Fitting 37s
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
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
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
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
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
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
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
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



