Re-gearing with 8 inch lift and 37's for MPG

Hi Everyone!

I just did a ReadyLift 8 inch lift with 24's and 37's with no shifting problems. I should've went with 22's because the37 inch tires for 24's looks too much like low profiles. But anyways, the MPG is garbage. If I re-geared the Tundra, would I do better with gas mileage? Right now it's doing 170 miles a tank. Any help would be greatly appreciated!

 

I wouldn't bet on it, but maybe. Even if you got a minor mpg increase, you wouldn't see an actual return for probably a decade. I would do it more so the truck doesn't feel like a pig, and if you get any mpg increase see it as a side effect perk

 

24s with 37s is not for people that worry about mpg

 

Spend the money on long tube headers. Good chance you'll see a mpg increase.

My >2¢

 

Why you making it seem like I'm a broke ass? It was just a question to see if it would help on the gas mileage smart ass! Even Toyota is making a new Tundra to save gas.

 

Poor Tundra? First off, I ain't got no damn time to do any off-roading but just wait til another Tundra with 24's parks next to your Tundra with 18's. Sit down and learn to be humble!

 

Thanks for letting me know, I'll look into it.

 

No need for pics, it was just a question to see if re-gearing would save gas, that's all.

 

OH NO NO NO NO

 

Please don't post pics!

 

Why would you assume i'm implying you're a broke ass? And where in my comment there's even a slightest mentioning of that? I'm just stating the fact that usually people who do big lifts with big wheels already know that this will massively decrease their mpg numbers and thus are not worried about that. So lighten up buddy and enjoy your truck without worrying about mpg

 

In all seriousness, the best way to save gas with this setup is going to be to get a fuel-efficient daily driver and leave your Tundra at home most days.

Any money you spend to achieve better fuel economy on the Tundra is going to take months or years to recover that cost in fuel savings.

 

I wouldn’t want to drive my truck on 37’s with stock gearing, but then, there are hills where I live.

I’d say a re-gear is a must for that setup, and any L’s/100km that are lost is a bonus.

 

Did you factor in the difference in tire size when you were calculating mileage?

 

Does, "24s with 37s is not for people that worry about mpg" answer the question of me trying to save some gas mileage? No! I had zero intentions of lifting my truck. Just wanted some new tires and call it the day but then saw an ad on FB Marketplace for some 20's with 35's for cheap. Bought it, didn't fit, had to put a 3/1 leveling kit to make it fit but got annoyed at how small the rims looked so ended up putting a brand new 8 inch lift on with 24's and 37's. Luckily I didn't go with the Bullet Proof 12 inch lift with 24's and 40's! First time doing a lift on any of my trucks and had no clue what I was getting into. The Tundra is used for picking up supplies in the morning 7 days a week then dropped off to take the Tesla Model 3 for the rest of the day. Please keep your smart comments to yourself.

 

I had no clue what I was getting into.

 

My comment was not "smart assed" but was serious advice. The Tundra chugs fuel without adding weight and decreasing aerodynamics... you did both of these things. You can spend a few thousand on headers and get a small improvement but it's going to take you 4 years to make that money back in fuel savings.

Maybe just get used to it or drive the Tesla more. Good luck.

 

Also regearing isn't necessarily going to net better fuel economy..

 

MPG concerns should be emotionally reconciled before even buying a Tundra. That ship has sailed.

 

I have nothing else to add.. You win buddy

 

I'm saving his post for "copy pasta" for use at a later time.

 

I actually want to see your set up im sure it looks mean!!

 

X2

 

Not gunna lie this guy seems a little sensitive. @14CRWMX is right doing a lift and big ass tires to me means you aren’t to worried about mpg. And if you did the lift and tires without knowing what you were getting into then you must have some serious $$ to spend that much without knowing what you are getting. But to be honest worrying about getting good/decent mpg is out the window by now. No truck you get with a 8” lift and 37s is going to be good at Mpg’s

 

To answer your question, you probably won’t see significant improvement in mpg with a re-gear but it will make the truck perform better. On , another note, if you’re wondering why some are less than sympathetic to your problem, it’s because they assume a person of average intelligence or better knows that an 8” lift with 37s will have a substantial impact on efficiency.

 

The answer is No.

The lift doesn't make a lot of difference in mpg's. A re gear will make it better on your drive train. I had 4:30's and went to 5:29's, very happy with my choice, my truck runs like a scalded dog. MPG's were never a consideration for me though

 

Thank you so much for the info.

 

I honestly can’t figure out how someone goes from “a sweet deal on 35’s on 20’s” and then jumps the shark to an 8” lift with 37’s on 24” rims. I can’t imagine anything bigger than 20’s even looking “right” on 37’s (and anything bigger than 18’s looking right on anything smaller than that). I just keep thinking of something like this.


On a more serious note, your 37” tires are 16% bigger in circumference than the factory tires. So for every mile you register on your odometer, you are actually traveling 1.16 miles (your speedo is also reading 16% slow). Your 170 miles on a tank is closer to actually 200 miles of true miles traveled. So that should figure into your mpg calculations.

But, at the end of the day, you took a vehicle that gets ~15 mpg with a tail wind on a downhill and you just added a ton of weight, destroyed the aerodynamics, and fucked with the rotational torqur required to turn the wheels. A regear might help with tweaking that last bullet point, but it’s not going to be a magic bullet. Might start thinking about a supercharger to get some more HP into the mix as well. And the headers. And a custom tuned exhaust…

Or look for a diesel F350…