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  #1  
Old 08-03-2010, 12:42 PM
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Default Vibration, any ideas. Dealer didn't have any clue.

Well my truck has a slight/moderate vibration reverberating through the pedals and steering wheel/column. It happens at any speed. The best I can tell is that it happens when the ECO light comes on. I took a test drive with a shop foreman at the dealer and he didn't know what it was. He said "I haven't driven enough of these to know if it's an inherent problem." Anyone else having the same problem or any idea as to what it might be.
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Old 08-03-2010, 12:54 PM
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I am just going to guess and say its just a vibration because half of your cylinders are becoming compression release cylinders with no function, as, when the ECO light comes on, it becomes a 4 cylinder for gas mileage.
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Old 08-03-2010, 01:00 PM
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Are we even sure the truck has a Hemi? If so, when it goes into MDS mode, compression isn't released. The valves stay closed and the air in the cylinders remains trapped, acting as an air spring until MDS is deactivated.

Is the vibration noticable only while driving the truck or do you feel it while stopped in or out of gear?
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Old 08-03-2010, 02:59 PM
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Quote:
Originally Posted by Remerson228 View Post
Are we even sure the truck has a Hemi? If so, when it goes into MDS mode, compression isn't released. The valves stay closed and the air in the cylinders remains trapped, acting as an air spring until MDS is deactivated.

Is the vibration noticable only while driving the truck or do you feel it while stopped in or out of gear?
Sorry I should have mentioned the engine size. It's the 4.7 (non-hemi). I only notice it when driving, it does not display the same behavior when idle.
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Old 08-03-2010, 03:10 PM
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Sounds like you either need to call Chrysler customer assistance or find a new dealership.
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Old 08-03-2010, 07:02 PM
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lost a wheel weight? mud inside the rim? shifted tire belt?
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Old 08-03-2010, 08:42 PM
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If 4X4 could be cv joint. Any off road use or hit any big ass pot holes? Bent a wheel, shaft or broken motor/trans mounts. Over heating breaks can warp rotors.

Just a few that come to mind.
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