Serious/Annoying Vibration - Ford Powerstroke Diesel Forum
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Old 07-01-2014, 04:42 PM
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Serious/Annoying Vibration

Hey guys here's the scoop, I have a 2000 f350 with 199,500 miles on her. She has a 4.5" Icon hanger kit lift(approx. 3 years old) and new 285/75/16 Toyo Open Country AT tires as of yesterday and while having the tires put on I had them check alignment also. I replaced all three u joints and carrier bearing approx. one month ago. While driving I am getting a pretty good vibration and i'm not sure where it is coming from, once I hit about 45 mph it starts and around 65-75 it is almost unbearable. It seem while i'm at highway speeds it seems to kinda go away when I let completely off the pedal. What is your guys take?
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Old 07-01-2014, 05:49 PM
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When did it start? Do you feel it more in your seat or your steering wheel?
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Old 07-01-2014, 05:56 PM
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It has been this way for a little while now not really sure when it started. I feel it more in the seat, I noticed the steering wheel feels pretty smooth.
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Old 07-01-2014, 07:28 PM
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How high did you lift the rear? Did you shim the carrier bearing? Have you ever pulled the slip yoke apart?
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Old 07-02-2014, 02:50 AM
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Is the drive shaft in phase?
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Old 07-03-2014, 06:59 PM
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The drive shaft has never been taken apart so it should still be phased correctly. Today I decided to pull the rear driveshaft and throw it in 4x4 and take her for a drive and see what would happen, I found that there was no vibration at all now from 0-90mph. What are the best u joints for super dutys and how much should the carrier bearing be shimmed with this setup. I never did shim the carrier bearing.
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Old 07-03-2014, 07:31 PM
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What's your arrangement? Sclb or scsb. I'd use spicer, Moog or oem for U-joints. My guess is 1"-1.5" of spacer but it all depends on your arrangement.
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Old 07-03-2014, 07:35 PM
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Extended cab long bed
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Old 07-03-2014, 07:45 PM
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1.25". If you get a small vibration on take off add an 1/4". Also replace your carrier bearing. If you don't feel like messing with the u joints and carrier bearing take if to a drive line shop and have them replace everything and do a balance.
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Old 07-03-2014, 07:51 PM
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How often does a driveline need to be balanced or only when you're having issues? Where did you come up with a 1.25", just wondering for future reference.
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