I had the six-speed. I did find that when I was descending a long series of hills: I would sometimes end up dropping down too many gears. (every tap of the brakes yielded a downshift.)
So I would re-set everything by turning Tow/Haul Off, and then turn it back on. That would start me back out in Drive, and I could repeat the process as often as was necessary.
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
"History shows again and again; how Nature points out the folly of Man!"