Have a 2012 Winnebago 35' Vista. I have found that when it downshifts once that I hit coast button several times. If it is a steeper incline I might have to hit coast two, three or four more times depending on grade. I remember how many time I hit coast and when I crest the hill and tranny shifts up to fifth gear, I hit accelerate button the same number of times. After a while you get a feel for it.