Gear change - : Jeep Wrangler JK Forum
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post #1 of 7 Old 01-30-2012, 08:10 PM Thread Starter
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Gear change

I'm looking to upgrade my stock 4:10's to 4:88's using what's left of my tax return. First priority is to payoff the Rubi. Then I'm looking at Or-Fab's rear tire carrier and a spare tire to match my shoes BFG MT KM2's.

My ? Is can I install the rear gears to save on gas now then upgrade the front? And what brand or distributor should look at?


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post #2 of 7 Old 01-30-2012, 08:11 PM
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Only if you disconnect the front axle. Pull the front driveshaft.
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post #3 of 7 Old 01-30-2012, 08:18 PM
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why not go 5.13? what size tires are you running? IMO i dont think you notice a big enough difference to justify the cost. i went from 3.73 to 5.13 and wish i had waited for the 5.38s to come out.

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post #4 of 7 Old 01-30-2012, 08:37 PM
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Stick or auto? What size sneaks? Not enough info to say what ratio would best suit what u want to do.

Is this thing on?.....
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post #5 of 7 Old 01-30-2012, 09:02 PM
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Yes you can run different gear front to back BUT, don't use 4wd. In fact take your front driveshaft right out just to be safe!
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post #6 of 7 Old 01-30-2012, 09:28 PM
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It all depends on what tranny you have. I run 37's with Yukon 5.38's. My RPM's at 70mph is right below 2400 RPM. If you have a manual, I'd run 5.13's with 37's. You have to take into consideration what tire size you ultimately want to run. I personally wouldn't go above 37's on a factory Dana 44 with seriously beefing up your axle. You can run a different gear set I'm the rear, but like the peeps above have said, DO NOT ENGAGE 4 WHEEL DRIVE!!!

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post #7 of 7 Old 01-31-2012, 07:49 AM
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Also, don't expect to save on gas if you run 4.88s with stock tires. It ain't gonna' happen. I just did that swap myself and so far my mileage is down about 0.5 MPGs from what it was before on the same tires.

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