Now ..they might do a simple revision for a gear swap but i would NOT think so as that changes tranny shift timing and CAN change ignition timing benefits/losses....I would expect they would do a revision for a minor tire change...say 31's to 32's....
Now...with the controller and your STOCK tune...yes you can play with stuff all the time....but a purchased tune will lock after use or be LOCKED when you install it. (to keep YOU from screwing up THEIR tune!...lol)

 

This does not look right to me. My common sense with vehicle and gear ratios is that:
3.55 gears @ 55mph is going to get Better Gas Mileage than 4.10 gears @ 55mph.

Are you meaning City Driving or, City/Highway driving combined?

I suspect that I am going to learn something new here

 

You don't always get better gas mileage with lower RPM. You may actually have a wider throttle opening and be operating in a less efficient powerband.

 

these turds do not have enough torque to move the truck when at 1400 rpm doing 50 mph...so you end up a little deeper in the throttle just to get the truck to MOVE.... I can say an instant killer for gas milage....LARGER TIRES.(ie taller gears...lower rpm...less torque)

 

For stopping power go get the front brake calipers, rotors off an expedition front, and your truck will stop a lot better if you are pulling stuff. Works a lot better in the mud after driving one hard there. The calipers are bigger and the rotors are larger as well, but they use the same brake pads. You have to have both as the calipers will not fit a regular brake rotor that came on the f150.

For pulling get the 9.75, 10.25 rear-end as they can handle the load compared to an 8.8 which came in Mustangs and F150 stock. The 9.75, 10.25 are 34 splined axles and not 31 like in the 8.8. You just about had to order these as most dealers did not just have one sitting on their lots and they are five lugs like the stock 8.8.

Best mod if you can get anyone to do it is to do away with o2 and all the pollution stuff on one of these trucks as you gain horsepower and fuel. A guy in Alabama wrote his own program for Ford trucks 97-2003 and the horsepower can go way up as well as fuel mileage. I know of one F150 2002 4x4 5.4 that is bad to the bone and made a Rapture look sick after he got finished with it. He is a funny guy who only will work on some people's trucks. (There have to be others out there who can and knows how)

(Good example of what Ford can do was the 1981 Ford truck 300 6 cylinders that had more horsepower that year than a 302 and got 29-31 miles to the gallon. The 29 was automatic and the 31 was a standard shift truck.) Ford only did this that year on that engine.

You can go to an electrical fan and do away with the fan clutch assembly and that gives you more horsepower of about 5-15 depending I have been told. You no longer have the draw of a fan turning concisely that draws needed horses. Your mileage will go up a half-mile to one and a half-mile more to the gallon.

 

[QUOTE=Stoned Pony1;5263535]
(Good example of what Ford can do was the 1981 Ford truck 300 6 cylinders that had more horsepower that year than a 302 and got 29-31 miles to the gallon. The 29 was automatic and the 31 was a standard shift truck.) Ford only did this that year on that engine.

Good To Know!! I would really like to have a powerful inline 6 and manual transmission. It would be much easier to work on that engine for sure.
Back in the late 1980's a good friend of mine had a black, lifted 4x4 with the inline 6 (I believe it was a chevy though, maybe not) and it was lifted somewhere around 4 - 6 inches and had larger than stock tires on it.
I drove that truck for quite a few miles and was Surprised at how much power that truck had. I am guessing the previous owner had changed the gearing to make up for the oversized tires. That truck felt like it had just as much power as a non-lifted truck with a v-8 engine.

I have only One experience with Handheld Tuners... I used a Superchips on my Stock 2000 Ford Superduty Ext Cab 4x4 8 inch lift 7.3l diesel. That Tuner had 3 positions to pick from. In the High Performance Position, it gave that 7.3l diesel an added 100hp and I believe 200tq. It was a Huge, Noticeable Difference. I drove that truck for 5 years in that High Performance Position before selling it.

 

I happen to know where one of those 81 300 6 bangers 4x4s are setting and have been after that truck and engine for a few years. The man who owned it passed away about 15 years ago and is setting at a friend's house who can't even tag or title it. The problem is his family is and has been fighting over the truck. Nobody knows who really owns the truck now as it would cost more than the truck is worth going to court. His son who had the power of attorney died and he had no will or anything. Messed up the mess even more as two more of his family past away last year. Only about twenty odd more need to pass to get a title.