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Old 08-06-2019, 02:10 PM
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How can you tell if your JK has been lifted

I"m trying to determine if my JK has been lifted or if its factory. How can you tell. I see Jeeps on the road that look lower than mine but mine doesn't seem to be that high. What do I look for?

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Old 08-06-2019, 02:23 PM   #2
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.... What do I look for?
Ummm, a lift....

Anything not OE. Springs without white tags, different shocks, relocation brackets, adjustable arms, etc etc etc

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Old 08-06-2019, 02:32 PM
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Ok. I have the white tags and the red shocks. No evidence so far. Just curious.
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Old 08-06-2019, 02:40 PM   #4
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Look for spacers, or plastic discs, on top of the springs.


From the pic, it looks like you have some lift. Park it next to a stock jeep and take a pic.
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Old 08-06-2019, 03:40 PM   #5
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Red shocks? Only Rubicon and Willy's have them if I'm not mistaken. Perhaps someone slapped Rubi suspension on it?

That would lift it over a regular Sport.
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Old 08-06-2019, 03:49 PM   #6
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Red shocks? Only Rubicon and Willy's have them if I'm not mistaken. Perhaps someone slapped Rubi suspension on it?

That would lift it over a regular Sport.
It was also a option on the sport as well, at least here in Canada. I think the option was listed as Heavy Duty Off-Road Suspension Package or something along those lines.

Nworker: You could try and get the build sheet, would say on there if you had something like that.
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Old 08-06-2019, 04:42 PM   #7
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Mine had a little 2" spacer lift on it when I got it (used). I wouldn't have known if a 4x4 shop guy hadn't crawled under and looked at it. That little spacer lift caused problems with steering that took an adjustable track bar to fix.
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Old 08-06-2019, 04:54 PM   #8
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That looks lifted or at least leveled.
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Old 08-06-2019, 05:04 PM   #9
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Take a picture from the side. You cant tell at an angle.
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Old 08-07-2019, 08:58 AM
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Old 08-07-2019, 10:55 AM
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Vehicle Description 2012 JEEP WRANGLER SPORT 4X4
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Old 08-07-2019, 11:08 AM   #12
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Aftermarket wheels... ...what size tires? Smallish tires might make a stocker look lifted.

Also, read the digits off the tags on the springs. If HD springs were put on it would lift it an inch or so.
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Old 08-07-2019, 11:10 AM   #13
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optional package references 4 springs. So, perhaps your Jeep came from the factory with a stiffer spring rate. I'm not too familiar with how optional equipment availability for suspension. However, I know that swapping Rubicon coils & shocks from a 4 door onto my 2 door sport gave my Jeep around 1.5" of lift.
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Old 08-07-2019, 11:26 AM   #14
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while we're on the subject...

I have a 2007 wrangler 2 door. It wanders all over the road. it IS lifted. I just ordered all new bushings for every suspension piece front and back. so here's the question: on the two post lift hanging from the frame the rear sway bar is pushing against the tire on the drivers side, 2-or 3 inches away from the tire on the passenger side..is this normal or should I drive it off the nearest cliff???
George in Montana, old fart like to do stuff myself..
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Old 08-07-2019, 11:36 AM   #15
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most likely someone installed coils from a 4 door rubicon so you have a little lift.
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Old 08-07-2019, 11:45 AM   #16
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Quote:
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I have a 2007 wrangler 2 door. It wanders all over the road. it IS lifted. I just ordered all new bushings for every suspension piece front and back. so here's the question: on the two post lift hanging from the frame the rear sway bar is pushing against the tire on the drivers side, 2-or 3 inches away from the tire on the passenger side..is this normal or should I drive it off the nearest cliff???
George in Montana, old fart like to do stuff myself..
Your rear track bar moves in an arch. Since it's attached at the frame on the passenger side and at the drivers side on the axle, the rear axle will always shift towards the passenger side whenever the vehicle is raised. If you describe it as being lifted and it is still using the factory rear track bar, chances are your axle is shifted towards the passenger side even at ride height.
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Old 08-07-2019, 01:39 PM
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Aftermarket wheels... ...what size tires? Smallish tires might make a stocker look lifted.

Also, read the digits off the tags on the springs. If HD springs were put on it would lift it an inch or so.

Currently have 255/75R17 tires.
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Old 08-07-2019, 01:46 PM   #18
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stock suspension. Get out your tape
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Old 08-07-2019, 01:53 PM   #19
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Currently have 255/75R17 tires.
I bet you're going to find that the springs and shocks are donated from a heavier Unlimited and that accounts for your mild lift. I did that to my 2-door when I had one and it worked for 33" tires until I added bumpers, winch, sliders, etc. Then you need 2.5".

