new Ford 7.3 gas with 3.55 axle ratio, does it work?

I lucked out and found a 2021 F250 with the 7.3 gas engine,10 speed, 3.55 rear end. It got extremely good gas mileage coming home from 100 miles away. It's almost like it was making gas. It just does not seem like it will have a problem hauling my Laredo.