Wow an 1100 pound increase in towing with an additional 10 HP and the new tranny.

Just think if they would have added another 30-50 HP to the F150. Ford could have eliminated the F250 and F350.

 

If the new tranny has an extra low first gear, and with more speeds im sure it has, then, yes, it can theoretically pull a heavier trailer because of the extra torque multiplication.

The main reason for buying a SuperDuty should be for extra payload in the bed. For towing with the 5.4, a lighter F-150 will have more towing capacity. No diesel or V-10 for the F-150 means that the "properly equipped" SD still can pull more.

Jim

 

Here is the new 6spd gear ratios.

1st) 4.17
2nd) 2.34
3rd) 1.52
4th) 1.14
5th) 0.87
6th) 0.69
Rev) 3.4

Compared to the old 4spd gear ratios.

1st) 2.84
2nd) 1.55
3rd) 1
4th) 0.7
Rev) 2.23

The new 6spd trans and frame improvements, as well as the trailer sway control and trailer brake control are the items I see as the reason for the increased towing capacity.