Vibration between 32-42 mph. - Ford Powerstroke Diesel Forum

 
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post #1 of 4 Old 07-05-2011, 02:01 PM Thread Starter
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Vibration between 32-42 mph.

I cannot figure out what this is. It does not occur until 32 mph, vibrates the whole truck until around 42 mph. At around 40, if I let off the pedal, it goes away for a moment, but comes back if I keep the pedal steady. At highway speeds, it is smooth as can be. I have replaced the u joints, greased the slip joints, and replaced the carrier bearing. I am assuming it is in the driveline, but sometimes it feels as though it is coming from the front left wheel, but I am not sure how that could be, as it stops sometimes when I let off the pedal.
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post #2 of 4 Old 07-05-2011, 02:37 PM Thread Starter
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Just noticed I put this in the wrong section. Sorry.
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post #3 of 4 Old 07-06-2011, 05:10 PM
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Quote:
Originally Posted by strat View Post
Just noticed I put this in the wrong section. Sorry.
Mine does the same thing right around 45mph then stops and is smooth as can be


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post #4 of 4 Old 07-07-2011, 02:58 PM
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mine did the same thing, but at 65-70mph. I crawled under the truck with it in neutral and gave everything a good shake and turns out the drive shaft bolts connecting the drive shaft and the transfer case were loose! I tightened them up and no more vibration.

hope that helps but it sounds like you checked the drive shaft out

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