Tow haul mode?
Pulling 10,000 lb fifth wheel with f350, 6.4 deisel.. do you have to always use tow haul mode even on flat interstates?
Forum Discussion
You don't have to, but it is advisable. There is a section on this in your owner's manual. It's not just uphill, either, it is every bit as useful, maybe more so, going down hill. Even on Interstates.
