James Martin's answer was about the steering relay and not the steering box. He was responding to the question from Rodeo Joe.
Rodeo Joe, if it's been a while since your relay was topped up expect it to take a while. I use a little clear squeeze bottle from the grocery store. Take out the two bolts in the top of the relay that are front and rear of the four available. Squeeze in a little EP90. Replace bolts a little later and do again the next day or weekend, repeating until it won't hold any more. Made a HUGE difference in the steering, eliminating most play in the system. I think mine had never been filled before I bought the vehicle.