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Old 01-29-2019, 03:48 PM   #7
weq92f
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Join Date: Oct 2016
Location: Dallas Texas
Posts: 2,990
Re: Chasing vibration

.
In my daily driver I have a very similar vibration but at/around 70mph. The culprit: The flex disc or giubo. We don't have them in our trucks but this giubo is a flexible coupling between the drive shaft and the transmission output shaft. Once it starts to break down, it introduces enough slop to cause the vibrations.

My guess is that you've got a carrier bearing going bad ( failed ), a shaft that needs some balancing and/or worn/damaged U-joints.

Hth,

-klb
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