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Old 01-17-2018, 08:31 PM
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Show off your 37s setup!

Anyone running 37s with 2-4 in of lift, share your tires and lift setup with pics! I'm currently planning how I want to upgrade my 2017 JKU

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Old 01-19-2018, 12:47 PM   #2
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I've posted these in a few other threads but here's mine on 37" Cooper STT Pros. The lift is a 3.5" Metal Cloak.



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Old 01-19-2018, 12:51 PM
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I've posted these in a few other threads but here's mine on 37" Cooper STT Pros. The lift is a 3.5" Metal Cloak.


That's a good looking setup! Any particular reason you wanted to stick with stock wheels?
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Old 01-19-2018, 02:29 PM   #4
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Yeah, I am going to upgrade to Dana 60s and they have a different bolt pattern. I didn't want to invest in new wheels just to have to do it again later. I am using 1.75" wheel spacers currently.
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Old 01-20-2018, 10:17 PM
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Yeah, I am going to upgrade to Dana 60s and they have a different bolt pattern. I didn't want to invest in new wheels just to have to do it again later. I am using 1.75" wheel spacers currently.
Good news for me, one less thing I'll have to budget for. What size exactly are your tires?
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Old 01-21-2018, 01:00 AM   #6
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37*12.5*17
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Old 01-21-2018, 01:30 AM   #7
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RK 3.5" X-factor with falcon 3.3 shocks. Black rock type 997 steel wheels with firestone destination mt2s. JCR fenders, front and rear. Crawler conceptz rockers and bumpers.
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Old 01-21-2018, 01:41 AM
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37*12.5*17
Do you feel the 12.5 is sufficiently wide enough or would you recommend something a little beefier?
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Old 01-21-2018, 01:55 AM
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RK 3.5" X-factor with falcon 3.3 shocks. Black rock type 997 steel wheels with firestone destination mt2s. JCR fenders, front and rear. Crawler conceptz rockers and bumpers.
Really digging the color matching on the d rings and logos
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Old 01-21-2018, 10:36 AM   #10
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Mine- 3" Mopar stage III (Teraflex S/T 3) with 37x13.5x17 Toyo MTs







The wife's- Teraflex Alpine CT3 with 37x12.5x17 Cooper STT Pro

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Old 01-21-2018, 01:20 PM
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Mine- 3" Mopar stage III (Teraflex S/T 3) with 37x13.5x17 Toyo MTs







The wife's- Teraflex Alpine CT3 with 37x12.5x17 Cooper STT Pro

Are you rockin spacers on yours? Also, hows the highway ride on the toyos?
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Old 01-21-2018, 01:33 PM   #12
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Are you rockin spacers on yours? Also, hows the highway ride on the toyos?


No spacers on mine, wheel is 4.5Ē BS.

Iíve put 75k on the Toyos and theyíve done great. Just the right amount of hum IMO and they do well in rain and snow.
Only con is a slight pull to the right.


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Old 01-21-2018, 09:58 PM   #13
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Do you feel the 12.5 is sufficiently wide enough or would you recommend something a little beefier?

12.5" has always worked well for me. I don't think I personally would run much bigger than a 13.5" just because of how tight some of our trails are around here.
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Old 01-21-2018, 11:57 PM
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Once I throw 37s and a [probably 3.5 in] lift on it, what other upgrades will I absolutely have to make? Eg I have 3.73s, will I need to upgrade?
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Old 01-22-2018, 11:53 AM   #15
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If you are not off-roading then theres nothing you absolutely have to do. But I would highly recommend beefing up your steering and I would regear. I have 4.10s now and it's not great. I plan to go to 4.88s this summer. Bigger brakes would also be a good idea. You will need a programmer so that you can correct your speedometer and get your shift points back in line. I had to drive my Jeep recently with the stock shift points and my MPG tanked. It wants to hang in 3rd gear for way too long.

If you do want to wheel with 37+ tires I would really look at a beefier front axle. I would also look at the PSC Big Bore steering box or you could go with ram assist.

I will warn you your ball joints will probably be the first to go due to the larger tire size. (Mine did) You may also end up bending the rear axle shaft. So budget in new ball joints and axle shafts. Luckily I haven't bent mine yet. But both seem to be a weak spot on the JKs.
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Old 01-23-2018, 04:53 AM
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If you are not off-roading then theres nothing you absolutely have to do. But I would highly recommend beefing up your steering and I would regear. I have 4.10s now and it's not great. I plan to go to 4.88s this summer. Bigger brakes would also be a good idea. You will need a programmer so that you can correct your speedometer and get your shift points back in line. I had to drive my Jeep recently with the stock shift points and my MPG tanked. It wants to hang in 3rd gear for way too long.

If you do want to wheel with 37+ tires I would really look at a beefier front axle. I would also look at the PSC Big Bore steering box or you could go with ram assist.

I will warn you your ball joints will probably be the first to go due to the larger tire size. (Mine did) You may also end up bending the rear axle shaft. So budget in new ball joints and axle shafts. Luckily I haven't bent mine yet. But both seem to be a weak spot on the JKs.
At the risk of asking a stupid question, shift points aren't an issue with a manual, right?

Also, what kind of front axle should I be looking at to budget for?
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Old 01-23-2018, 10:09 AM   #17
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Oh yeah, with a manual you should be fine. You may still want to correct your speedometer.

I would look at the ProRock 44 or something similar. Currie, Teraflex, theres a bunch of good ones out there.

