Correct ax 15 came with 3.07 gears. I run these gears with 33s. I just have to wheel in 4lo all the time. Gas isn't to bad get around 300 miles per tank. That's without calculating for the bigger tires either

 

okay I am completely confused. i want like 32 inch tires or even 32.5 some where round there. do i have to change any gears? i heard that with 32 you dont have to trip at all. How hard it is to trim? Im in high school have a job of 20 hours a week and have to pay everything but the house i live in. Im just looking for best way to put 32.5 tires on my jeep but also have decent gas mileage.

 

Or if i want 33 how much would i have to trim and all? I dont want to take out my inner fenders eather they help with stoping the mud

 

I I were you, I would save for college or other schooling. 33's need more than your basic 3" lift to work correctly. I would grab a set of 31's (true 31's) and run those. You'll be paying less at the pump as well. You'll thank me

 

Go with 31's.

 

Im not going to collage first of all. I have a job at the sheriff center. All i need to know is what do i need to run 32s and not trim anything. do i need new gears? what exactly do i need i dont want 31 i want 32 and half tell yeah truth

 

with out trimming, a 4.5" lift and bump stops. even with a 4.5" lift I would rub with 32's. the correct back spacing is key as well, the less lift the more bump stop. If you don't want a trial/error setup go with 4.5" lift and 4" BS

3" lift with bumps and trimming would be ideal IMO, 4.5" with trimming and bumps is good with 33's. but no trimming then 32's and 4.5". lots of info on this in the build section. it really comes down to how much work you want to do, cutting, bump stopping, researching....

as far as gearing goes... I don't think its worth going to 4.10's. I would wait to re-gear for 33's+ just my 2 cents.

 

How about 4.5" lift with 3.75 BS?
Better or worse.....didn't quite understand much about BS.

Thx....thought op might like to know as well .

 

double post....

 

3.75" BS is only going to push the wheel out of the fender 1/4" more. not a big difference. I only stated 4" because I have a buddy who runs this and seams to work well. I don't think 1/4" would make or break anything...

Back spacing is the distance from the hub mounting face on the wheel to the inner lip.

 

Thank you.

 

have to be open to suggestions and other input, or the help wont be there when you need it.

x2, this will most likely be the biggest you can fit without trimming and or lifting it again.

 

With a 3.5" lift and 31s i get 10 mpg! And it was just tuned up and running great!!

 

sounds like something is way off. i get 16-18 with 30's that measure 31".
try recalculating the miles driven vs the miles clocked on the odometer by doing this. (current tire diameter/stock tire diameter) x miles clocked.

...okay im done thread jacking, good luck murfanator.

 

Didn't say your diff ratio but I would think there is somthing causing poor mileage... I got about 16 with 3.55's and 31's. I get 14-14.5 with 35's and 4.56's....