Is there a way to tighten a new power steering gear box.

The one I bought is a remanufactured cardone gear box. When driving and I hit a bump, car goes all over the place. There is no play. It just turns to easy.
If there's no play but now there's a big difference from before than you changed something else. No play means No play. It should hold the line unless you let the wheel move. Just curious, Is there the same amount of turns left to right starting with the wheels centred?