Today, I was going down the interstate at 65. The 2006 Liberty was in 6th gear. I was just going with traffic. When I put my foot on the gas the Liberty pulls/dirfts to the right. When I take off of the gas it pulls/drifts back to the left. Both of these movements are readily noted. It almost feels like someone is pushing my back end around.

I tried this in lower gears at lower speeds and it is just not as noticeable but seems to be present.

Does anyone have a clue as to what is happening?

Is there a gas station in the direction that it's veering?



see this thread as well, sounds like a similar issue as both were pulling right under acceleration

http://www.lostjeeps.com/forum/phpBB3/vie ... hp?t=40596

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03 Renegade (Black)
177k miles 3.7L gas - 45RFE
Command Trac / 4.10s
Lift: ft. 790+ rr. JBA4+
The last of the TrailReady Front&Rear Bumpers and TR Rock Rails
Jarhead Offroad light covers
31x10.5R15 RedLetter Grabbers on Blackrock Dunes
L.O.S.T #KD098632

I see. Thanks.

Seems like we're at least 3 jeeps to have the same problem within a month. I know the libbys before 2005 used a different bushing. I think they created a weak point to protect something else or maybe simply bad engineering to remove vibrations. It looks like it's quite a common problem that a lot of people attribute to torque from the engine but it's all in the bushings.

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2006 CRD KJ, 245/70R16 A/T KO, GDE eco tune, ARB bull bar, OME lift, AVIC-N4, turbo timer, pulsetech solargizer, Racor CCV3500, Racor 245R122 fuel head, Caterpillar battery, oem light bar, KC lights, HID fog lts, cb, ...

Well, when you hit the gas in a RWD vehicle with a decent ammount of torque, you are going to move a bit. If you dont notice it at low speeds and low gears, than its likelly nothing. Also, could be the roads...

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02 KJ "Frank The Turtle"
http://www.cardomain.com/ride/3111598

No this is very noticeable and has not been there in the 70K+ miles I have driven this vehicle. I thought about the roads but it was doing it on 3 different interstates and on state hwy around town. I am going to get the bushings checked.

Could be a alignment or balancing, could be just starting to appear...

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02 KJ "Frank The Turtle"
http://www.cardomain.com/ride/3111598

I just filled the holes in my bushing with urethane and all the yaw is gone. Even at 80 mph, no problems anymore. It's worst on 2005-2006 liberty because of those weakened bushings in the rear lower control arms. As soon as one of the bushing gets weaker than the other, you have that feeling that the truck is swinging on the highway. Mix that with snow and you have a dangerous situation.

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2006 CRD KJ, 245/70R16 A/T KO, GDE eco tune, ARB bull bar, OME lift, AVIC-N4, turbo timer, pulsetech solargizer, Racor CCV3500, Racor 245R122 fuel head, Caterpillar battery, oem light bar, KC lights, HID fog lts, cb, ...

That's very odd,all my bushings on my KJ are solid minus the motor mounts and trans/t-case mount.

The differential doesn't need to move much. Did you disassemble your control arms to inspect the bushings? When I checked mine just by forcing, there wasn't a real difference between both sides and everything looked tight. When I inspected it good, I discovered that one side seemed to be stretched a bit more. I changed both bushing and fill the holes with rtv. It worked for 2 weeks. After jumping over a curb, the rtv, which wasn't fully hardened when I reassembled had squirted out under the force and when I gave it a serious shock, It just tore and that was enough to create yaw again. This weekend I've redone the job with windshield urethane after cleaning everything (see the other post for details) and everything is solid again with no yaw. I've also read on another post that one jeeper had a bolt worn, making his diff move by 1/32" and that was what created the yaw. You truck is 70000 miles, mine is 70000 km but the previous owner was using a trailer all the time which probably created premature wear on the bushings. I drove it today (I'm 40km away from work, all highway) and everything was perfect. My wife drove it back from work and she's pretty rough (the accelerator is like a switch to her, on/off) and no yaw whatsoever. You really have to disassemble the control arms to properly inspect everything. Even a slight movement will cause problems. Let me know what you find.

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2006 CRD KJ, 245/70R16 A/T KO, GDE eco tune, ARB bull bar, OME lift, AVIC-N4, turbo timer, pulsetech solargizer, Racor CCV3500, Racor 245R122 fuel head, Caterpillar battery, oem light bar, KC lights, HID fog lts, cb, ...

I can tell you exactly what it is.....
It is your Ball Joints - most likely upper - and it is probably the one on the side that your jeep veers to.... when you ACCELERATE
What you feel right now - the pulling to one side is exactly what I was feeling before my upper ball joint gave out on the interstate at 65mph
I had been feeling it for almost 4-5 months - maybe more but i never paid attention to it.
Until I almost got killed

please have your dealer check upper and lower ball joints.

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No need to,I know my KJ better then most ever will,It get's a very detailed inspection.Plus no need to take apart anything to inspect any of the bushings,they are very plainly in view.Going to less materiel in the newer models must have been a cost saving thing,mines a '02.

Well it is not the alignment. And everything looks tight. The alignment was way off. Camber this and castor that. But it did not help. It is more pronounced now at lower speeds. Going to the dealer in the am.

It was the right rear control arm. Apparently worn out.

Have any of you had a problem with this? Warranty insurance would not cover it because they said it was normal wear and tear. The dealer says they hardly replace these things and the left side was good. Doesn't sound like normal wear to me.

When you accelerate weight transfer's mostly to the right rear corner,so yes it can be called normal wear and tear since that arm see's the most amount of force when accelerating.

They could have change the bushing (18$ at Morris 4x4) instead of the whole control arm and save you some $$$$. I hate to tell you but it will probably come back. It seems to be an engineering problem on the 2005 to 2007 KJ. As soon as the force get slightly unbalanced on one of the two control arms, here comes the yaw. The fact that those bushings are also "made in Mexico" probably doesn't help. It's been 3 weeks since I fill mine with urethane and no yaw whatsoever. Looks good so far and right now in Quebec, it's the thaw time of the year so the roads are a mess fill with potholes. My suspension is really put to good use and under serious stress.

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2006 CRD KJ, 245/70R16 A/T KO, GDE eco tune, ARB bull bar, OME lift, AVIC-N4, turbo timer, pulsetech solargizer, Racor CCV3500, Racor 245R122 fuel head, Caterpillar battery, oem light bar, KC lights, HID fog lts, cb, ...

The dealer acted like it was very unusual. At least I know where to get a part now. Thanks.