driveline vibration
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Joined: Dec 2006
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From: Henderson, Ia
driveline vibration
I have been chasing a vibration on my 99 in what I think is the driveline. It is worst between 40 and 50 and can feel it in the floorboard and SOTP. So far I have replaced the carrier bearing and had the rear driveshaft balanced and u-joints replaced to no avail. Tonight I jacked one side up at a time and ran it, the vibration was still there by doing it that way. It seemed like I could hear more of a noise with the drivers side jacked up than on the passenger side. So I took the cover off the rear diff to see if I could come up with anything. There is a noticeable amount of up and down movement on the inside bearing especially on the drivers side and some side to side movement. Has anyone experienced this before? How much if any movement should there be? Any write ups on how to R&R or what to look for? As always any help or direction is greatly appreciated.
Laughing Gas
Joined: Aug 2009
Posts: 1,192
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From: Belgrade, MT
Axle
I haven't been into the axle short of fluid changes. That said, I have chased these vibrations quite a few times.
Check ALL u-joints on the rear shaft, one dry cap can play hell with you.
The U-joints on the fron axle knuckle can do the same, even not locked in they spin to a certain degree.
The fron axle unit bearings also cause a vibration.
A bad hub on a 4x4 will cause the front ujoints to sag and vibrate.
Bad needle bearings in the front unit bearings will cause a vibration, but it will go away to an extent if you lock the hubs in.
Hope that helps some and the issue is not in the axle.
Check ALL u-joints on the rear shaft, one dry cap can play hell with you.
The U-joints on the fron axle knuckle can do the same, even not locked in they spin to a certain degree.
The fron axle unit bearings also cause a vibration.
A bad hub on a 4x4 will cause the front ujoints to sag and vibrate.
Bad needle bearings in the front unit bearings will cause a vibration, but it will go away to an extent if you lock the hubs in.
Hope that helps some and the issue is not in the axle.
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schlepprock250
1999 - 2003 7.3L Power Stroke Diesel
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Jul 17, 2009 11:34 AM
