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Weird vibration.

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Old Jan 22, 2018 | 08:52 PM
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Weird vibration.

I have a 2004 6.0 4x4. When I drive down the interstate I feel a weird vibration in the throttle. It only happens at 1/4 throttle, over 60 MPH and only in 5th gear. If I have my foot in it and let out the vibration will happen when the pedal is retracting and hits 1/4 throttle. Once my foot is off the pedal and I push again it will vibrate at 1/4 throttle then clean up once I’m passed that. Any idea where to start looking?
 
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Old Jan 22, 2018 | 08:56 PM
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ujoints.. take the drive shaft out to check...make sure front axles are not turning in 2wd.
 
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Old Jan 22, 2018 | 09:18 PM
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Well if I’m going to pull the axles I’ll just replace them anyway. Got a recommendation on what joints to get? I know I want greasable. Are all the joints the same same? Front and rear?
 
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Old Jan 22, 2018 | 09:19 PM
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I meant drive shaft not axle.
 
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Old Jan 22, 2018 | 10:15 PM
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Spicer non greaseable is OEM for ujoints. That is all I buy.
 
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Old Jan 22, 2018 | 11:30 PM
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Originally Posted by Firefighter 1406
Spicer non greaseable is OEM for ujoints. That is all I buy.
What he said
 
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Old Jan 23, 2018 | 05:57 AM
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Originally Posted by Firefighter 1406
Spicer non greaseable is OEM for ujoints. That is all I buy.
Got it, are they all the same all the way around the truck?
 
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Old Jan 23, 2018 | 07:16 AM
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I am pretty sure the front axle if different then the rear driveshaft. I think the fronts are slightly smaller.
 
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