Have 31s on stock gears and want to upgrade to 33s but don't want to lose mpg at 33s. Which ratio would I need to get the best mpg and power while running 33s?

 

Regear !

 

4.56 or 4.88

I think 4.56 puts you close to stock power band, 4.88 gives a bit more grunt.

 

^X2, and the difference between those gearing sets for MPG is minimal with a semi conservative driver

 

www.grimmjeeper.com.
Use the gear calculator.

 

4.10s and 33s is just a little less than stock gearing, optimal gears for 33s to put it back to stock powerband would be 4.27s. 4.56s are good for upto 36s i would imagine.

im putting 4.56s in mine this weekend finnally after 5 yrs and im on 33s but fixing to go 35s.

 

back when i ran 32"s i regeared to 4.10 and currently have 31"s with that. i wish i would have done 4.56 with the 32"s cause 31"s seem small on my jeep. i would like to go up to 33"s.

 

Auto or 5-speed?

 

Auto 4.56, Manual 4.10