So you have a lift but you don't have a lift. That make sense?
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Old 08-08-2019, 11:31 AM
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Another Newb question. So my JK originally had 225R75/16 tires and had a 3.21 Rear Axle Ratio. I know have 255R17/17 tires. Does the gear need to be changed? Since I purchased it used, I really have no idea if it has.
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Old 08-08-2019, 11:38 AM   #21
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Another Newb question. So my JK originally had 225R75/16 tires and had a 3.21 Rear Axle Ratio. I know have 255R17/17 tires. Does the gear need to be changed? Since I purchased it used, I really have no idea if it has.
Does it seem sluggish?
3.21s can spin 32s okay; 3.73s would do it better, of course. But if you're not suffering, don't worry about it.

You can tell if it's been regeared by counting the number of times the driveshaft spins on one revolution of a wheel. 3.21 gears the shaft will rotate 3 1/4 times. 3.73 gears another half a turn. And so on.
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Old 08-08-2019, 01:22 PM
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Does it seem sluggish?

Not too bad. Wife thinks it take a good amount of pedal to get it going compared to her other car but I don't seem to notice it much.



Now I just need her to hang upside down and count the driveshaft rotations. :-)
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Old 08-08-2019, 02:04 PM   #23
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...



Now I just need her to hang upside down and count the driveshaft rotations. :-)
Or use a lift. But I bet she'd be cute hanging there and all...
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Old 08-08-2019, 03:01 PM   #24
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Not too bad. Wife thinks it take a good amount of pedal to get it going compared to her other car but I don't seem to notice it much.



Now I just need her to hang upside down and count the driveshaft rotations. :-)
I did it by taping a piece of string to the drive shaft and rolling the Jeep forward one full rotation of the tire. Then I simply counted how many times the string wound around the drive shaft.
If your Jeep is an auto then different tore sizes need to be adjusted in the computer otherwise the auto trans won't shift right. If you check the speedo against a phone GPS app you can tell if the speedo is right. If the speedo is right the auto trans knows the right times to shift. Don't use the factory GPS for that, as it actually gets its speed signal from the Jeep computer. And if the tire size is wrong there the factory GPS speed reading will be wrong.
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Old 08-08-2019, 05:17 PM
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I did it by taping a piece of string to the drive shaft and rolling the Jeep forward one full rotation of the tire. Then I simply counted how many times the string wound around the drive shaft.

Clever.
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Old 08-08-2019, 07:11 PM   #26
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Not too bad. Wife thinks it take a good amount of pedal to get it going compared to her other car but I don't seem to notice it much.



Now I just need her to hang upside down and count the driveshaft rotations. :-)

Have you seen the Pedal Commander?


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Old 08-09-2019, 06:47 AM   #27
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Clever.
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Old 08-09-2019, 12:46 PM   #28
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I did it by taping a piece of string to the drive shaft and rolling the Jeep forward one full rotation of the tire. Then I simply counted how many times the string wound around the drive shaft.
If your Jeep is an auto then different tore sizes need to be adjusted in the computer otherwise the auto trans won't shift right. If you check the speedo against a phone GPS app you can tell if the speedo is right. If the speedo is right the auto trans knows the right times to shift. Don't use the factory GPS for that, as it actually gets its speed signal from the Jeep computer. And if the tire size is wrong there the factory GPS speed reading will be wrong.
Side-topic here, but does the tranny shift based off of acc pedal position or is that old school thinking?
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Old 08-09-2019, 01:06 PM   #29
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Side-topic here, but does the tranny shift based off of acc pedal position or is that old school thinking?
The modern electronic automatic transmission, as in the JK / JKU, uses a variety of inputs, including speed at the wheels. Sure, it is watching the throttle pedal position. But it is also monitoring rpm and speed at the wheels. Speed at the wheels is calculated based on rpms of the wheel and diameter / circumference of the tire. So if it is wrong about the diameter of the tires it while calculate the wrong speed at the wheels. And that will mess up the shift points.
If it is really wrong it can put the Jeep into limp mode.
There is also something about the automatics where it also needs to know not only tire size but also gear ratio and transfer case ratio. And anything that messes up that info will screw up the way it performs. This is why you can run a four speed Atlas transfer case with a manual trans JK / JKU or with an older 4 speed automatic JK / JKU. But you can't run an Atlas four speed with a late model 5 speed automatic JK / JKU. The computer only allows for two transfer case ratios and as soon as you use a third or fourth ratio it will get confused and likely go into limp mode as the road speed won't match the expectation based on rpms and everything else.
A manual transmission does not have those issues. So, while the speedo might be off if you don't tell the Jeep the correct tire size it does not seem to cause any additional performance issues.
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Old 08-09-2019, 01:21 PM   #30
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....
A manual transmission does not have those issues. So, while the speedo might be off if you don't tell the Jeep the correct tire size it does not seem to cause any additional performance issues.
And your warranty lasts longer because the odo is under-reporting...
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