Vibration Problems around 55-65mph - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 01-27-2014, 04:37 PM Thread Starter
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Vibration Problems around 55-65mph

I have been getting a vibration right between 55-65mph. It stops when I accelerate, it weakens when I let off the gas and I don't press the brake, and is worse when I maintain 60mph. It feels like I am driving on a rumble strip on the side of the freeway.

Any ideas of what it may be is greatly appreciated
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post #2 of 4 Old 01-27-2014, 05:44 PM
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Speed specific is usually a balance problem in my experience. Check tires first , then start looking at alignment , ball joints , tie rods , wheel bearings , pitman or idler arm. Check u joints. If tires are newish it could be a tire , just fought a vibration on my wife's tahoe for months , had several shops look at it , diagnose it , then I'd bring it home and replace parts as it was beyond anything I was finding. A road force balance finally revealed a tire that a regular balance never picked up and cured the problem.

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post #3 of 4 Old 01-28-2014, 04:54 AM
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start with u joints in the drive shaft and have a shop check the balance. i lost the weight on my rear drive shaft and it caused a vibration at 70. the other thing was the u joints on the front axle. replaced both front wheel bearings and still had the same noise at 70 that sounded like a bad grumbling wheel bearing. ended up being a drivers side u joint was bad.
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post #4 of 4 Old 01-28-2014, 06:09 PM
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either tires or driveshaft, my brothers was a shake at the same speed when the drive shaft went.

2001 Ford Excursion

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