3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Vibration on pedal @ 80 mph with A/C on?

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Old 09-10-2009, 12:23 PM
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Vibration on pedal @ 80 mph with A/C on?

I noticed a vibration on the gas pedal around 80 mph when the A/C cycles on and off. Has anyone had this same issue and if so what was the fix? Now that I have noticed it I can't stop feeling it while I am driving. Yes I do know what the speed limit is.
Old 09-10-2009, 02:00 PM
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Mine had a vibration on the brake pedal. And of course when I took it in they couldnt find anything wrong with it.
Old 09-10-2009, 06:58 PM
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I have noticed that in my truck when going down the highway every now and then (65-70 mph). I have not really worried about it. Maybe someone else will know?
Old 09-11-2009, 03:41 PM
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Don't drive 80 mph.... try 78 or 82 just drive around it..

My drivers front tire bounces at 67 mph, nothing @ 65 or any speed above 68...
So I don't drive @ 67 mph NO Bounce
Old 09-11-2009, 04:02 PM
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Only good probability I could give ya are torn/worn motor mounts, but even then, that is highly impossible.
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