I tried to remove mine when I got my van to paint the post and I couldn't get it loose. I ended up removing the whole thing from the linkage below. Did yours just spin off? Mine wouldn't budge and I figured it must've been pressed on.
I just tried mine. Tried spinning it by hand and it was really stubborn so I grabbed some channel-locks and it popped free, but I think it was glued. Now it's stripped (spins freely) but it still won't come off at all. Maybe I'll just get out the Dremel and cut it off and see what the shaft actually looks like.