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Jan 5, 2011 | 09:24 AM

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bad vibration

I have a really bad vibration comming from under my 02 F-350 SD diesel , under the drivers seat , u joints ? or other ? Thanks Dave

Jan 5, 2011 | 09:40 AM

99f350sd

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From: Lyndonville, Vermont

Ist look should be tires...Lost a weight? 2wd 4wd? are the hubs locked in? Front axles spinning when they aren't locked in..

Dick

Jan 5, 2011 | 09:45 AM

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I checked the drive shaft & no movement up or down,Does the 4wd shaft spin freely when hubs not engaged ? I have locking hubs & turn the **** in cab.I had the tires rotated & balanced etc.

Jan 5, 2011 | 09:56 AM

wade.jansen

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From: Vail, AZ

Check your rear drive shaft and/or the carrier bearing. Usually when you feal a vibration from your seat it is coming from rear or center of the truck. Front end vibrations are felt in the steering whell or lower firewall.

Jan 5, 2011 | 09:59 AM

99f350sd

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From: Lyndonville, Vermont

while rolling in 2wd the two front axles should not turn..and the driveshaft in front should spin free.

Jan 5, 2011 | 10:10 AM

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Ill check the carrier bearing ' Thanks

Jan 5, 2011 | 11:10 AM

wade.jansen

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From: Vail, AZ

With your hub and transfer case disengaged your front drive shaft should spin free. Now when you are driving it will spin. But there is no load. You would be able to stop the spining with your hand.