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Old 10-20-2012, 09:45 PM   #1
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Gearing 4.88's vs 5.13's ?

I'm ordering my gears and arb lockers Monday. I want to make sure I pick the best ratio. I drive an 09 jk with auto trans, superchips flashpaq and getting 35x12.5" duratracs next Friday. It's my DD so I'm looking to build the best for both on/off road. Currently running 3.73's on 33x10 Falken and getting 16+ mpg. Looking to maintain or improve mileage and don't want to run the rpm's too high on the freeway.

If you are running 35's and have either of those gear ratios, what rpm are you running at 80mph? (With o/d on)

I appreciate the responses...

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Old 10-20-2012, 09:48 PM   #2
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I have an '08 with auto trans and 35's. I rarely do 80, but at 70mph I am at 2500 rpm with 5.13's. That's where you want to be. IMO you will want 5.13. 80mph maybe around 2800 rpm


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Old 10-20-2012, 11:06 PM   #3
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Sounds good, thanks Dan!
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