i have a 3.55 and would realy like a 3.00 i drive highway a lot in this truck and get 20 mpg the truck is never loaded so i run 75 to 80

 

how do you get that kind of mpg without being towed? LOL

 

i dontknow it always has it has a 140v idm 15k mod keep the oil fresh 265 75 tires 3.55 gear standard trany custom built cold ram air intake and dont stomp the pedal when i take off

 

o yea no cat no wast gate electric fan 3" down pipe stock mufler it goes next

 

electric fan will deff help, 60 less pounds of rotating mass or something like that? my last truck with 3:55s got that same mileage, however, 1800 is a great rpm to run with 3:55s, if ford did make a 3:00 rearend, which they dont, youw ould be at really low rpms, zero boost and lugging the motor to do 80 so you would have less efficiency on the highway. you pretty much maximized the mileage on that truck. the highest mileage usually posted is like 21 or 22 is really high. if you add a 4" straight pipe exhaust you might be able to bump that up to 21. also a highway econo burned tune on a chip may help aswell! sure helped me when i had that truck.

 

never thought about the weight of the fan like that

 

i plan to put a programer on and rebuild the injecters and hpop soon allso an intercooler and a exeternal wast gate

 

i've got a SUPERCHIPS for sale i will meet you half way

 

thats a long drive i was thinking more on a 6 posion did you say you were giving it away

 

not giving but half price 200.00

 

on the other site dave wittmer runs a set of 3.08 gears. im not sure where they are from but he said he thought they were discontinued. i wannted to get a set too. im sitting at about 19 mpg im hoping that i can get up to 24. im planning to do an intercooler, injectors of some sort and good econo tuning. i hadnt thought about electris fans too, that should help. i think 23-24 is completely possible out of these truck if you do it right. you might use a .89 exhaust housing i think that could help too

 

if you tow an elec. fan will not keep up you will start getting a little on the warm side

 

Whay specifically does this SUPERCHIPS do? Is it better than a preset 6 position chip?

 

it does about 1/2 to 3/4 as a 6 position but when i got i was looking for a firmer shift witch it did and mpg it picked me 3 mpg

 

I looked into this a year ago. Never acted on it cause I have a 4x4 and the front diff looked like a nightmare to change. Anyway I did find as low as 3.08 in the aftermarket. For now I'm running 3.55 with 285/75R16 tires.

The electric fan idea is interesting...

Rory