I can check my own codes. There are none.
It has done this after being driven 200 miles and stopping for gas so it is not just an issue of warming up.
Even when cold it goes into gear immediately. It just seems to slip and crawl along for say, 25 feet, then it catches up and accelerates normally. Sometimes it will do this one time. Sometimes it will happen several times a day, even after warming up.
I would hate to replace the transmission unnecessarily if it could be caused by something relatively simple. I also can't believe mine is the only one that has had this problem.