I noticed the power steering box covered in atf while out on the trail today. Had someone turn the wheel while I watched it and I got an eyefull of ATF. The top threaded stud with a 17mm nut on it was loose and turning with the pitman arm. I cranked it down tight and the leak went away. What is that stud? It's in the center of the top of the box in line with the pitman arm shaft.