stock 2012 gearing


regeared 2012

 

Are you using a Gear App or a website to do the calculations?

 

How about showing what 4.10 ratio and 37" tires and 32" with 5.13 would be?

 

I would not regear the new drivetrain. I had 37s on my 12 jkur with auto and 4.10. Power was good, mpg was great and i never downshifted on the interstate. Dont know what else you can ask for in a jeep

 

I have a 2012 JKUR auto, 35" KM2's, and had 4.10's stock. I drove it this way for 3-4 months and it was OK, but the power wasn't what it was stock. Even properly calibrated with a Procal, it never felt like it was in the right gear and the tranny was constantly hunting for the "sweet spot".

I had it regared to 4.88's and WOW! It's much more drivable, especially around town, and the tranny isn't always shifting between gears to find the "right" RPM.

Sure, the 3.6 has enough power to pull the 35's without being re-geared, but why sacrifice the power? Re-gear it and get back the power you've been missing

 

To have to back to stock performance..
I do have a 2012 JKU with 37's and 4:10's. is it live able until I can afford to regear? Sure. Do I want my stock performance back? Hell yea I do.

I want my crawl ratio back Offroad as well. We have regeared enough 2012's to tell you it'll make a difference. Not to mention save your drivetrain from being over worked.

 

Ok so 2012 auto with 37s your saying 5.13s would be perfect. I was going to do 4.56 cause people where saying with 4.88s at 70 they where almost at 3000

 

Yellow is minimum, green is acceptable and blue is performance... 4.88s and 5.13s are pretty close, just depends how much crawling u plan on doing vs daily driving...

 

as mentioned the difference between 4.88's and 5.13's is minimal. I would go with 5.13's

 

Ill do a lot of highway driving to my crawling destinations which are 3-7 hrs away. My rim tire package 37 nitto mud grapplers atx slabs weigh about 140lbs does that bring it down a lot.So would I be better off with 4.88s I'm just trying to get this done right the first time. Thanks for any help.