Yesterday's adventure at the sand dunes ended up with the power steering not working correctly. We hit a dune a little harder than normal and when we got to the top the steering wheel was stiffer. We checked out the fuses, suspension, and unhooked the battery to reset the system. When stopped and at low speeds the steering is stiff but is working, at higher speeds it feels more normal. It just feels out of calibration. Any ideas or help would be appreciated!