Originally Posted by boatman
Question when those of you who are towing with a newer gas truck can you run with the cruise control on or do you have to anticipate hills so you can give it some throttle before starting up a hill. Ok
I use the cruise control on my RAM 6.4 gasser along with the tow/haul mode. I find that without tow/haul engaged that the transmission does a lot of bouncing back and forth into overdrive and/or eco mode. I don't use cruise when I'm in the steep mountains, just because I choose to move over into the truck lane and burn less gas going up the big hills. With my <9000 lbs camper, the RAM 3500 6.4 Hemi doesn't need any run-up.
Cruise will help control the speed going downhill if the slopes aren't too steep as well. I've also found that even though it isn't an exhaust brake that the computer controlled engine brake (downshifting) in T/H mode if I tap the brakes a few times out of cruise is helpful.