The after market unit that Bill referred to is still around but they are expensive and not very good. They are fine for low speeds and parking lots but don't give you a good feel of the road in regular driving. Almost dangerous. I did everything possible to make the one I had perform right, reduced pump pressure, replacement tie rods, tire pressure, alignment, rebuilt the control valve, and others. I ended up replacing it with a Toyota PS box. It's not an easy conversion, but worth it. Fred
