Originally Posted by msnyder755
Why have an off mode then people often ask, well there are local towns where engine brake use is prohibited due to noise ordinances.
Actually the Ram Cummins engine has an exhaust brake, not an engine brake, which in theory work quite similar, but the exhaust brake is not prohibitive as are the larger trucks with the engine brakes. The exhaust brake still expels all the energy through the muffler, thus does not create the loud rattle like the big rigs.
Additionally, the exhaust brake will help in colder weather to improve heating up the cab when idling and operating