A body Power Steering "self turns"

I know this is an older thread, but was very helpful. After installing a rebuilt box and driving it for the first time today, it was really pulling to the left. I couldn’t understand why it would need an alignment for just the gearbox. That wasn’t the problem, the solution was like BigBlock said. Just had to play with it, my first try made the wheels go all the left parked by themselves. Never would have know, problem solved!