I have a 35ft 2014 f53 chassis. I have never used the tow haul mode but once and didn't much like it. Do any of you run it all the time? How does it work going up hill? I tried it going down hill and ...
If you think about it, it comes on most of your trucks and vans. It's their to assist those vehicles with heavy loads. Your motor home is a heavy load all by itself. You should have it turned ON, unless you're driving on flat level highway, and ON all the time if you're towing. As stated, it will extend the life of your transmission and has very little effect on fuel economy