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31's with 3.55

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Old 05-29-2012, 01:38 PM
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Default 31's with 3.55

So I've been planing things for this summer and right now I know I'm going to lift 3" but not sure how my gears will do with 31s
Anyone running 3.55 and 31s?
Old 05-29-2012, 01:45 PM
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Im sure almost everyone running 31s are on stock 3.55s I am and I know 4 buddies that are. I think the ratio is fine for 31s..couldn't tell a noticible difference in mileage or power. Im at 5 inches and 31s
Old 05-29-2012, 01:53 PM
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I noticed a SMALL decrease in power when I put 31s on my Jeep. Not noticable enough to justify the regear.

Roll with it.
Old 05-29-2012, 01:53 PM
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31s with 3.55 here too; a lot of people here are too cheap to regear for 31-33s. My gas hurts
Old 05-29-2012, 02:00 PM
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Well I guess I'll probably go with 31's
How much does it hurt your mpg?
Old 05-29-2012, 02:25 PM
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Originally Posted by Michael952
Well I guess I'll probably go with 31's
How much does it hurt your mpg?
i lost about 1 or 2 mpg
Old 05-29-2012, 02:35 PM
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I run 32's and still pull two snowmobiles in an enclosed trailer . 31's with 3.55's is no problem
Old 05-29-2012, 02:44 PM
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I'm running 33s with 355s didn't notice a difference just Burns a little more gas
Old 05-29-2012, 02:46 PM
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I lost about 2 mpg. And I don't accelerate quickly or go fast on the highway.
Old 05-29-2012, 02:59 PM
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Originally Posted by Nperryman
I lost about 2 mpg. And I don't accelerate quickly or go fast on the highway.
i stomp it lol...
Old 05-29-2012, 03:17 PM
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Originally Posted by Michael952
Well I guess I'll probably go with 31's
How much does it hurt your mpg?
I gained 3 mpg going from 31 inch TSL Super Swampers to 235/75R15 A/T's. 13 mpg to 16 mpg around town.
Old 05-29-2012, 03:20 PM
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I'm surprised it wasn't more like a 5 mpg gain, haha!
Old 05-29-2012, 03:21 PM
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my last xj, and just about every xj i know has lost power and mpg.
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