Its weird. Sometimes its smooth as silk, other times it binds up. I hope its not transmission internal - but my gut says that is exactly where the problem is. The moving parts inside the gear selection process.
All other transmission function seems normal. Sometimes some grinding or clicking when going into park. No slippage or burnt fluid.
This tranny received a horrendous beatdown during the one big wet winter snow we had. I had it stuck a couple times and had no option but to rock it out of its tracks. Not ideal. The first binding I experienced, happened during those sessions...