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Old 02-12-2013, 06:43 AM   #1
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Talking gear ratio

I have a 2012 jk sport going to put new gears and lockers what would be the best for on and off road with 6 speed manual. 33'' tires maybe 35s I was thinking 410s ?

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Old 02-12-2013, 06:52 AM   #2
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i have factory rubicon 4.10s and a manual and have no intention of regearing. what do you have now?

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Old 02-12-2013, 07:09 AM   #3
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Old 02-12-2013, 07:12 AM   #4
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dont bother regearing. you dont need it. try it first but im sure youll be fine. if you go real heavy 35s maybe but the 33s or a 35 should be fine.
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Old 02-12-2013, 07:19 AM   #5
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im running 35x12.5's i went with 4.88's...they're really good for offroading, highway is so so i guess. I wasnt expecting to get good gas milage with a lift and 35's anyways but im getting like 12-13MPG?
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Old 02-12-2013, 07:26 AM   #6
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I think you will be fine with what you have right now and 33's. But if you are going to have lockers installed, and have the pumpkins opened up anyway (and are thinking about 35's)...maybe 4.56's? I would say 4.10's...but that is a lot of money to only go up one step.
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Old 02-12-2013, 07:49 AM   #7
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This is a situation that is highly subjective; mostly what you want to do with your JEEP. But going to the expense of re-gearing from 3.73' to 4.10's wouldn't be enough difference to warrant the cost, IMHO. But that is something only you can truthfully answer for your wants and needs. We each want and expect something different form our JEEPS. Drive the hell out of it, then decide!!
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Old 02-12-2013, 12:19 PM   #8
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Assuming you've seen these?
I just drove a buddy's 4 door Rubi with 35" MTRS and 4.10s. I drove it and thought it was fine- my husband drove it and said he'd re-gear. Helpful huh?
But if you're going to re-gear why pay the money to go from 3.73s to 4.10s? We're putting in 4.56s this weekend (from 3.21s). I was worried about highway RPMs at first. I am only on 305/70/17s. But I got on the highway and played with running at 70 MPH at current RPMS- and then downshifted to crank it to 2800 RPMs. (Auto tranny) The torque curve is so flat and the HP percentage gain is the same across this range- I didn't notice much difference. At least not until above 3100 RPMS. Just IMO however. You might be more concerned with highway- 4.10s are probably better. Like Jeepdon says it depends on your needs. Most of my driving is city, MPG isn't important, and I want a better crawl ratio.

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