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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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  #1  
Old 04-20-2017, 07:03 PM
MIKE MOG MIKE MOG is offline
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Default 2007 LMM dorne /vibration

Hi, its nice to be back. Can anyone please tell me how to change my pass word from the one emailed to me? I have a 2007, 2500 HD, I have a drone/vibration that I feel in the floor boards and I can hear it. it seems like its worst at freeway speeds. I have put new motor mounts and trans mount in with no change. I can feel it in the exhaust system and on the intake tube under the hood. The drone sounds like a diesel with a straight pipe on it. This truck has 50,000 miles on it and is all stock. has anyone experienced any thing like this?
Than you,
Mike Mog
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Old 04-20-2017, 08:01 PM
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DmaxMaverick DmaxMaverick is offline
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PM sent regarding the password change.
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Old 04-21-2017, 07:37 AM
Kennedy Kennedy is offline
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Check to make sure that the pipes are not sagging and resting on the torsion bar cross member. The stds in the 3 bolt flange also tens to pop off when corrosion heaves them.
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Old 04-23-2017, 06:48 AM
MIKE MOG MIKE MOG is offline
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I checked the pipes and found nothing grounding out. It's really weird. I can feei the vibration in the front tires, the exhaust system and the body but when I touch the frame rail it's a very light vibration. The drone seems to be coming from high on the engine and is more pronounced at the top of the shift points. I can also feel the vibration in the air filter box.
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Old 04-23-2017, 09:41 AM
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Have the front wheel bearings been eliminated as a possible?

Through the years I've had two diesel pickups that drove me to the brink, thinking there was noise coming from the engine. The sounds would come and go with engine speed, which reinforced the thought process. In both cases, it was a bad front wheel bearing that was the root cause of the sounds...
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Old 04-23-2017, 04:00 PM
rapidoxidationman rapidoxidationman is online now
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How are the drive shafts doing? Any play in any of the joints? It might take more than a strong hand to make play evident...
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Old 04-25-2017, 06:40 PM
MIKE MOG MIKE MOG is offline
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Thank you, I will check the u-joints and wheel bearings tomorrow night.
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