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...
With a Moho you are HAULING all the time. Put it in TH and ferget it! It delays and sharpens the upshifts, locks the converter earlier and helps with trans temps. It WILL downshift on grades to offer you some engine braking. Assuming you have a V10, that motor is designed to rev. Your computer will make sure it doesn't over-rev. It will NOT improve fuel economy - there will be no measurable difference.