Well, I have the short shifter installed. Replaced the coupler at the shift shaft as well. Everything was fine until I drove it !!! First and second sounded like the box was eating itself alive. Third and above were quiet. After I was resuscitated, I dug back into the stuff. Well, it turns out the shift selector rod was rubbing on the vibration damper. Pulled the selector shaft, bent it, and re-installed it. Seems to have solved the problem.
I am told that I’m not the first to run into this problem, and that seems to be the common fix. Is it? Is there a better part or solution?