Ok here are my initial thought on PC after one day of towing roughly 115miles. First sport and sport plus are way to aggressive at least for my liking, pretty good in city mode, tried settings between -3 and +2. Ran most of the day at city -2 was towing 7-7.5K and crossed a mountain with a 10% grade. Truck stayed in 5th gear a lot more than normal, seemed to shift quicker, held in a higher gear better or longer on grades, did the obnoxious 4-2 shift a few times but was a lot less annoying than without PC (seemed to be a much more instant shift with immediate results). Can't tell much difference in fuel milage, if anything maybe slightly better? Overall I am pleased with PC like anything I'm sure I still need to play with settings to see whats best in my application, but would recommend it. Can't wait to find time to have gear swap done then I think it will be assume. P.S. order from Moe's.