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  #13  
Old 11-23-2011, 09:49 AM
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Re: Lurching right after starting

E-brake! ...funny.

No, us americans use the E-brake about as often as the Chicago Cubs go to the playoffs (translation: rarely!).

Regardless of the E-brake being applied, there is no reason that any vehicle should move at all during start up.
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Old 11-23-2011, 10:11 AM
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Re: Lurching right after starting

having same issue on 11 GC hemi, 4k miles on it now. its been happening since 1k miles
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  #15  
Old 11-23-2011, 10:16 AM
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Re: Lurching right after starting

They will take up the slack in the park lock pin.
The torque converter builds up presser and releases the internal clutch.
Modern trans do this. My friends sprinter does this with the merc trans.
If the E brake was used you would not see this.
Basic safety and driving use the E brake
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  #16  
Old 11-23-2011, 12:35 PM
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Re: Lurching right after starting

Quote:
Originally Posted by Deserthucker View Post
They will take up the slack in the park lock pin.
The torque converter builds up presser and releases the internal clutch.
Modern trans do this. My friends sprinter does this with the merc trans.
If the E brake was used you would not see this.
Basic safety and driving use the E brake

I agree that the e-brake should be used everytime which i do but this is an unacceptable issue that Jeep seems to ignore like so many other "normal" things on this SUV.
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  #17  
Old 11-26-2011, 05:02 PM
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Re: Lurching right after starting

I use my e-brake every time I park. Mine lurches also with the e-brake engaged. I believe its a driveline issue. The JGC runs and shifts fine so I'm not in a hurry to do the dealer trip yet. Will see if a TSB surfaces to address this issue along with a couple of others.
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Old 12-21-2011, 12:20 PM
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Re: Lurching right after starting

I have had the same problem since the day I bought the vehicle. It happens 70% of the time and 95% in hot weather. Any thoughts/advice?

Here is a video of the startup at:

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  #19  
Old 12-21-2011, 04:18 PM
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Re: Lurching right after starting

I would say there is one if not more of these conditions causing your issues.

Bad/contaminated trans fluid.
Not enough trans fluid.
Torque converter loss of fluid after shutdown.
Bad converter.
Converter lockup issue.
Converter pump.
Bad trans filter or installation of filter.
Bad programming.
ect.

This is caused by something in the trans, the converter, the fluid or the programming.

I would find a friend with a scan tool and monitor the trans and the converter lockup to make sure all is well and correct.
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Old 12-22-2011, 03:10 AM
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Re: Lurching right after starting

I've had this problem intermittently since TSB 08-035-11 was applied. I would say it occurs in 5% of vehicle starts.

This is on a 2011 Overland Summit 5.7 built in 3/11. This is the only significant issue I've experienced with the Jeep.
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Old 12-22-2011, 09:42 AM
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Re: Lurching right after starting

Quote:
Originally Posted by Escape View Post
I would say there is one if not more of these conditions causing your issues.

Bad/contaminated trans fluid.
Not enough trans fluid.
Torque converter loss of fluid after shutdown.
Bad converter.
Converter lockup issue.
Converter pump.
Bad trans filter or installation of filter.
Bad programming.
ect.

This is caused by something in the trans, the converter, the fluid or the programming.

I would find a friend with a scan tool and monitor the trans and the converter lockup to make sure all is well and correct.
NOT a Torque Converter problem. There are two connections between the Engine and the Output shaft of the Transmission. One is the Torque Converter and the other is/are the Hydraulically actuated Clutches. The Torque Converter will be transferring power any time the engine is running. It would be a problem if it wasn't. In Neutral or Park, NONE of the Clutches should be applied. As in zero, none, nada, never, nothing, etc. To get the vehicle to move forward, AT ALL, the Direct Clutch MUST BE APPLIED. To cause the described symptoms Hydraulic pressure is being applied to the Direct Clutch when it should not be. THAT is where the Diagnosis needs to begin. The issue could be any one of a number of things, and this list can get quite long. But the end result is that the Direct Clutch is being applied when it shouldn't be. A Scan Tool will only tell you what the computer sensor string data is, and what the computer is trying to do with the output devices it controls. Unless you know what the sensor string values, and what the status of the output devices are supposed to be, at any given time and under any given set of circumstances a Scan Tool can be a serious case of TMI.
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  #22  
Old 12-27-2011, 12:21 PM
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Re: Lurching right after starting

I have had my 2011 Overland v6 (june 2011 build date) 1 month and it this has happened once thus far.
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  #23  
Old 12-29-2011, 06:01 PM
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Re: Lurching right after starting

Just got back from the dealer who gave me a print out of STAR Case Number S1121000013 dated 9/7/11.

It addresses the lunge and discusses the driveline needing to unwind on the ignition cycle sequence. The last line is: This condition is normal and cannot be eliminated.

Still not happy that the car lunges forward but it is nice to finally have some info on the issue.
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Old 12-29-2011, 10:26 PM
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Re: Lurching right after starting

I just purchased a 2012 Overland with V8. I have felt this lurching several times at start up in park on level ground. Less than 500 miles.
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