dead center and the car travels straight. YAY! However when I'm coming out of a turn the wheel doesnt streighten out on its own. The slop / play in the steering wheel is virtually nonexistant now (thanks to the replacement box). And no more trouble with it steering hard left as though its posessed by demons....thankfully! Tire pressures are up to specs. Should I disconnect the pitman arm and raise her up to feel for binding in the steering linkage? Or is this a dreaded caster or camber adjustment?