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5.13, 4.88, or 4.56? (Yes, I've searched)

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Old 12-23-2013, 06:12 PM
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The jk with 5:13's gets 2 mpg better than the jku with 4:10 gears and the op said his is a 2013 also.
Old 12-23-2013, 09:04 PM
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Originally Posted by section8JK
first time i've seen that chart only one i could ever find was the one for the 3.8's but thanks that helps a lot maybe if were to go with 37's with the 5.13's it would be better but not looking to drop that much on tires again thats a nightmare gonna try to stay with 35's thanks a lot
I have a 2012 auto, I say you go with 4.88's just in case you change your mind from 35's and go to 37's. Just regear it once and be done at least this way you have two diffrent tire size to choose from. If you go with 5.13's your stuck with a 37, and with this setup I turn 3200rpm going 75mph
Old 12-24-2013, 04:25 AM
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+1 on 4.88. I am running true 35" tires on 2013 2dr and have not added bumper, skid protection weight yet. I also really like the option to go to 37". I run right at 3k at 75 mph and 3.2k at 80 mph, so a little extra weight should be okay. Around town, it is perfect. This is my daily driver.
Old 12-24-2013, 04:54 AM
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Originally Posted by itsthelaw
+1 on 4.88. I am running true 35" tires on 2013 2dr and have not added bumper, skid protection weight yet. I also really like the option to go to 37". I run right at 3k at 75 mph and 3.2k at 80 mph, so a little extra weight should be okay. Around town, it is perfect. This is my daily driver.
Auto or manual?
Old 12-24-2013, 04:55 AM
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Sorry...auto
Old 12-24-2013, 04:59 AM
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Just remember when you use that chart that 35's when sitting on the ground with full load are really only a 34in tire and thats the # you need to use on the chart.
Old 12-24-2013, 08:14 AM
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I own a 2012 4 door manual with 37's just regeared to 4.88 and I'm loving it.
Old 12-24-2013, 10:38 PM
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Originally Posted by itsthelaw
+1 on 4.88. I am running true 35" tires on 2013 2dr and have not added bumper, skid protection weight yet. I also really like the option to go to 37". I run right at 3k at 75 mph and 3.2k at 80 mph, so a little extra weight should be okay. Around town, it is perfect. This is my daily driver.
Thnx, itsthelaw; have a 2dr. auto w/true 35"also-sounds like 4.88 is the way to go. ;-)
Old 12-25-2013, 07:43 AM
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4.56 for 35's (34.4 duratracs)

On my 2012 HEAVY JKUR 6 speed

On the highway I'm getting terrible mileage due to higher rpm's but LOVING the ratio regardless. I live in Colorado and tow 8% of my mileage.

I think 4.88 would be ideal for 37's and 5.13 would be great for a dedicated wheeler. Sooo glad I didn't go 4.88- the top speed would be awful. At 80 I'm already at 3,000K

Just my .02
Old 12-25-2013, 08:22 AM
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Originally Posted by section8JK
okay so I know this had been beating to death probably but I'd like to hear some other input on this, i have a 2013 JKU sport AUTO with 3.73's right now I'm running a 2.5 TF coil lift with some MTZ 33's. now i plan on going up to 35's here shortly just don't know which gear set to go with and the reason I'm asking is cause i can get a killer deal on a set of 5.13 but is it gonna be too much for my DD and bad on the highway? i go wheeling a good bit but just not sure i wanna go with such an aggressive gear since its more of a DD than a trail rig, thats why i also ask 4.88's or 4.56's?
i found this site to be helpful when looking it up:

Regearing Basics

Cheers


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