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Old 08-05-2018, 07:21 PM
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Tires Rubbing with 37’s on Teraflex 4” Short Arm

Looking for some suggestions on what to do here. My rear tires are rubbing against my OEM Rubicon rock sliders. Do I cut the rock sliders? Remove them? Or adjust my control arms? Here are some pictures of the jeep at more or less level ground. As you can see the rear tires are extremely close to the rock sliders especially considering that I followed Teraflex’s control arm recommendations and the kit was advertised to clear 37’s. 2017 Rubicon with 4” Teraflex short arm lift kit (8 adjustable alpine arms) on 37x12.5 tires (they really measure 36).

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Old 08-05-2018, 08:06 PM   #2
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Most People just cut them short

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Old 08-05-2018, 08:21 PM   #3
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cut them! its nice that your jeep already has the trimmed pinch seam from the factory, so you dont have to modify that too.
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Old 08-05-2018, 08:29 PM   #4
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Cut them. I've done several of them and it's really easy. For cutting, I prefer a hack saw and muscle to a Sawzall. You are able to keep it straighter and not flake the powdercoat. Touch up paint the bare metal and reinstall the factory end cap. It will look OEM.
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Old 08-05-2018, 10:35 PM   #5
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That is odd that they are so close. 4 inch lifts even with stock arms usually give you more space than that. With adjustable it should push the axle back a bit.
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Old 08-05-2018, 10:35 PM
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Thanks for the suggestions, looks like cutting is the concensus
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Old 08-05-2018, 10:38 PM
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That is odd that they are so close. 4 inch lifts even with stock arms usually give you more space than that. With adjustable it should push the axle back a bit.
Agreed that this is weird, almost like the recommend control arm lengths were too short
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Old 08-05-2018, 11:22 PM   #8
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That is odd that they are so close. 4 inch lifts even with stock arms usually give you more space than that. With adjustable it should push the axle back a bit.
Agreed that this is weird, almost like the recommend control arm lengths were too short
Prior to cutting you can always try adjusting the arms. Maybe use another brand's suggested length. If it solves the problem, great! If not, then you can cut.
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Old 08-05-2018, 11:35 PM   #9
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While cutting them a Walmart Cart rack works perfect to hold. Ask me how I know. (First real outing with your jeep you can learn a lot!)
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Old 08-06-2018, 08:16 AM
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That is odd that they are so close. 4 inch lifts even with stock arms usually give you more space than that. With adjustable it should push the axle back a bit.
Agreed that this is weird, almost like the recommend control arm lengths were too short
Prior to cutting you can always try adjusting the arms. Maybe use another brand's suggested length. If it solves the problem, great! If not, then you can cut.
I was thinking of using the 4 door suggested length but I think I’m just going to call Teraflex and ask them how much I could adjust. You can clearly see the wheel is not centered. Additionally the rig is squatting in the rear. I don’t think the rear springs are stiff enough for my JCR bumper carrier and spare tire. So I’m going to ask them what they suggest there.
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Old 08-06-2018, 08:17 AM
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While cutting them a Walmart Cart rack works perfect to hold. Ask me how I know. (First real outing with your jeep you can learn a lot!)
Proper tools for the job lol
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Old 08-06-2018, 08:24 AM   #12
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I was thinking of using the 4 door suggested length but I think Iím just going to call Teraflex and ask them how much I could adjust. You can clearly see the wheel is not centered. Additionally the rig is squatting in the rear. I donít think the rear springs are stiff enough for my JCR bumper carrier and spare tire. So Iím going to ask them what they suggest there.
that's not uncommon. they can't account for the different variations in aftermarket bumpers. find your self some 1/2" or 3/4" spacers for the rear springs. that should level it out.

it never hurts to adjust the control arms to push the axle further back. just be mindful when you do, you may wind up having to trim the pinch seam in the rear of the fender wheel.
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Old 08-06-2018, 11:20 AM   #13
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You should be pushing the axle back with rear adjustable control arms and trim the stock rock rails. I pushed my rear back around 1 1/4" and trimmed the rear fender well pinch seam a bit. I used the Rock Krawler control arm lengths for the rear as my starting point and then adjusted pinion angle accordingly.





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Old 08-07-2018, 07:07 AM
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I was thinking of using the 4 door suggested length but I think I’m just going to call Teraflex and ask them how much I could adjust. You can clearly see the wheel is not centered. Additionally the rig is squatting in the rear. I don’t think the rear springs are stiff enough for my JCR bumper carrier and spare tire. So I’m going to ask them what they suggest there.
that's not uncommon. they can't account for the different variations in aftermarket bumpers. find your self some 1/2" or 3/4" spacers for the rear springs. that should level it out.

it never hurts to adjust the control arms to push the axle further back. just be mindful when you do, you may wind up having to trim the pinch seam in the rear of the fender wheel.
So my lift kit came with front and rear spring spacers. I installed both when I put the lift on. Should I get more spacers or bigger springs?
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Old 08-07-2018, 07:36 AM   #15
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So my lift kit came with front and rear spring spacers. I installed both when I put the lift on. Should I get more spacers or bigger springs?
larger spacers. measure the ones in the kit, and get the next size up. you probably got 1/2" spacers, maybe buy 3/4" or 1" spacers, based on how much the jeep is sagging.
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Old 08-07-2018, 10:15 AM   #16
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you probably need about 18 upper and 20 lower length, start there and eyeball it, definately move the rear axle back a bit. And yes cut the rails shorter
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Old 08-07-2018, 12:38 PM   #17
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I was thinking of using the 4 door suggested length but I think I’m just going to call Teraflex and ask them how much I could adjust. You can clearly see the wheel is not centered. Additionally the rig is squatting in the rear. I don’t think the rear springs are stiff enough for my JCR bumper carrier and spare tire. So I’m going to ask them what they suggest there.
that's not uncommon. they can't account for the different variations in aftermarket bumpers. find your self some 1/2" or 3/4" spacers for the rear springs. that should level it out.

it never hurts to adjust the control arms to push the axle further back. just be mindful when you do, you may wind up having to trim the pinch seam in the rear of the fender wheel.
So my lift kit came with front and rear spring spacers. I installed both when I put the lift on. Should I get more spacers or bigger springs?
Remember the more you lift the jeep (with spacers or taller springs) the more the rear tire will be pulled in closer to the area that you are already too close to.
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Old 08-07-2018, 12:48 PM   #18
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We have 2 JKs on 37s ('14 and '18) I found that under full flex I need to trim quite a bit of the pinch seams (front and rear)

The rock rails needing to be trimmed is fairly common knowledge IMO. Better yet, if you're going off road ditch the flimsy factory rails and put something a little more robust on there
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Old 08-07-2018, 07:03 PM   #19
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Remember the more you lift the jeep (with spacers or taller springs) the more the rear tire will be pulled in closer to the area that you are already too close to.
another reason for long arms. at some point, getting the wheel back in the wheel well means the mid arms aren't close to parallel with the driving surface.
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Old 08-08-2018, 06:57 AM
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Remember the more you lift the jeep (with spacers or taller springs) the more the rear tire will be pulled in closer to the area that you are already too close to.
another reason for long arms. at some point, getting the wheel back in the wheel well means the mid arms aren't close to parallel with the driving surface.
Good points. I’m going to get a real heavy winch for the front first and see if that levels out that rake a little bit.
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Old 08-08-2018, 09:25 AM   #21
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Good points. Iím going to get a real heavy winch for the front first and see if that levels out that rake a little bit.
I was just going to suggest that! Lol

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