The ecodiesel of Dodge & the new Cummins in the Titan were built for the 10Klbs. range. Dodge, Ford & Chevy all can pull double that. They are considered heavy duty. Nothing wrong with the trucks they were built for a market. People seem to have higher expectations without researching. DEF was due to California emissions which most states & provinces are now bound by. I have a 2003 Dodge dually. It can only pull 16Klbs. I came with no catalytic convertor just a straight muffler. Yet its still one of the cleanest diesels when I get it tested once a year. It pulls my 1998 323 Eagle 5th wheel no problem.
1998 Jayco Eagle 323 RKS Fifth Wheel
2003 Dodge Ram 3500 Quad Cab Dually long box Cummins HO
Andersen Ultimate 5th wheel to gooseneck flip ball hitch