What is a "CUMMINGS" motor? are we talking some sort of PORN here?!?!?! not on a family forum please.....CUMMINS I have heard of, good motor......
RPM and speed is about what I would have expected frankly with your now soon to be old setup. That motor in a 24 series would do the same speed wise. But the pushing on suspension etc would be less.
Trailer brakes may or may not need adjusting. They should not be squishy. May need to be tightened. Then what are you calling steep grade too? 3-5% on an interstate is not steep IMHO. 15-20% in a forest service campground is STEEP! OR a city road etc.
Marty
