Constant irritant since I purchased the truck in January of 2021. I already took it in for the shutter which they changed transmission fluid and has seemed to help the shutter but the erratic shifting still remains. It is most prominent when the transmission fluid is cold or warming up. Erratic shifting in lower gears and noticeable clunking when downshifting to lower gears when coming to a stop. That problem has never gotten any better. Can't imagine what that must be doing to the inside of the transmission.