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Old 12-08-2012, 07:12 PM   #1
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'06 LJ Jerking Problem

Hi,

I just bought an '06 LJ, and I have an occasional problem, in that when I take off from a stop, it has a tendency to start jerking, fore and aft, either until I let off the gas, or I hit the clutch. You can especially hear it in the transmission, w/the gears.

Is there an issue w/my transmission, or is the throttle out of adjustment, or is it something else?

Thx.


.

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Old 12-08-2012, 07:22 PM   #2
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Sounds like clutch chatter. It could be a number of things, but aren't limited to:
1. Wrapped flywheel/someone resurfaced the flywheel.
2. The rear main seal is leaking oil onto the clutch.
3. You've got glazing on your clutch/flywheel.


While letting the clutch out from a stop, give it a good bit of gas and hold the clutch at the contact point. It will wear down a little of the clutch and burn off the "glazing" if there is any. Take it for a ride and see if it still chatters after that.

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Old 12-08-2012, 07:23 PM   #3
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could be a few things. could be as simple as a tranny mount, or driveshaft.
just wondering, how do you have a 4.2L ?
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Old 12-08-2012, 07:28 PM   #4
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Originally Posted by kewlkarim View Post
could be a few things. could be as simple as a tranny mount, or driveshaft.
just wondering, how do you have a 4.2L ?
Good catch. I'll get it fixed.

Thanks

Are the LJ 6 speed M/T's fairly loose, or is it a sign of wear?

.
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Old 12-08-2012, 08:01 PM   #5
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Hey GoHack,

Did the engine light come on or throw a code? Could be the cam sensor, crank sensor, or the map sensor.

Regards, Hamshog
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Old 12-08-2012, 08:31 PM   #6
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Originally Posted by Hamshog View Post
Hey GoHack,

Did the engine light come on or throw a code? Could be the cam sensor, crank sensor, or the map sensor.

Regards, Hamshog
No nothing.

It especially happens when the engine is cold, and then not always.

It just starts jerking. Again, maybe the foot petal, and/or throttle is just too sensitive and out of adjustment.

I've got an appointment Monday at the dealer to get all the service work finished up on it, as well as have the Distributer checked out, so I'll check w/them then.

Hopefully it's nothing major, because I'm planning on having a locking hub kit installed on it, as well as all new bearings in the front axle and drive shaft, and a locking differential, next week.



.
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Old 12-08-2012, 08:43 PM   #7
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Sounds like the same thing my '05 does. I checked all the mounts, cleaned the IAC, changed the plugs, and put an extra spring on the throttle. The extra spring is the only thing that showed any improvement. Mine will do it hot or cold, mostly when I'm trying to go very slowly like when traveling through a parking lot with my foot barely on the throttle. It will start to "buck" and will just keep getting worse until I push the clutch in.
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Old 12-08-2012, 08:57 PM   #8
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Originally Posted by c1skout View Post
Sounds like the same thing my '05 does. I checked all the mounts, cleaned the IAC, changed the plugs, and put an extra spring on the throttle. The extra spring is the only thing that showed any improvement. Mine will do it hot or cold, mostly when I'm trying to go very slowly like when traveling through a parking lot with my foot barely on the throttle. It will start to "buck" and will just keep getting worse until I push the clutch in.
Exactly.

Here's a link to someone w/the same issue.

http://www.wranglerforum.com/f5/driv...lp-200494.html


.
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Old 12-08-2012, 09:48 PM   #9
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It used to happen to me when I first got my LJ. You have to be smooth with the throttle in 1st and 2nd. Any on/off/on with the gas pedal will induce the bucking.
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Old 12-09-2012, 12:54 PM   #10
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Originally Posted by GoHack View Post
Exactly.

Here's a link to someone w/the same issue.

http://www.wranglerforum.com/f5/driv...lp-200494.html


.
This is not what I get, I have no drivetrain issues with bumps.

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