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Old 05-15-2013, 11:04 PM   #1
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Bran new 13' unstable

I have owned a 01' sport and a 04' Rubicon. I just bought a 13' sport. It has 600 miles and completely stock. When driving on the freeway at around 65 to 70 mph the jeep begins to sway back and fourth. Best way i can describe it is if your behind a diesel trailer and when you fall back out of the draft zone you hit the wind vortex off the trailer and it sways your vehicle. There was no wind and the free way had no groves in the pavement.

I have never encountered this in either of my other wranglers. Im starting to have buyers remorse. I have a vacation planned in June for my 7 year old boy and I to go to Tahoe and now I am second guessing the trip because of this. You guys/gals have any ideas?

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Old 05-15-2013, 11:05 PM   #2
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A few thoughts: you mention it has 600 miles on it. Did it get driven as a demo? Can the dealer check the alignment?

Also, check the tire pressures and make sure they are all correct. Our '12 and '13 do NOT have that problem.

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Old 05-15-2013, 11:06 PM   #3
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Let me add that I feel no vibrations in the steering. It almost feels like its all in the back end.
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Old 05-15-2013, 11:06 PM   #4
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Check tire pressure? Kinda sounds like you have too much air in tires
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Old 05-15-2013, 11:08 PM   #5
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Sorry let me clarify. The jeep had 74 miles when i drove it off the lot. But it started right away. I have owned it for 15 days now.
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Old 05-15-2013, 11:17 PM   #6
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Take it back to the dealer and drive some others along with the techs to get it looked at under warranty. That's not typical. Perhaps your rear swap bar is disconnected or some such thing.
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Old 05-15-2013, 11:39 PM   #7
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Neither one of my 13's feel unstable and both have been to well over highway speeds. I second the tire pressures in questions. Afted I put 35's on my jk it felt really bad at 35mph. Tire pressures were to high, since droping it feels stable at any reasonable jeep speed.
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Old 05-16-2013, 12:31 AM   #8
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Take it back to the dealer and drive some others along with the techs to get it looked at under warranty. That's not typical. Perhaps your rear swap bar is disconnected or some such thing.
Yea thats exactly what it feels like, the rear sway bar. Ill call the dealership tomorrow. In the mean time ill double check the tire pressures.
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Old 05-16-2013, 01:01 AM   #9
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Tire pressure and alignment . Mine came from the factory out of align and max psi on the tires.It floated around pretty bad till I let some air out and later did the lift and had it aligned.Its pretty stable now.Its seen some not so legal speeds and does as well as can be expected for a brick on wheels.
My sons TJ with 150k miles drives better than my JK did off the lot with 7 miles on it.Amazing what tire psi can do.
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Old 05-16-2013, 01:10 AM   #10
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Sounds like crosswind to me. How do you know there was no wind? Crosswind at 50mph+ is FAR different when felt at a standstill.
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Old 05-16-2013, 01:37 AM   #11
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My 2 day old JK is doing the same, I want to believe its tire pressure on mine
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Old 05-16-2013, 08:11 AM   #12
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I hit 85 on the highway more often than I should, and it feels very stable. I mean, as stable as a brick going 85 can feel. It's no different than my wife's Explorer.
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Old 05-16-2013, 08:23 AM   #13
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My Wrangler has solid axles, recirculating ball steering, and a near vertical grille and windshield.

It's always unstable.
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Old 05-16-2013, 08:45 AM   #14
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My Wrangler has solid axles, recirculating ball steering, and a near vertical grille and windshield.

It's always unstable.
X2, Especially if its a 2-door.
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Old 05-16-2013, 08:48 AM   #15
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X2, Especially if its a 2-door.
Yep. 2-door.

