New F-150 with 13,200 lb tow rating!
I just purchased a brand new 2018 F-150 Lariat with the 3.5L Ecoboost motor a couple nights ago. It has the max tow package and the 3.55 gears giving it a tow rating of 13,200 pounds! I used to have...
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The payload on my truck's door jamb says 1,464.
That a very low payload so most likely (assumption) your truck has a 3800 RAWR. RAWR is what carries most if not all the load on the bed and hanging on the rear bumper. RAWR is on the drivers side door post certification sticker.
No doubt the 3.5 EB engine has enough power to tow 13200 lbs however your truck doesn't have enough RAWR to carry the hitch load from a RV trailer that size.
The F150 has 5 different rawr packages from 3350 lb up to 4800 lbs.
The 4800 rawr would have no problems carrying hitch loads from a 13k TT.
You have the truck so load the truck and drop by a local CAT scale and get the trucks separate front and rear axle load numbers.
Now look at trailer's that the loaded hitch weight plus all the other necessary stuff that you carry in the bed doesn't overload RAWR = tires/wheels/rear suspension.
