ive pulled 21,000 880 miles with mine.... 2011 F250 3.31 gears srw.... when i was still bone stock, locked it out of 6th gear to keep rpms up some and it didnt miss a beat, got about 10 mpg....
hauled 20,000 800 miles but with 35" tires, h&s tune on hot, and afe intake.... locked out of 6th on mountains because i could only go about 65 mph with the load for trailer to stay steady and got 12.3 mpg
these trucks are tow beasts and mine laughs at even the 20K loads, if you got good trailer brakes i wouldnt be afraid to haul 25K+ with one honestly.... a 1 ton dually would prolly pull bout as much as a semi! LOL
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