Cap9709

Im currently running 35's with a 6" lift and while I didn't buy the truck for the MPG I figured it would average better than 11 lol. Wondering what MPG anyone else with 35's is getting. I also have 3:55's and im going to re-gear in the future but not sure what I should go with. 4:10 or 4:56. Anyone running that setup and what kind of MPG are you getting? I also tow a lot during the summer but at the same time spend quite a bit of time on the highway. What do you guys think?

NWfreerider

4.10s and I average 16 MPG.

phissure

OP did you have your ecu recalibrated for the new tire size? If not your speedo will read slow and show lower than actual mpg.

Steve_P

6 inch lift with 3.73 averaging 14.5....would be better if I didn't drive in D.C. traffic everday, which is either a parking lot or a drag race.

ThomasM

2 inch level 35x12.5r20 mud hogs getting around 13.8-14 2010 screw fx4. I haven't adjusted anything in the computer.

Cap9709

I have yet to reprogram it. Good to know though, but as far as a re gear I kind of want the 4:56's but the only thing making me not want them is would they be bad on the highway? Or would that make it more like a stock truck with 3:73's?

hillclimber

I have the same setup with 4.10's and a tow tune and I'm getting 15 in town and 19 on highway

fishbones182

If you haven't adjusted your computer the mpgs your truck is giving you is way off.

fishbones182

They won't be that bad. If your concerned about highway mileage avoid the larger tires. The more aggressive the tread the less mpgs also. I'm running 35 swamp boggers with a 3.73 gears and average 14.4 on the highway.

GreyFX4Eco

Honestly I think raising the gears will either hurt your gas millage or change nothing at all. Our trannys have very short gears to begin with... previous generations were a different story. I have 35s and I would tell you my gas millage is 15 going 70 and 18 going 55 but I have yet to reset my speedometer.