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Wrangler "Lean"

flyer92

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A couple months ago, I noticed that my 2-door Sport (with stock suspension) was noticeably leaning to the passenger side and took it to the dealership for a look. They determined that "something was wrong" with the stock rear springs and replaced them under warranty, although they never explained what the problem really was.

Although this seemed to correct the lean somewhat, it still seemed apparent, especially when observing the front of the Jeep. So....back to the dealership again, this time focusing on the front suspension. Not surprisingly, they returned it to me, stating that it was "within spec," even though they agreed that the passenger side was 1/2" lower than the driver's side. The service advisor explained that this is caused by the gas tank running lengthwise under the passenger side of the Jeep, and the extent of the lean would potentially fluctuate depending on how much gas is in the tank.

While that was a good story to hurry me out of the service department, I disagree with the service advisor's opinion because:

-None of the other Wranglers on the lot were leaning, and I never see this on other Wranglers in parking lots, driving down the street, etc.

-Assuming that the eTorque battery and other components on the driver's side would balance out a full gas tank, one would expect that the vehicle would lean to the driver's side or at least level out on an empty tank. However, this never happens. The lean is always 1/2" to the passenger side, no matter if the tank is full or empty-ish.

-As discussed elsewhere in the forums, the springs are apparently designed with different rates to accommodate the weight disparity caused by the gas tank.

Next week, I am taking my Wrangler to a second dealership for another opinion, although I'm prepared for a similar story. :headbang: While the whole gas-tank-balancing theory sounds good, I really doubt that a modern vehicle would be designed this way and suspect that there is something wrong with the suspension, frame, or goodness knows what other "Jeep thing." Just curious if others have experienced the same issue with their Wranglers or have any advice. I will probably install a Clayton lift kit in the near future, but until then, just trying to solve this mystery amid the dealership's dubious theories. Thanks in advance for any feedback and happy Jeepin'!
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AFD

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The lean is always 1/2" to the passenger side, no matter if the tank is full or empty-ish.
Always thought mine leaned a bit to the driver's side, but I'll have to look again. Figured it was just the springs settling in, low fuel or something normal.

Maybe you just need a NFC bumper sticker or to eat a few burgers to even things out? ?

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dpike

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Your Clayton lift will have a left and a right spring. They design their springs to offset the lean from having the fuel tank on the passenger side.
 

3TV

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It's called the JL lean.

They all lean, or at least many of them do. The weight of the gas tank is on the right. The weight of the tailgate and spare tire is on the right (assuming the tailgate latch is adjusted correctly, and all it is doing is holding the gate shut, and not supporting the weight of the tailgate/spare tire). Yes, they really were designed this way.:(

Add 1/2" spring spacers on the right-hand side and it will stop the lean. I had to do that to mine, and many others on the forum have done the same thing.
 

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AcesandEights

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The problem is you can't see it while you're in it. When you're in it, it looks normal, because of your own weight. Maybe you can get someone to take measurements while you're driving and you should see it's much more even.
 

djherdez

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Add 1/2" spring spacers on the right-hand side and it will stop the lean. I had to do that to mine, and many others on the forum have done the same thing.
Did this work for you? Did you have to adjust the upper / lower control arms? Did the spacer affect the ride quality?
I just did a Clayton Overland+ 2.5" lift and the right side lean is definitely noticeable. The 1/2" spacer's on the right seems like the most logical quick / easy / NOT Expensive fix.

Thanks!
 
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djherdez

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The problem is you can't see it while you're in it. When you're in it, it looks normal, because of your own weight. Maybe you can get someone to take measurements while you're driving and you should see it's much more even.
Not mine, it's noticeable while driving it too and it drives me crazy.
 

Zandcwhite

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Step away from the tape measure. These things run light weight springs. The rubicon are 131lbs/in front and 180lbs/in rear or roughly 310lbs/in per side. Sport springs are even lighter. Add 155lbs to 1 side and it's 1/2" lower. 20 gallons of fuel weighs...~160lbs. That side of the Jeep should raise and lower by a full 1/2" with the fuel period. Most people typically drive around by themselves, and yet they obsess over the empty Jeep sitting level. Assuming you weigh at least 160lbs, get in the drivers seat. Your Jeep is now level. Fixed it...for free. Those obsessed with every corner measuring the same, so you always have the same fuel level, same gear in the Jeep, and same passengers? Do you measure with everything in that state? Are you just obsessed with it sitting level in the garage with nobody in it?
 

djherdez

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Step away from the tape measure. These things run light weight springs. The rubicon are 131lbs/in front and 180lbs/in rear or roughly 310lbs/in per side. Sport springs are even lighter. Add 155lbs to 1 side and it's 1/2" lower. 20 gallons of fuel weighs...~160lbs. That side of the Jeep should raise and lower by a full 1/2" with the fuel period. Most people typically drive around by themselves, and yet they obsess over the empty Jeep sitting level. Assuming you weigh at least 160lbs, get in the drivers seat. Your Jeep is now level. Fixed it...for free. Those obsessed with every corner measuring the same, so you always have the same fuel level, same gear in the Jeep, and same passengers? Do you measure with everything in that state? Are you just obsessed with it sitting level in the garage with nobody in it?
Unfortunately, post lift, I still noticed is when i'm driving by myself.
 

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3TV

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Did this work for you? Did you have to adjust the upper / lower control arms? Did the spacer affect the ride quality?
I just did a Clayton Overland+ 2.5" lift and the right side lean is definitely noticeable. The 1/2" spacer's on the right seems like the most logical quick / easy / NOT Expensive fix.

Thanks!
Yes, it worked. I did not need to adjust control arms and there is no affect on ride quality.
 

Zandcwhite

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Unfortunately, post lift, I still noticed is when i'm driving by myself.
Again though, unless it's extreme it is very dynamic. Are you measuring with you in it? Full tank/half tank/ or empty? There will likely be times it's pretty level (typically fullish tank and just a driver) and times where its off by 1/2" or more either way. Unless it's a full inch I wouldn't worry about it.
 
 







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