Power Steering box leaking?

While nothing said above is untrue or incorrect in my opinion, in my experience it's usually just a worn out seal and both can be replaced in the car via the methods suggested. 66Cuda referenced just sliding back the column/coupler enough to change the upper. I have often removed the column from the car and serviced the input seal from inside the car thru the firewall hole. Main thing to remember is, however you remove the input or output seals you want to avoid scratching, nicking, or gouging the shafts with your tools or the new seals won't seal properly. That's why the drilled hole with screw method described works well, because you are pulling the seal straight out vs. trying to deform it and pry it out. Given the low cost of the seals, a high likelihood of a successful repair, and an afternoons work it's well worth the effort.