I have looked at the charts and read many threads on this, but it seems like logistics may play a part in the choice of gearing and 37`s? I live in Minnesota and have a 2013 JKUR and am installing the lift and KO2 37`s hopefully this weekend if the lift opens up. I drive some freeway and pull a small 2000 lb trailer on occasion. Between 4:88 and 5:13, what would be a better choice? I don`t ever plan on going bigger, and I would like good drivabilty and if it is possible 15mpg range.
For those in the know, 37`s and gearing?
- Thread starter bowtech50
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Spudcannons
New member
I would do 5.13's since you tow. I bet you do a bit over 15 mpg with them too.
07JKSahara
New member
5.13 for sure.
Spudcannons
New member
Unless you have a D30 up front then the pinion will be too week.
07JKSahara
New member
Good point, it says JKUR in his question.
Spudcannons
New member
Woops! :crazyeyes: I would say rear drive shaft too since you tow.
I have a 13 (manual), 37s and 5.13s and love them. While 4.88 works out to a mathematical equivalent RPM wise for the 37s they need more power to get them rolling. I think you would regret the 4.88s. Especially with some towing.
As far as MPG goes, It will be directly proportional to how fast you drive. I get 19-20 at 60 MPH and 16.5-ish at 70 MPH.
As far as MPG goes, It will be directly proportional to how fast you drive. I get 19-20 at 60 MPH and 16.5-ish at 70 MPH.
Kickrocks
New member
I am running 37 with 5.13s but not seeing the MPG as great as you do. I get an avg of 14.4mpg. But I do love the setup.
CandAMudders
New member
37s with 4.88...I don't tow and have a stock front axle. I put in a RIPP to give some extra oompphh (that is a technical term).
