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Old 01-04-2012, 03:15 PM   #1
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Regearing or superchip ????

I have a 2009 wrangler unlimited 4 door with 4 inch skyjacker lift ( I think, it was bought used from dealer and they did not know the exact size of lift) 37x12.50 yokohama geolanders. I am wanting to regear or get a superchip for it but i am not sure about the superchip, don't know much about them. Anyone have any advise to help steer me in the right directions. I know the regearing will cost more but i would rather pay more if that is the smarter decision. If I go with regearing what gears should I go with, I am not sure what I have in it now, the tag on the axle has been removed or came off. Any help would be much appreciated


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Old 01-04-2012, 03:48 PM   #2
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Old 01-04-2012, 04:01 PM   #3
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I would go with regearing as superchips have little effect on jeeps besides changing shift points for the auto.

As far as what company to go with, many people go with Yukon or I have USA Standard in mine.
As far as ratio goes, go as deep as you can with the auto, and I think 5.13 for the 6 speed, but I am not sure if a non D44 front can go that low.

There are also other things to consider when running 37s like brakes, steering, and axle strength, but that is out of the scope of my knowledge.

Edit: also you can figure out your current ratio by jacking up a tire, and spinning it two revolutions while counting drive shaft revolutions.
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Old 01-04-2012, 04:22 PM   #4
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Originally Posted by InvertChaos View Post
I would go with regearing as superchips have little effect on jeeps besides changing shift points for the auto.

As far as what company to go with, many people go with Yukon or I have USA Standard in mine.
As far as ratio goes, go as deep as you can with the auto, and I think 5.13 for the 6 speed, but I am not sure if a non D44 front can go that low.

There are also other things to consider when running 37s like brakes, steering, and axle strength, but that is out of the scope of my knowledge.

Edit: also you can figure out your current ratio by jacking up a tire, and spinning it two revolutions while counting drive shaft revolutions.
^^^This.

Skip the tuner. With your setup, it's not gonna do you much good.

For gearing I believe the cut-off is 5.38's. Since you've got an '09, that's where I'd go. 5.13's would help you but aren't ideal for that tire size. Since you're gonna spend the $$, go with 5.38.

At the least, for 37's you want a new steering stabilizer, and a sleeve/gusset job for your front axle. With tires that size, you will bend or break your axle, otherwise, especially if you wheel it (which I'm assuming you do.)
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Old 01-05-2012, 08:06 AM   #5
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Thanks alot, that clears up lot for me.
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Old 01-07-2012, 01:36 PM   #6
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I vote for the re-gear too(smarter move) as well with the 5.38's

My friend went to 4.88's(5.13's were bo at the time) with 33" AT's and that wasn't enough for off-road. He now has 35" MT's and it feels good only on the road.

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