Vibration at 35-47 mph - Ford Powerstroke Diesel Forum
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Old 09-05-2012, 07:01 AM
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Vibration at 35-47 mph

I have a 2005 F-350 HD Edition, stock. Last month I pulled out my big trailer to adjust the brakes, just a few miles run around town and I never stepped on it heavy. Later that day I took just the truck out and it had a new vibration between 36-47 mph. I figured I had grooved my universals so I put three new joints on the main driveshaft, but that didn't help. So then I changed out all four tires, I put on an old set of winter tires, but I'm still vibrating exactly at those same speeds. After 50 mph it's completely smooth.

Anyone have any ideas???????????
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Old 09-05-2012, 07:58 AM
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Did you check the carrier bearing? How about the front axle u-joints? How's the hub bearings?
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Old 09-05-2012, 08:18 AM
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Get the shaft re balanced..Fixed my issue
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Old 09-05-2012, 08:23 AM
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I'm no pro but you can jack up the rear end and put it on jack stands. Run it very careful to about 40 to 50 and have somebody look under truck to see if it is coming from rear end or drive shaft area. It worked for me on my jeep. I found out it was rear end. Plus it would eliminate the whole drive train. Did you check your front and rear end gear oil. Good luck
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Old 09-05-2012, 11:25 AM
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Fluids are all good. There's no bearing whine and the vibration is considerable, the tools and stuff in the doors rattle, and I can't see out my rear view mirrors. It shakes the same whether on 2WD or 4WD, OD or Tow haul, in gear or in neutral. For example if I throw it into N at 60 mph it's smooth until it hits 50mph and then if vibrates all the way down through the 40's. I haven't pulled anything else apart but all looks tight, pinion bearing is definitely tight.
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