I can confirm how bitching the 6 speed in the dodge is......great tranny, sucky motor. I ended up hauling the company trailer with a 2012 duramax dually......good power, good tranny.....my only dislike about the duramax is that it sounds and feels like a gas motor.....To me the chevy trucks have always felt very "car like".....As far as the fords go.....
Love all the engines from 7.3l and earlier but hated the automatic trannys......I wish the 6.0l never existed but the 5 speed automatic was pretty good.....the 6.4l that they came out with had good power but was very fuel thirsty........this new 6.7l is super powerful and the tranny is awesome....but they are expensive and you have a complicated nightmare under the hood.
By the way, every truck I am speaking of I have driven and towed with......I am not going off of "tribal" knowledge, or "I heard from a buddy" crap.....