Comparing axle ratios
Well I put this off for too darn long and am now looking at 2017's. Today I drove an F250XLT Supercab, with the 6.2 gas engine and 3:73 axle ratio. I also drove a GMC SLE 2500HD double cab with the 6....
Forum Discussion
CampingN.C. wrote:
My buddy pulls a 32ft tripple slide with a 6.2 and 3.73's. However he has 35 inch tires which kills his final ratio and it still pulls good. He gets around 7 mgp towing.
It would be really interesting to see what the new Powerstroke would get for mpg pulling that trailer.
I think it's hard to know which final drive to choose. For 2017 Ford has put a lower first gear in the transmission that gets fitted with the 6.2 liter. They also increased the torque of the 6.2 so with 3.73 gears and 34" tires you could drop to second gear and have 310 to 385 HP available between 45 and 65 mph. So second gear would work excellent for steep grades. On the flats at 60 mph with 3.73 gears and 34 inch tires you could lock 5th and 6th out, if desired, and cruise at 2580 rpm or just 6th if it works and run at 1900 rpm.
