Bad vibes when going 70+ MPH - Ford Powerstroke Diesel Forum
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Old 06-30-2013, 02:59 PM
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Bad vibes when going 70+ MPH

I get this almost grinding sound, or vibes when I am going over 70 mph in my truck. It just got a new hub installed a month ago and the vibes are still there when I get up to 70 mph. This is driving me nuts, ive changed carrier bearings and all that ****. All my driveshafts are solid, no play. It sounds like its coming from under my feet. Whenever I get on the gas it goes away, but when i left off it comes back for a second. It goes and comes with acceleration once you get up to 70 mph. Thats why I originally thought it was with the driveshaft. I am running a 6" lift on 37 inch tires and I noticed im still running a single steering stabilizer. I was thinking maybe if this was bad it could be the cause of all my problems? I'd love to upgrade it to a dual stabilizer. If anyone can shed some light on this i'd appreciate it.
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Old 06-30-2013, 03:47 PM
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When was the last time that your tires were balanced? I have read several times over about that mystery vibration being tire balance.

I had my sway bar out for awhile and re-installing it helped with some bouncing that I was having around 50~55 mph.

Is your carrier bearing lowered? If so, was it lowered with a wedge shaped spacer or a square shaped? A wedge shaped drop would rotate (clock) the bearing and eliminate binding.
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Old 06-30-2013, 04:07 PM
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the tires have 9k miles on them, so they should still be in balance. The carrier bearing is not dropped, its at stock height. and its not really a bouncing condition.. it doesnt increase or decrease when taking curves or anything. Im really stumped on this
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