When going down hill I use the tow haul mode weather towing the toad or not. if you hard tap brakes tranny will down shift if that is not enough hard tap again until you get to speed desired. Tranny will hold in that gear until you give gas and then will shift up again. On long grades I slow down at top so I can control the speed starting there don't wait until you going down to fast then start trying to slow down. If you need to use brakes I apply hard to get down to speed desired and let the tranny work after that don't ride the brakes. It's easy once you get use to your coach and controlling the speed.