Shifting Problem

[BIIprospector]

I have an auto-magic in my B2 and I was out wheelin last week, when I tried to shift into reverse my column shifter just moved freely up and down, like the cable broke. I looked at the linkage, and it was moving correctly and everything was connected. The piece on the shift shaft was moving, but the shaft was not. When I tightened the nut that holds the shift piece and kickdown piece to the shaft, I felt it try to grab, and when I pulled outwards on the shift piece I could shift into the gears. Any Ideas? I dont want to climb under my rig whenever I want to change gears