I think if I wasn't going to 60s I would do a kit like this.
https://www.dynatrac.com/axle-assemb...e-package.html

I say that because it comes with everything you need to regear the rear axle plus lockers. You'll just need to add an air compressor to run the ARB lockers. You can also use it to air up your tires at the end of the day.

Or you could just get the front housing built for a lot less.
https://www.dynatrac.com/axle-assemb...r-jeep-jk.html

The reason I suggest a stronger housing is because I watched a guy break his housing on the long tube side running only 35"s. Plus if you look around online you'll see a lot of examples from others that have had issues with the stock front tubes.

This isn't his but when it broke it looked just like this one.


Or this one.
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Old 01-23-2018, 11:35 AM   #18
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The reason I suggest a stronger housing is because I watched a guy break his housing on the long tube side running only 35"s. Plus if you look around online you'll see a lot of examples from others that have had issues with the stock front tubes.

This isn't his but when it broke it looked just like this one.
Dang. You are dead in the water then, yes? There is no emergency trailside repair that will even let you limp to civilization at that point, right?
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Old 01-23-2018, 12:02 PM   #19
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Right. We limped him off the trail and onto a trailer. There is no driving anywhere like that.
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Old 01-23-2018, 01:07 PM   #20
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Here's my set up. I'm running a MetalCloak 3.5" Game Changer, with Falcon 3.3's. 37x12.5 Mastercraft XHT's, 17" Method Fat Fives, TeraFlex 1.25" spacers. I've also upgraded the front axle to a TeraFlex Tera 44R with upgraded axle shafts. Upgrading the front axle got all my geometry back to factory settings. I had TeraFlex build this in house and re-gear to 4.88's, OEM E-Lock diff., and TF heavy duty ball joints.

If you're going to run 37's, and actually wheel your Jeep, you need to do this right. My other mods for the 37's:

- Mopar BBK
- TeraFlex JK Performance Rear Brake Upgrade-EBC YellowStuff Truck Pads
- PSC Big Bore XD Steering Gear
- Adams 1310 Drive Shaft (Front)










I detail all these mods in my build thread. Good luck with your build! This is my daily driver.







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Old 01-23-2018, 01:32 PM   #21
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^^^ Yeah, do that. I am working my way up to that. The Mopar master cylinder and brake booster is next on my list. Then the PSC big boar steering followed by Dana 60s. Thats my list of mods to accomplish this year. Saving for the axles is the hardest part.
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Old 01-23-2018, 01:39 PM   #22
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@Buildit did you tear the boot on your draglink on the pitman arm side? I viewed your picture at full size and I see what might be some grease on it. I ask because I did with the same setup you have. It seems to make contact with the sway bar when in full droop and full drivers side turn.
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Old 01-23-2018, 01:47 PM   #23
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I just had 37ís installed a week or so ago

- RK 3.5x stage 2 lift
- 4.5bs wheels
- ridge grappler 37-12.5-17

Power or lack there of isnít as bad as I expected. My rubicon is a auto and has the 3,73ís, havenít had any issues, not much different vs before the tires. Last tank according to the lie-o-meter was 18.2 mpg mostly highway driving.

I plan on rehearing, also gussets, cís and trusses.... plus a new driveshaft

Acceleration and deceleration is noticbly slower vs before the 37ís however at least on the street itís fine. I can still easily go 75mph +

Then yesterday I looked at a new jlu.... hmmmm
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Old 01-23-2018, 02:18 PM   #24
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I just had 37ís installed a week or so ago



- RK 3.5x stage 2 lift

- 4.5bs wheels

- ridge grappler 37-12.5-17



Power or lack there of isnít as bad as I expected. My rubicon is a auto and has the 3,73ís, havenít had any issues, not much different vs before the tires. Last tank according to the lie-o-meter was 18.2 mpg mostly highway driving.



I plan on rehearing, also gussets, cís and trusses.... plus a new driveshaft



Then yesterday I looked at a new jlu.... hmmmm


How about a pic or two? Sounds about what I would like to get to with mine.


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Old 01-23-2018, 02:21 PM   #25
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How about a pic or two? Sounds about what I would like to get to with mine.


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Ahh. I see them now. Nice set up!


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Old 01-23-2018, 02:30 PM   #26
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How about a pic or two? Sounds about what I would like to get to with mine.


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I am computer challenged, if you want send me a PM with a email or cell number and I can send pics to you. Feel free to post them if you want
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Old 01-23-2018, 02:36 PM   #27
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@Buildit did you tear the boot on your draglink on the pitman arm side? I viewed your picture at full size and I see what might be some grease on it. I ask because I did with the same setup you have. It seems to make contact with the sway bar when in full droop and full drivers side turn.
Hi stitch! I did notice that I blew some grease out of it, I thought it was from the pounding I was giving it on the Moab trails. I'm going to inspect it further now, thanks! Did you end up replacing yours?


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Old 01-23-2018, 02:42 PM   #28
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Steer Smarts sent me a new boot. However, my jeep has been in and out of the dealership due to a clogged heater core and have not had a chance to swap it yet.
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Old 01-23-2018, 03:07 PM   #29
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Running 4.5" Metalcloak dual rate coils with Falcon 3.2 adjustables. 20" moto metals on 37x12.5x20 federals couragia m/t's. Before installing the Artec truss and C's I did end up bending my passenger C on a hard landing at the dunes. Truss, C's, and gussets are must. I learned the hard way.
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Old 01-23-2018, 04:03 PM   #30
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Steer Smarts sent me a new boot. However, my jeep has been in and out of the dealership due to a clogged heater core and have not had a chance to swap it yet.
Thanks buddy! I'm going to reach out to them regarding this! Sorry for the thread highjack boys!


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