I have a 03 Ram purchased used, 3500 4X4 6 spd with 225000 KM on it. I'm an X long haul trucker so know how to use a standard trans. It was used to pull a 26' 5th wheel (not on a reg basis) and now I pull a 33' 5th wheel and gross 20,000 lbs.
The trans gets very hard to shift when hot. Also...