Project-JK's NEW 2012 Dozer JK Unlimited Rubicon - RubiCAT
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I have a 2012 JKUR with EVO Coilovers running 37s with 410 gears and it is great. At 70 MPH is at 2300 RPM and you give it a little gas to pass its drops to 4th gear the RPM goes up to 2900 off you go.
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i have 4.10's now and am pretty happy with them. if i had 3.73's, i think i would go 4.56 as that will get you back to stock. long term, i may consider going 4.88 some day just to get a bit more power but, i'll most likely hold off on deciding until i can afford to get prorock 60's.