Ford F-250 7.3 Gas Engine Axle Ratios
Is there much difference in towing milage, and around town/highway mileage with the new F-250 7.3 gas engine with rear gear options? Considering 3.55 or 4.30 axles ratios. Any input is helpful.
Forum Discussion
PastorCharlie wrote:
I prefer my 2000 F350 7.3 diesel DRW to my son's 2017 F350 diesel DRW truck. His is a very great truck and does a great job towing.
The difference is my truck pulls in overdrive where his will drop out of overdrive. So the gears will be either matched in the trans or diff. His truck running empty with two passengers does 70 MPH at 1,900 RPMs. His truck has 440 HP. My truck with two passengers does 70 MPH at 2,400 RPMs. My truck has 235 HP.
The 7.3 diesels can be chipped to increase their HP and Torque without harming the engine if not done so excessively. Perhaps a 50-100 HP increase. A school bus and garbage truck does not need 440 HP therefore the 7.3 is detuned to fit the intended use. Who has ever seen a school bus or garbage truck burning rubber?
My 1987 Jeep Wrangler with two passenger does 75 MPH at 1,900 RPMs.
Credit where it’s due for the OG Powerstroke, but the 2017 is double OD and the new 10 speed is triple OD.
And not a chance that apples to apples an old 7.3 will pull a load in 4th gear that a 2017 6.7 will drop to 4th doing the same.
