i have a 2012 6.0 vortec 6 gear trans that can be controlled on the shift lever . i drove truck and now how to use gears and rpm to run hills . i get a lot of comments on the ford about down shifting ...
That "new" transmission is what they have been using in Super Duty (F250 through F550) and Medium Duty (F650 - F750) for several years. It has proved to be bullet proof.