Tow Haul Mode
I have a F350 4x4 long box diesel. I always used tow haul when I towed our fifth wheel. We have now downsized to a tow behind TT. The friends we camp with have TT and they never use tow haul beca...
Forum Discussion
City driving there might be a small difference in mpg as it holds lower gears longer to improve performance. Once on the freeway and up to speed and locked into top gear, it won't make any difference. I typically avoid city driving and have never noticed a difference in mpg.
Where it really makes a difference is in the mountains. Avoids hunting for gears which can be hard on the transmission and will help downshifting on downhills for a more comfortable and safer drive. You could leave it off and manually force shifts but why?
One of the guys had to replace the transmission on his F150 he blamed the mountains. I bet he was not using tow haul while driving in the mountains.
That tells us nothing. We don't know if he was using tow/haul or not, we don't know what he was towing, we don't know how bad the grades were, we don't know if he maintained the truck, etc....
