hmmm. 2300-2500 at what speed? Yours a 2012/13?

 

kh202....4.88 is the worst advice ever.

I have a 2012 Auto Unlimited with front bumper, winch, and 35" KM2s. I put my deposit down and am regearing next week to 4.10s. Its the perfect gear for 35s and mixed wheeling and hwy. They cost more as they only come from Dana.

My buddy has the exact setup I'm going to run and he is at 2500 RPM at 70MPH.

4.56s will put you right at 2700 RPM at 70 and about 2900 RPM at 75.

 

That's about right, I'm running 4.56's in my '12 JKU Auto and that is what I'm seeing. 70 mph= 17.5mpg and 75mph= 16mpg. 4.56's were a good choice for me but to each his own.

 

2012 2 dr automatic going 60

 

What size tires do you have.

 

5.38's and 37" Krawlers... would not change it for the world.

Drove 6 hours to Moab and had no issues...

 

Is that the new 3.6. How was the rpms at 70. Also would the 5.38s be good with 40s too. I was thinking 4.88s for my 37s but wanted 5.13s for when I go to 40s later.

 

Yeah that's a little too much gear for me. Speed limit is 70 on way to work.

 

Nice. Haha maybe i'll just slap the 5.38's on and just get a cheap DD

 

2013, the RPM's at around 70ISH were about (if i remember 2600) The goal is 40's someday hopefully. I originally got the axles with the 3.8 in mind but got a great deal on a 13.

Yea, MPG is not the best, I think I am around 14 average right now. I get better in my diesel truck on 35's. Or I just jump in the wife's VW diesel and get REALLY good MPG... but the JK is a lot cooler....