I am sure this has been discussed before, but who uses it and how? I have a 1 ton diesel dually and will be towing a 5500 lb (dry) trailer. I am assuming it will lower fuel economy? Am I correct in as...
I have a 2009 Ford F-250 v-10 and my Tow/Haul button does not lock out overdrive. I still use all 5 gears. It just changes the shift points and provides good engine braking. I use it all the time but not sure if really necessary when on flat land.