I have a 2006 F-150 XLT Supercab. It came with the 5.4L engine and the towing package and 3.54 axle ratio. The manual says it can tow up to 8,400 pounds max. I just bought a 35' travel trailer that says it has UVW of 4,750 with a maximum allowed weight of 7,100 pounds. My truck handled the pull pretty well in our first short trip but I live in Georgia and didn't challenge the truck in the north Georgia mountains yet. I turned off the OD and kept my speed around 60 mph. I can tell from the way things went that heading to the Yellowstone country will probably not work if I don't find some way to up the HP and torque. Has anyone tried the Banks Power Pack system to increase the overall power. Banks claims they can add up to 45 HP and 45 ft. lbs. of torque. Would that be noticeable and/or helpful? Any thoughts from would be appreciated.

 

welcome to FTE. that is A LOT of weight for a F-150.
and their ad says it can add up to. not will add.
i don't know what all is included in the power pack, but i really doubt it will do what you need.
if it was me, i would get a bigger truck.