Looking for first hand info towing with the new 2500 HD wIth the 3:42 rear end and 10 speed tranny. Has anyone trying pully steep grades with this setup? I currently use a 2015 2500 HD LTZ and have been very satisfied with it. Looking to purchase a new truck and leaning towards a 2019 as I know the set up. I am afraid with the new setup it will not pull mountains as well and the tranny will be constantly shifting. Also as a follow up...is the fuel MPH reall improved with this setup? Last time they did this to the 1/2 ton gas the mileage actually went down a bit in real life.