I recently found a ton of slop in my shifter. Turns out it was at the tranny end of the shifter. The nut that goes to the clevis and bolt was really loose. It's amazing how much slop that little nut can cause. It's an easy check then condeming the bushings at the shifter end. I've also replaced the bushings at the shifter end. I don't know how everyone else changed them but I found on mine that a pop rivet was holding in one of them and I had to drill it out in order to replace that one. A new pop rivet went it to resecure the new one. Good luck finding your problem.