Freightliner RV chasis manual says climb at 2000. What goes up must come down. What is the proper downhill rpm? Does using an engine brake change the desired rpm range?
Nothing directly to do with rpm on the way down, but one of getting the speed and revs and gear at the right point such that the auxiliary brake does most of the work and all you need to do is use the foot brake moderately-firmly for a few seconds every twenty seconds or so to keep things under control.
Search for "snub braking" here and on the www and read up on the safe way to go downhill.
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