Have any of you changed you CVT fluid and needed to relearn/reflash your transmission? In talking with my dealership they recommended waiting till 100k and changing the fluid. They said it's necessary to do a protocol relearn/reflash process with the fluid change. Their quote was $450 for everything. I thought modern transmissions relearned on their own after going through the gears and a driving period of time. I was thinking of doing it myself and have read quite a bit on the procedure--but the need for a protocol relearn/reflash was a new one for me. What are thoughts and experience with a CVT fluid change with or without a relearn/reflash?