So I have a cherokee with 3.55 gears and 32s and a 4.5 inch lift. I plan on going with 4.56 and a lunchbox locker on fron and I will go to 33s after these tires. But how would it affect my MPG. If anyone has this setup let me know.

 

Source is Bing images searching gear ratio chart don't know how accurate it is but according to the chart you'll get good performance and bad mpg.



Also check out this site I found:
https://tiresize.com/gear-ratio-calculator/

 

That chart is for third gear. I wouldn't reccomend taking it seriously.

 

32s with 4.56 at 65mph is about 2300 rpm in od.

http://go.jeep-xj.info/HowtoSpeedoGears.htm

 

Thank you for clearing that up, like I said not sure how accurate it was, it was just the first thing to pop up in the search.

 

Here is a vid I did.. In this vid AW4 auto 4.56 32" tires.. I have 33" now.. but with the 32" gas usage was fine..No I didnt do all the math to find out lol But it wasn't bad at all..

I left the Jeep in OD for the whole vid.. I was showing RPMs for someone..




I left the Jeep in OD for this whole run..

 

Good vid man thanks

 

With the 4.56's and 33's I can get about 16-17mpg the way mine sits loaded up.