EcoBoost and 3.31 gears
10-24-2015, 07:07 PM
#21
Senior Member
Thinking about going with toyo Mt's 295/70/17's @ about 70lbs each, about 100lbs total combined heavier than my stock tires with my 3.31 gears, ecoboost. Not sure though if I should or if I should just go with 285/70/17 bfg ko2's (about 12lbs each heavier than my stock tires. 48lbs heavier total
10-24-2015, 08:07 PM
#22
Senior Member
After having 4 trucks with the 3.55 gears, I bought a 2014 set up exactly as my 2013 except for 3.31 gears. Hoped for better mileage. No dice this truck is no better then my 3.5 and is a lot worse on mileage then my 2012 Ecoboost with 3.5. All the last three were Ecoboost set up exactly the same. Would rather have the 3.55. I am a stickler for mileage and keep track of every tank on paper for all my last 5 trucks.
10-24-2015, 08:18 PM
#23
Senior Member
After having 4 trucks with the 3.55 gears, I bought a 2014 set up exactly as my 2013 except for 3.31 gears. Hoped for better mileage. No dice this truck is no better then my 3.5 and is a lot worse on mileage then my 2012 Ecoboost with 3.5. All the last three were Ecoboost set up exactly the same. Would rather have the 3.55. I am a stickler for mileage and keep track of every tank on paper for all my last 5 trucks.
Ok....... What size tires you running with the 3.31 gears?
10-24-2015, 09:50 PM
#24
Senior Member
After having 4 trucks with the 3.55 gears, I bought a 2014 set up exactly as my 2013 except for 3.31 gears. Hoped for better mileage. No dice this truck is no better then my 3.5 and is a lot worse on mileage then my 2012 Ecoboost with 3.5. All the last three were Ecoboost set up exactly the same. Would rather have the 3.55. I am a stickler for mileage and keep track of every tank on paper for all my last 5 trucks.
How much city driving do you do vs. highway? The lower gears should do better in city driving (less throttle to get the truck moving) and the higher gears should do better on the highway.
10-25-2015, 06:25 AM
#26
Senior Member
This truck set up exactly the same, only does 18 on this trip and 17.5 lifetime mileage at 16000 miles
10-25-2015, 04:43 PM
#27
Junior Member
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I have 2014 screw cab 4x4 with and this truck is a beast!..really don't care about gas mileage!16.1 is what I'm getting and I'm fine with that!best truck I've ever had..ecoboost!!!!!!!
10-26-2015, 07:21 PM
#28
Happy Camper
I was about to add a trans cooler, tbc and 7 pin plug but that got put on hold till end of summer. My truck has the 3.31 gears and no tow package, was kinda pissed at myself for not getting tow package but all well, is what it is. I'm only going to be towing around 5k travel trailer one or two times a year.
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Sirikenewtron (10-26-2015)
10-26-2015, 07:34 PM
#29
Senior Member