I know there are a few on these boards that are running Ford v10's as their tow vehicle. I have a 2008 3v v10 with 4.10 gears, Crew cab short box with 74K miles on it. It's my daily driver in the winter only otherwise I have a car for commuting. My question is how many people with the v10 are running a tune? I see on other Ford forums that 5 Star Tuning get's a lot of attention. We are flat-landers in MN so it's a haul out west and I notice I'm right on the cusp between 4th and 5th gear quite a bit, ie we set the cruise at 70-75 and it will downshift to 4th pretty quickly as we get towards the western edge of NB or the Dakotas. If you goose the pedal just a bit it will shift back into 5th and hold it. Love the truck and motor just curious if anyone has done a tune that would keep it in "OD" more often than not which would help with mpg, even if it's only 1-2 :face-icon-small-hap We pull a R&R 27' inline triple axle aluminum trailer with 3-4 long tracks but trailer GVW is 5K lbs so. Maybe it's just the nature of the beast which is ok with me, just curious.