I have an '11 f150 with 3:55. I tow a travel trailer that is 6300lbs all over Michigan. You will have no problems. I haven't used that motor but I would image it will do just fine. If you pit tires on before you retire the truck I would definitely agree with the post above about E rated tires they make a world of difference.
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R.J. and Ginger
2019 Ram 3500 6.7 HO, Aisin Trans 3:73
Reese Goosebox
2019 Sandpiper 379FLOK
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