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  #1  
Old 09-22-2011, 08:15 PM
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Jerking motion upon engine start? Easy fellas

When I turn the ignition on my WK2 5.7 jerks forward a little. Has anybody else experienced this? Was at the pumps before and I startled the guy walking in front of me when I started her up. Any ideas?
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Old 09-22-2011, 08:22 PM
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Re: Jerking motion upon engine start? Easy fellas

Roger that I have the same thing there is a thread going on about this and no one has a solution yet.
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Old 09-22-2011, 08:45 PM
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Re: Jerking motion upon engine start? Easy fellas

How interesting..... my P71 Crown Vic squad car did that every time on a cold start. I thought I was going nuts.
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Old 09-22-2011, 09:17 PM
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Re: Jerking motion upon engine start? Easy fellas

Mine does it as well. MY11 Overland w/ Hemi, just on start-up. Problem didn't occur until around 3500 miles.
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Old 09-22-2011, 09:20 PM
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Re: Jerking motion upon engine start? Easy fellas

Yes mine does this. It seems like when it is warm and has only sat for a short period of time. It never does it when its cold. It feels like someone bumped into me it happenens about 4 or 5 seconds after the engine starts.
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Old 09-22-2011, 09:23 PM
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Re: Jerking motion upon engine start? Easy fellas

Quote:
Originally Posted by NHman View Post
Mine does it as well. MY11 Overland w/ Hemi, just on start-up. Problem didn't occur until around 3500 miles.
Holy crap! Guess how many miles mine has on it now?! You guessed it! A tad under 3500! yup mine also only happens on start up.
Does anyone have the link to the thread?
Did anyone take it to the dealer?
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Old 09-23-2011, 12:00 AM
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Re: Jerking motion upon engine start? Easy fellas

Mine also started doing it around 3500 to 4000 miles. I remember the first time it did it I though someone had bumped into me.
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Old 09-23-2011, 07:49 AM
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Re: Jerking motion upon engine start? Easy fellas

crazy, mine does this too. It started last weekend as it just hit 3600 miles.
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Old 09-23-2011, 01:14 PM
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Re: Jerking motion upon engine start? Easy fellas

I just got the jeep back from the dealer today after having the car lunge on start up for about 6 weeks. What i was told is there is some play in the parking pawl in the 545RFE/65RFE (same transmission) and was also because of the torque converter is adjusting upon start up.
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Old 09-23-2011, 01:52 PM
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Re: Jerking motion upon engine start? Easy fellas

Quote:
Originally Posted by Chi-One View Post
How interesting..... my P71 Crown Vic squad car did that every time on a cold start. I thought I was going nuts.
Cause you were....

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Old 09-23-2011, 01:55 PM
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Re: Jerking motion upon engine start? Easy fellas

How far is it moving? If you park too close to something, is this going to make you bump into it? Sometimes you don't have a choice of being parked super close, like when somebody else pulls up to an inch away from you in a parking lot.

Is it all Hemi WK2s, or just some?
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Old 09-23-2011, 02:02 PM
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Re: Jerking motion upon engine start? Easy fellas

I would say it moves about 2 inches. And from what i was told its all Hemi's paired with the 545/65RFE transmission for 2011-2012. This includes Rams, Durangos, and Grand Cherokees.
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