I am considering buying a new 1 ton Dodge 3500 Cummings Diesel with a 6 speed manual transmission instead of the automatic with tow mode feature. I will be pulling a fifth wheel, that when fully loaded probably weighs around 12,000 lbs. I know from all accounts that automatic transmissions have just as much pulling capacity, but they are still automatics, and when pulling alot in the western mountains, they can over heat and maybe a huge expense if you blow the tranny. I have no qualms about driving a 6 speed manual truck, that will in fact give me good gear ratios when climbing and also allow good compression when descending down hills. I know that i am in the minority, and that just about every RVer i meet has an automatic truck.Am i wrong in choosing a standard and should i not worry about tranny problems, if i have an automatic that is fully rated to pull 12,000 lbs?