MEXICOWANDERER wrote:
Keeps the transmission out of top gear. Unless I lived someplace where a horizontal discharge of a 155 mm howitzer could travel 25 miles, I would eliminate top gear while towing. You can prove this to yourself with a transmission temperature gauge if you wish. Newer transmissions have gotten crazy expensive to rebuild.
Sorry Mex, but that is an incorrect "answer"..
Contrary to popular belief, Fords Tow/Haul mode does not lockout ANY "gears", especially with that transmission.
Tow/Haul alters the transmissions upshift and even downshift points and habits (IE shifting strategy)..
Additionally it engages automatic DOWNSHIFTING which is pretty darn cool, you do not even have to touch the brake to initiate a downshift.
If you do feel the need to downshift you can tap the brake pedal and the transmission will automatically downshift to the next lower gear (provided it is safe for the transmission to do so).
Tow/Haul is designed especially to be used anytime you are towing or hauling heavy loads. Gets rid of the need to manually move the transmission lever to downshift when going down hills..
An extremely nice feature, use it and you will be glad you have it.