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
lenr wrote:
My opinion--yours will vary: Ford reference only.
Back in the days of the 4R100 transmission with its first gear ratio of 2.71 launch was a problem. When Ford came out with the 5R110 they split the old 1st into 2 ratios with the top 3 gears staying the same ratio. With a new 1st gear of 3.09 launch was improved. The 6R140 went to 3.97; more improvement. The 10R140 uses a 4.615 ratio. It is hard for me to believe that launch would be a problem with any axle ratio.
I have the 6R140 with 3.73, and agree, I have no issue with launch. The 10R should be a stump puller! I have posted before, that where the 6R140 comes up short is the 3.12 reverse. If reverse was 4.695, like the 10R140, it would be a non-issue. I often use 4-low to back my FW up an incline. At least they did correct this, that IMO, was the 6R140s only weakness.
Jerry
