Don't forget that Ford does not rate this truck nor any of there trucks to tow a specific amount. IE in this case it is not a will tow 7500lbs, but instead a WILL TOW UP TO rating. If you have a heavier truck (supercab, 4 door, 4wd, etc) or more people / cargo, then you can pull that much less in trailer weight.
Everytime you see a ad touting that this or that truck will tow a specific amount, it is always noted - "as properly equipped with" AND "is noted as a will tow up to"... and if you research a little farther, in normal instances it is a two wheel drive, regular or smallest (lightest) cab available, NO cargo and only the driver that the maufacture uses to show that it has the highest rated tow rating.
90 F250 7.5L E4OD, 03 F350 SD auto with the infamous diesel 6.0 for work, 70 C600 330 MT40 auto dump truck O2 Oldsmobile Bravada, Kubota L3200, Hustler Super Z mower, all Hydrostatics, 85 Honda Elite 250 & 150 scooter CVT - Nary a manual in the fleet!