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Old 01-10-2014, 10:53 PM   #1
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Hmm I have no JK lean.

Out of curiosity I measured certain points on the front of my '13 JKU tonight. Everything matched up perfectly.

Ground to lip of top spring perch matched on both sides
Ground to outside front corner of fender matched on both sides which was surprising since fenders can easily be slightly misshapen.
Ground to the lower 'slit' area where grill meets body matched on both sides

So then I start thinking OK... I have JKS adjustable sway bar discos installed. If the sway bar is not level on each end, and causes a stock JK to sit with a lean, then I might have accidently corrected my lean by sizing the length of my JKS discos to match their sway bar mount point rather than to actually match each other in length. But nope...

Ground to top of sway bar end matched on both sides.

So no JK lean.

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Old 01-11-2014, 09:57 AM   #2
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Never had it with my 10 Rubicon, prior to and after off road bumpers and winch.

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Old 01-11-2014, 10:00 AM   #3
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I am in the same boat. 4 in the drive and none with any lean. That is why I was so puzzled by the folks that do.

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Old 02-07-2014, 06:17 PM   #4
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That is interesting, I was just told today by a dealer that 90% of the JK unlimiteds lean to the drivers side, and that is normal and acceptable by Chrysler with no fix from the factory.
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Old 02-07-2014, 06:20 PM   #5
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2013 Rubicon, and no lean!
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Old 02-07-2014, 06:59 PM   #6
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It's Normal. Seems to be more pronounced lifted.
Nobody's really came up with a answer. Some say the lean evens out with you in the drivers seat.
My jeep leans but coils measure almost identical. This tells me it's either the body or frame.

I have seen using adjustable links to preload one side, not sure I want to do this but it's worked.
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Old 02-07-2014, 07:12 PM   #7
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Originally Posted by littlebaler View Post
That is interesting, I was just told today by a dealer that 90% of the JK unlimiteds lean to the drivers side, and that is normal and acceptable by Chrysler with no fix from the factory.
Lean to the drivers side!, that's opposite of what I think most are seeing.
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Old 02-07-2014, 08:42 PM   #8
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I have to call BS on this theroy. I mean really...the weight of the gas tank is not going to casue a lean.

My 2013 doesnt have it.

Urban legend. Peoples minds trick themselves into seeing a lean.
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Old 02-07-2014, 09:30 PM   #9
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2007 JKU Saharah and my has a slight lean. But mine is older than most of the replies so far!
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Old 02-07-2014, 09:42 PM   #10
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My mechanic said he's sees it a lot on Jeepers who tend to get on the gas pedal off the line. The high levels of torque over repeated hard launches tweaks the frame, body and suspension to give a slight lean back towards the rear passenger side.
Try it yourself: hard launch and drop the clutch at your next red light and you can feel the left front end of the Jeep get a little light.
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Old 02-07-2014, 09:53 PM   #11
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Originally Posted by kcookuscg View Post
2007 JKU Saharah and my has a slight lean. But mine is older than most of the replies so far!
Pictures....our it doesn't lean...
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Old 02-07-2014, 09:55 PM   #12
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Originally Posted by Gdirrty View Post
My mechanic said he's sees it a lot on Jeepers who tend to get on the gas pedal off the line. The high levels of torque over repeated hard launches tweaks the frame, body and suspension to give a slight lean back towards the rear passenger side.
Try it yourself: hard launch and drop the clutch at your next red light and you can feel the left front end of the Jeep get a little light.
What? Your mechanic in Colorado by chance?

So what he's saying is it's just manual transmission...

You believe in Bigfoot?
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Old 02-07-2014, 11:02 PM   #13
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What? Your mechanic in Colorado by chance? So what he's saying is it's just manual transmission... You believe in Bigfoot?
Why yes good sir, my mechanic (who also happens to be my father) and I are both natives of CO, Lakewood to be specific.

Hard Launching/dropping the clutch can both exacerbate and accelerate the amount of lean you may see, but the ultimate source of the twisting/torquing comes from the engine and the rotational forces exerted through the drivetrain so autos would be impacted as well.

This torque action is also not exclusive to Jeeps; watch a muscle car drag race and the car will tweak toward the passenger rear and oftentimes lift a driver side front tire. My opinion is that we tend to notice it more in Jeeps and off road vehicles because the center of gravity is higher and the suspensions are designed to articulate and absorb the forces rather than exert traction into the tires like a sports car would.

And I think we all know the Bigfoot theory is merely a smokescreen the nefarious Sasquatch Nation has perpetuated in order to forge their alliance with the Alien Invaders and the CIA 9/11 masterminds...
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Old 02-07-2014, 11:08 PM   #14
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Originally Posted by gorillahydrographics View Post
I have to call BS on this theroy. I mean really...the weight of the gas tank is not going to casue a lean. My 2013 doesnt have it. Urban legend. Peoples minds trick themselves into seeing a lean.
It's not complete BS, my 2012 leans 1/4" to the passenger side, my buddies 08 leans 1/4" to the passenger side also. Looks like to me the whole drive train is off center to the passenger side. Crawl under your jeep and take a look, look at the difference in the motor mounts, measure each frame rail to the center of the tranny....mine is not centered. So engine, transmission, transfer case, fuel, battery....there is more weight on the passenger side. I'm 205 ish and change the driver side exactly 1/8". So with a full tank and me in the jeep it's 1/8" low on the passenger side...no big deal!
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Old 02-07-2014, 11:23 PM   #15
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Originally Posted by gorillahydrographics View Post

What? Your mechanic in Colorado by chance?
ROFL! That's a good one. I'll have to check and see if I have the lean. Never noticed it before.
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Old 02-08-2014, 12:07 AM   #16
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Originally Posted by Gdirrty View Post

Why yes good sir, my mechanic (who also happens to be my father) and I are both natives of CO, Lakewood to be specific.

Hard Launching/dropping the clutch can both exacerbate and accelerate the amount of lean you may see, but the ultimate source of the twisting/torquing comes from the engine and the rotational forces exerted through the drivetrain so autos would be impacted as well.

This torque action is also not exclusive to Jeeps; watch a muscle car drag race and the car will tweak toward the passenger rear and oftentimes lift a driver side front tire. My opinion is that we tend to notice it more in Jeeps and off road vehicles because the center of gravity is higher and the suspensions are designed to articulate and absorb the forces rather than exert traction into the tires like a sports car would.

And I think we all know the Bigfoot theory is merely a smokescreen the nefarious Sasquatch Nation has perpetuated in order to forge their alliance with the Alien Invaders and the CIA 9/11 masterminds...
There you go....Denver Co...
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Old 02-08-2014, 12:11 AM   #17
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Originally Posted by gorillahydrographics View Post
There you go....Denver Co...
Hook me up I want to see a lean !!!
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Old 02-08-2014, 12:18 AM   #18
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Old 02-08-2014, 07:17 AM   #19
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I sometimes think mine leans down towards the passenger side, but I have never measured it. My girl says its an optical illusion with how our driveway crowns, which it does, so I'm sure there's something there too.
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Old 02-08-2014, 11:51 AM   #20
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Lean to the drivers side!, that's opposite of what I think most are seeing.
Yes, my bad again!! I meant the passenger side , sorry.
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Old 02-08-2014, 08:05 PM   #21
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Ok, so I went out to my garage and measured both sides of my rear bumper to the garage floor, both equal and level, or no lean. AEV 3.5" SC lift installed last November.

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