in 1998 they started putting better brakes on the dodge trucks. i have a 1997 3500 dodge truck and the brakes are a problem with a big load. always have in mind when you are driving that if the brakes go out on the trailer am i going to be able to stop going down this hill.
i bought a new big tex trailer 26+5 gooseneck 29500 gvw trailer and the trailer brakes have gone out 3 times. the first time the trailer plug wiring wasn't tightened from the factory, the second time the trailer wiring harness rubbed through in a section, the third time a fuse blew in my truck.
dont let people rush you going down steep grades. if you do much hill driving you can get an exhaust brake for these trucks.
mine has 355,000 on it and still going good. 120,000 miles is hardly broken in on these cummins engines.