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Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

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Fitting 37s

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Old Dec 27, 2011 | 04:07 PM
  #21  
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I folded mine over with a sledge then painted em. Was very easy to do.
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Old Dec 27, 2011 | 05:21 PM
  #22  
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You might want to install a 1" body lift. Very easy to install if you have an air gun.
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Old Dec 27, 2011 | 07:39 PM
  #23  
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I don't know the differences between an 08 and 10 Rubicon Unlimited are, but when I did my lift with the Currie 4" RockJock lift kit with BFG KM2 37s I had to:
Trim the rear stock rocker rails and pinchweld seam, used a sawzall and a grinder with a cut-off wheel and both where easy.
Cut a notch on the front skid plate for front drive-shaft clearance, I had to paint it, cut, go wheel, look for contact and cut again to ensure I had good clearance. I did eventually upgrade to Woods custom drive-shafts after I ripped off the stock drive shaft rubber boot, but I do wheel a little hard, so not sure if this is necessary for every application. Ugraded gears with Alloy 5.13 ring & pinion front and rear. I upgraded the front and rear axles with Superior chrom-moly, welded on c-arm gussets, and upgraded all u-joints. I toasted my stock steering stabilizer pretty quick, and upgraded with a Teraflex. Also added a beefy adjustable track bar to help deal with occasional death wobble (no problems since). Again, maybe not necessary for everyone, but I wheel in some remote areas in the Southwest and I wanted reliability.

I ran the above with the stock flares for 3 years, occasional slight rubbing front and rear but no serious flare damage. So I just now installed the Trail Mods flares and love them thus far.

So when someone asks "What do I have to do for 37s on my JK?" It all really depends upon your goals for off-road ability and reliability. Alot of folks reportedly do fine without many of the mods I selected, but I don't wheel with any other JK Unlimiteds to know for certain.

Regards,

Walker

Last edited by walker; Dec 27, 2011 at 07:46 PM. Reason: add info
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Old Dec 27, 2011 | 07:44 PM
  #24  
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Originally Posted by walker
I don't know the differences between an 08 and 10 Rubicon Unlimited are, but when I did my lift with the Currie 4" RockJock lift kit with BFG KM2 37s I had to:
Trim the rear stock rocker rails and pinchweld seam, used a sawzall and a grinder with a cut-off wheel and both where easy.
Cut a notch on the front skid plate for front drive-shaft clearance, I had to paint it, cut, go wheel, look for contact and cut again to ensure I had good clearance. I did eventually upgrade to Woods custom drive-shafts after I ripped off the stock drive shaft rubber boot, but I do wheel a little hard, so not sure if this is necessary for every application.
I upgraded the front and rear axles with Superior chrom-moly, welded on c-arm gussets, and upgraded all u-joints. I toasted my stock steering stabilizer pretty quick, and upgraded with a Teraflex. Also added a beefy adjustable track bar to help deal with occasional death wobble (no problems since). Again, maybe not necessary for everyone, but I wheel in some remote areas in the Southwest and I wanted reliability.

I ran the above with the stock flares for 3 years, occasional slight rubbing front and rear but no serious flare damage. So I just now installed the Trail Mods flares and love them thus far.

So when someone asks "What do I have to do for 37s on my JK?" It all really depends upon your goals for off-road ability and reliability. Alot of folks reportedly do fine without many of the mods I selected, but I don't wheel with any other JK Unlimiteds to know for certain.

Regards,

Walker
hey man I really appreciate the info and the detailed post, I dont wheel at all, ya ya blah blah antichrist in the jeep world and all that, my jeep is strictly a road/beach queen, so I am only worried about day to day driving and normal highway bumps so I know I have to definately cut the pinch seam, I figured "that triangle pointy thing" was going to get in the way before everyone explained to me it was called the pinch seam, not not sure what else I would really need for just turns and bumps
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Old Dec 27, 2011 | 08:01 PM
  #25  
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No sweat, I am not a "rock crawling off-road only snob", I go wheeling with folks with stock or minor modified vehicles all the time. We always have a great time.

So with that in mind, even in deep sand ruts or going over curbs, you will likely still have to do some minor trimming, and at least monitor your front drive-shaft contact with the front skid (if you have a skid on that model). I recall I didn't have to do much hard wheeling for it to come in contact, and it is a very easy trim job. Again, I am not sure if your model is different.

The important thing is to enjoy! I think 37s on a JK go together like "peas and carrots"! LOL

Regards,

Walker
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Old Dec 28, 2011 | 04:47 PM
  #26  
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think a teraflex leveling kit on top of my lift would give to much gap on the front wheels??? Just a thought
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Old Dec 28, 2011 | 06:29 PM
  #27  
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Originally Posted by jknit
think a teraflex leveling kit on top of my lift would give to much gap on the front wheels??? Just a thought
You have to consider what is already in your 4" lift, not sure if an additional spring lift would be ideal, you may want to contact the manufacturer. You may need even longer sway bar links and different shocks than what you have in the 4" kit you purchased.

As for "too much gap", that is purely a matter of personal taste... but I would say yes it would look too high.

Regards,

Walker
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Old Dec 28, 2011 | 06:44 PM
  #28  
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Originally Posted by jknit
Even for just daily driving???
Yep. If you turn sharp from an average driveway you will probably rub.
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Old Dec 30, 2011 | 01:21 PM
  #29  
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Originally Posted by walker

You have to consider what is already in your 4" lift, not sure if an additional spring lift would be ideal, you may want to contact the manufacturer. You may need even longer sway bar links and different shocks than what you have in the 4" kit you purchased.

As for "too much gap", that is purely a matter of personal taste... but I would say yes it would look too high.

Regards,

Walker
Maybe just a body lift then and flat fenders
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