So I am able to use manual mode and get to 49mph with smooth shifts with -29, in auto it shifts at very very high rpms a little rough but not awful. I really don’t know what to do.. I 9/10 times use manual mode anyways but I’d like the auto to work correctly tooThe only changes for the 17, 18, 19 is the addition of auto shift. Maybe these are more temperamental about the speed/rpm/gear selection. If the dash isn't showing an error your close or good to go, you could fine tune if by moving in .5% increments and see if it gets better or worse.