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Old 04-25-2006, 05:56 PM   #1
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I am getting a vibration that starts at 50 and stops at 55 mph. It is very smooth on either side of that speed. Any ideas before I bring it to the dealer? It is a four Winds 24T with slide. E450 chassis. Less than 5K miles. Thanks. Scotty.
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Old 04-25-2006, 05:56 PM   #2
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I am getting a vibration that starts at 50 and stops at 55 mph. It is very smooth on either side of that speed. Any ideas before I bring it to the dealer? It is a four Winds 24T with slide. E450 chassis. Less than 5K miles. Thanks. Scotty.
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Old 04-25-2006, 07:44 PM   #3
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You've got a tire & wheel out of balance, which any tire shop can easily remedy [unless it is really far out of whack]. Not a warranty issue unless it has been like that since day one. You probably hit a pothole or curb and knocked it slightly out of balance. Or maybe one of the original balancing weights simply loosened and fell off.

I'd just go to a tire shop and have them balance the front wheels again.
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Old 04-26-2006, 01:31 PM   #4
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Thank you, wil do.
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Old 05-21-2006, 01:35 PM   #5
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Several years ago we had a Gulfstream 29' on the E450 chassis. I had the same issues as you and each dealer told me it was the tires. I had them balanced many times and never resolved the 55mph vibration.

My solution was to have the drive shaft balanced. The mechanic thought I was throwing my money away but that solved the problem. We both learned something that day.

It appears that Ford does a poor job of weigting and balancing the shafts. I strongly recommend looking into that.
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Old 05-22-2006, 10:39 AM   #6
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Fxrscotty,

I would definitely check out the wheel bal first, as Gary suggested, but I had the same problem with my 89 Pace and it eneded up being the driveshaft balance / angle phasing. I would think that you would have a single piece driveshaft, so the angle wouldn't be an issue.

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Old 05-22-2006, 11:06 AM   #7
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Why do vibrations show up at certain speeds? Because the vibration is masked until the mounting point or carrying structure harmonically vibrates as well.

Common causes related to vehicle speed:
a) out of balance tires
b) out of round tires
c) driveshaft balance
d) pinion angle

Probably others I can't remember. We Jeep owners who lift and put bigger tires on deal with these issues all the time. We don't see the driveshaft issue too often, but the others are regular issues.
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Old 05-23-2006, 03:18 PM   #8
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I have an appointment for the dealer to test drive and then will fix what ever it is. i will let you all know what it turns out to be. scotty.
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Old 05-23-2006, 04:49 PM   #9
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I had a similiar problem witha 1999 E450 on a Minnie Winnie. Ford truck dealer insisted it was either front end alignment or tire balance. So I let him balance and align and it still shook, and he agreed finally to check the drive line. Shaft was balanced OK, but it was out of alignment and had a bad u-joint.

Ken
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Old 06-06-2006, 06:12 PM   #10
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Had the tires balanced today and seems to have cured the problem. Thanks to all that offered help. Scotty.
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