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Regearing my jk

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Old 05-11-2016, 09:15 PM
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Regear definitely. Worth the $! Use the chart as it's very accurate
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Old 05-11-2016, 09:18 PM
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Auto trans chart if yours is auto
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Old 05-12-2016, 05:03 AM
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Originally Posted by bryns15jk
I'm running 305/70-18 right now n it's gutless. I had stock tires n tried pulling a trailer with a medium size tractor n it was gutless. Which I am to expect with the current gearing.
where I am from... A medium size tractor on a trailer exceeds tow capacity by 1500 lbs.

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Old 05-12-2016, 05:06 AM
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Originally Posted by BFGMallTerrains
Regear man. Best upgrade ever. Went from stock 3.21 on new 34" tires (minivans packed with kids would smoke me off a stoplight) to 4.56 and HUGE difference in acceleration and even much better mileage if that even matters. Feels like a Hellcat engine swap
I bet it doesn't.

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Old 05-12-2016, 10:37 AM
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Towing capacity of a jku is 3500lbs. My tractor and trailer are right around 2900. So it's within capacity.
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Old 05-17-2016, 10:13 AM
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4:10 as opposed to 4:56 with mileage and speed. 6spd tranny. Any thoughts?
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Old 05-17-2016, 10:29 AM
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Originally Posted by bryns15jk
4:10 as opposed to 4:56 with mileage and speed. 6spd tranny. Any thoughts?
4.10s would be a complete waste of money.

4.56s would result in less than 250 in higher engine rpm at highway speeds for a 2012+ 6 speed on 305/70R18s.
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Old 05-17-2016, 11:02 AM
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That's what I got from the chart but wondered if anyone knew from experience. I'm thinkin same thing.
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Old 05-17-2016, 04:31 PM
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With 34 or 35" tires go 4.56. You'll totally regret 4.10 if you go that direction
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Old 05-17-2016, 10:54 PM
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Originally Posted by BFGMallTerrains
With 34 or 35" tires go 4.56. You'll totally regret 4.10 if you go that direction

Agree. I have a 2014 6spd Rubi that had stock 4.10s. I put on 315/70/17s. It was okay, but found myself downshifting from 6th to 5th on anything with a moderate grade and first gear did not have as much low end as I like off road in 4hi (4lo was fine)

I swapped out to 4.56 after about 3 months. It was a solid improvement. overall combo on and off road the 4.56s are much better than 4.10s. Mileage went down with 4.56s, (my guess is about .5 - 1 mpg) but it was worth it for the performance.

As aside, I recently added an Airaid intake and. Flowmaster catback exhaust. The combo makes the motor breath better and put a little extra grunt into the mix. Surprisingly mileage is back up.
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