I can't find the center of the steering wheel on the freeway.
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Old 05-16-2013, 08:55 AM   #16
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My 2013 also has an unstable feel to it at higher speeds, like you are describing...no vibrations, just swaying slightly. I feel like I have to fight to keep it straight. I'm a car guy and my background has always been sports cars with stiff suspension (M3, Si, 04 cobra) so maybe I'm just not used to a larger car. I'll start with checking the alignment as suggested here.
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Old 05-16-2013, 09:00 AM   #17
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I actually had my Sahara going 90mph the other day with the top off, without even realizing it till I looked at the speedo. THeres a lot of wind noise, but the vehicle feels very stable at that speed. I would imagine that there is something wrong with yours.
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Old 05-16-2013, 09:08 AM   #18
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I actually had my Sahara going 90mph the other day with the top off, without even realizing it till I looked at the speedo. THeres a lot of wind noise, but the vehicle feels very stable at that speed. I would imagine that there is something wrong with yours.
Agreed. I have drove my '13 JKU on the freeway at 75mph on a few occasions ... no problems like you describe and I am accustomed to driving a compact car.
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Old 05-16-2013, 09:50 AM   #19
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I drove a Super Duty for years, so the 2dr fells like a sports car to me. However, the shocks on the Sport models suck. I already have a set of Rubicon take offs sitting in the garage to replace them.
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Old 05-16-2013, 10:06 AM   #20
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I have a 2012 JK Sport 2dr with 245/75/16 Mud tires, and it is very stable at highway speeds, top on or top off.
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Old 05-16-2013, 08:40 PM   #21
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Sounds like crosswind to me. How do you know there was no wind? Crosswind at 50mph+ is FAR different when felt at a standstill.

The days that I really noticed this were completely still. Not a breeze or leaf moving and 95 degrees. I looked under the jeep today and checked the stabilizer. Everything felt solid. I made an appt with the dealer to check the alignment.
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Old 05-16-2013, 09:28 PM   #22
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My 2013 is totally stable
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Old 05-16-2013, 09:37 PM   #23
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I know mine is a 2010 but the suspension hasn't changed. My 2 dr has always been stable on the highway at 75MPH even with 35's now. I won't admit to going 80 but I would venture it doesn't there either
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Old 05-16-2013, 11:18 PM   #24
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Tire pressure is set really high at the factory, mine is 39 psi and goes up to about 41 when they're hot.

I've only felt something like you're describing when I'm on the freeway on a windy day... or when a semi goes by and the draft affects you. It's a high profile, box on wheels. It catches wind very easily. I also agree about the 2dr Sport's 'spongy' shocks... I'm sure some stability could be gained by swapping some heavy duty ones in there.
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Old 05-17-2013, 12:17 AM   #25
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Checked tire pressures and they were at 32 psi. I bumped them up to 35 per door jam specs. Ill get the alignment checked and call it a day. Gives me a reason to fast track the tire and wheel upgrade.
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Old 05-17-2013, 04:34 AM   #26
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I'll throw my hat in the ring on this one too. MY 3012 Rubicon feels rather unstable at anything above 35 or 40 miles per hour.

I checked tire pressure and they were set at 40 to 41 PSI. I dropped them down to 35 and it seems to have gotten better, but still has some sway/drifting. Someone mentioned it could be a sway bar - and that's exactly what it feels like - like it's not even there. Crawled underneath and checked everything and it all seems tight.

Could be that I'm not used to it (coming from a Mustang GT), could be something else. I'm keeping my eye on it.
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Old 05-17-2013, 05:31 AM   #27
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Old 05-17-2013, 06:06 AM   #28
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The day we drove our Jeep home from the dealer it did exactly what you described and scared the hell out of me as I thought I discovered death wobble in a brand spanking new vehicle. Turned out that I drove through a stretch of road that had major problems as a couple of days later I drove that same section and it jostled my car almost identically (though not nearly as bad). But I do know tire pressure can really affect the way a 2 door Jeep handles so be sure it's not aired up to 35 or more PSI.

BTW, my Jeep on 285/17s still drives pretty lousy on the highway but I blame that on the short wheelbase. But if you're on stock steelies those wheels are just too undersized for such a tall vehicle because once I replaced mine my Jeep handled much better (though I still need 2-hands on the wheel over 55).
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Old 05-17-2013, 07:08 AM   #29
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Well spending my first week with the 2013 after 3 years with my 2008 there is a noticeable difference in handling. Can't imagine the 17" wheels on the 08 could make that much difference over the 18" wheels on the 14, so it's gotta be something else. I do find that the 2013 feels like it sways. Was thinking it was just a new car that I would get used to, but after reading this thread I think you guys are on to something here. Time will tell, but I have not felt unsafe at all even at 70mph on the thruway.
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Old 05-17-2013, 07:21 AM   #30
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I'll throw my hat in the ring on this one too. MY 3012 Rubicon feels rather unstable at anything above 35 or 40 miles per hour.
The 3012 Rubicons are out already!! I can't wait to see that lol jk

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