Would your mpg be the same as stock or close to stock if you put a lift and bigger tires and changed the diff ratio to compensate for the tires? Also has anyone done this, if you have could you post your mpg?

Hey, I have a 2006 LLY EXTcab 8 foot bed, and i just had a rcd 6 lift with 17*9 and 34 tires. Well its been 2 days, and my gas went down the tubes. I didnt look into the rear getting changed yet, But im hoping when the new edge comes out ill be able to change somethings around to get better mpg.

With a d-max, you shouldn't have to worry too much about changing the ration unless you go bigger than 35's. Mileage and power will still be comparable, IMO.

When you lift your truck you create more areodynamic drag and the larger tires have increased rolling resistance........ so technically, even if you changed your gear ratios such that the new ratio compensates for the tires and approaches your stock setup in terms of rpm & vehicle speed, you might still see a loss in mpg due to the added drag. How much, I don't know.

DEWFPO

You guy's think a chip will help with MPG

I called the dealer where i got my truck, and they said they could recalibrate the computer. But they said the speed would still be off alittle

i think its a waste to get the gears swapped. ive seen big tires (40") on a truck that had gears swapped and didnt see much difference in mpg. my opinion i think once u go big. mpg dosent matter anymore. its a sacrifice

Big tires and a high truck equals a lot of resistance to rolling and the wind. When you pull an enclosed trailer the wind resistance makes more difference then the weight. IMHO

A gear change may not affect your MPG because of the rolling resistance mentioned above. However, it will allow you to put you motor back in it's origional power band which will help your engine if nothing else. Also, you need to check on recalibrating your computer for the different gears. You don't want to be putting on imaginary miles or for your speedo to say your going a different speed than you really are.

I'm actually trying to find out how to recalibrate my system to go from 4.10 to 3.73 gears. Didn't have any luck in the tranny section. Hope this helps.

I used a programer to get the spedo right ( the last speed sign said so )
I am getting about 16 around town and get 18/ 19 if I keep the speed down on the hwy 65mph

Which programer did you used?

I hope your not talking about mpg figures from the onboard computer on the dash? If you don't get your speedo re-programmed your mileage will be less than what you're actually traveling, thus when divided by the amount of fuel used (which will still be accurate), you'll have a much lower mpg reading than actual.

Hey, where do you get one of these programmers. For say a 1995 with a 6.5 TD?