I did a search on this subject and did not get much of an answer. So I am asking you folks who probably know more about the subject than any other place on the Internet. Here goes..... When I got my F...
Contrary to popular opinion, my suggestion is to keep if off tow haul unless you are climbing or going down hill. On a flat road, there is not need for Tow Haul, which would be like driving in low gear. I have tow haul on my e450, and I only use it during those conditions. Do not, I repeat, engage Tow Haul at high speeds, because it will be like putting it into low gear at 50 miles per hour and you will get a very abrupt slow down.