Ok..let me rephrase. You have more gears to play with driving the same speed. For example. with the 3.21 you will likely be stuck in 5 or 6 while cruising on the highway. At same speed with 3.92 you will be in 6 to 7. Gears are closer together and you have 'more gears'. Why do you think Ford went with the 10 speed????
Obviously its still just a 8 speed, but if you never get to 7 (or 8) because the motor needs to run 3k+ rpms to keep the load moving then gear changes will be easier (and you don't have to spin up the motor to compensate on the torque loss from reduced RPMs created by a lower gear ratio).
I don't like the 3.92 in my 2020... don't tow and don't need it. I liked the 3.21 that was in my 2019.
Can we swap everything out? lol
I’ve got the 3.21s. I’d be willing to swap anybody for 3.92sYes. As long as by "everything" you mean everything between the front and rear bumpers, inclusive... LOL
I feel the same as you. I have 3.92 gearing and that is the only mechanical thing I would have preferred to be different when I bought my truck. I had an '09 with 3.92 that I traded in. I really thought between 10 years of refinement of the engine, going from a 6 speed to an 8 speed transmission, and adding e-Torque, I would see an actual, meaningful improvement in mileage. That is how I convinced myself to get another 3.92, instead of holding out for the right truck with a 3.21. Instead, I get exactly the same as what I got in my old truck (as far as I can tell).
I do love my truck. But, for what I spend at the pump, I feel like I should have at least 50 more HP to play with.
If you're looking to gain mpg the problem is increased weight. 38 inch tires will likely be twice as heavy as a 32 or 33, at over 80 lbs per tire. Mpg's will approach single digit even with the higher ratio. You have the right truck to do it though, it would be awful to have 38's with a 3.21So I can go up from 32 to 38 and that will convert mine from a 3:92 to a 3:21... neat... gotta try it.
I've already gone up to a 33, so I am at 3:80 right now... this is so cool.
The 3.92 effectively gives you an extra lower gear and the 3.21 effectively gives you an extra higher gear.8. The only thing that changes is the size of the gears, not the number of them.