Ok, so i discovered last night that my steering arm is positioned on the shaft so that there is a gap between the bottom of the box, and the top of the arm. my old truck did not have this gap, so I want to tighten it up. There is a washer on the nut that is bent onto one side of the nut. Point being, I can't get the nut to turn. Is there a lock pin in it or anything that keeps it from turning?