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
laknox wrote:ib_leblanc wrote:
Pulling 10,000 lb fifth wheel with f350, 6.4 deisel.. do you have to always use tow haul mode even on flat interstates?
I can't speak for the Fords, but on my Allison, TH mode bumps up the shift points to a higher rpm and locks the torque converter sooner. It also engages auto-downshift. If I'm towing on the flat, I'll turn it off as I approach my target speed (usually around 60 mph) so it will hit OD sooner, then turn it back on to to handle any grades. YMMV...
Lyle
This is how the 6r140 behind the 6.7 Powerstroke behaves as well. Even when towing 30,000 lb trailers I seldom use T/H. I use it when going down a steep grade if the grade is long enough that I want the engine to brake and when driving aggressive and desiring the higher rpm shift points.
