Vibration.....Help!!!! - Ford Powerstroke Diesel Forum
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Old 03-11-2009, 06:17 PM
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Vibration.....Help!!!!

Ok heres the deal. I got a 99 F250 and I got a vibration that feels like its under my feet on drivers side. I have recently replaced the hub, ball joints, and outer axle shaft on the passenger side as I had abroken ball joint and this stuff on the drivers side seems fine and tight. I can feel it in 4x4 or 4x2. Is there anything in the front end that turns and would cause a vibration when the truck is in 2 wheel drive and the hubs are unlooked? Does the front driveshaft turn when the hubs are unlocked? The front drive shaft does feel a little loose so I thought maybe a u joint but I wouldnt think it would make noise and vibrate in 2 wheel drive unless it turns. What else in the front end?
My other option is the rear drive shaft u joints but they feel tight. What else could I be looking for? I rotated the tires and it didnt seem to make much of a difference but im thinking of getting them rebalanced. Any other ideas to look for to get this annoying vibration fixed?

One more thing to help. When I drive and it is in gear the vibration is there when accelerating or when just cruising but if I take the truck out of gear and just let it coast the vibration doesnt seem to be there near as bad.
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Old 03-11-2009, 06:25 PM
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i would change the u joints and see if it goes away JMO
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Old 03-11-2009, 07:44 PM
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mine does the same thing as of two of my buddies all 99 and one 00 oen of them works for CAT and he said he cant find anything wrong.
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Old 03-11-2009, 07:49 PM
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mine does it but thats from the tires bein unbalanced. It only does it from 40 to 55
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Old 03-11-2009, 07:59 PM
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Typically if you have a vibration that changes with speed only under accel, and is mostly gone when you under a no load coast condition then you should remove the drive shaft and feel the U-joints for roughness or stiffness, you can not find a bad U-joint with the shaft installed unless it is extremely bad, as in way beyond time to be changed. Good luck. Hope this helped.
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Old 03-12-2009, 05:33 PM
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I gotta check u joints. Would it just be the rear u joints to check since it vibrates in 2wd or 4wd and in 2wd the frontdriveshaft dont spin right? Any other ideas on what to check?
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Old 03-12-2009, 05:39 PM
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Quote:
Originally Posted by 99BEIGEPOWERSTROKE View Post
I gotta check u joints. Would it just be the rear u joints to check since it vibrates in 2wd or 4wd and in 2wd the frontdriveshaft dont spin right? Any other ideas on what to check?
Ive heard that these are hard to tow because of the fact that the front driveshaft turns all the time (except neutral?) However if your vibe gets worse under load in 2wd then its probably just the rear. However, I have a place that only charges $30 a u joint (p&l) so if I were having the problem, which I am by the way, then I would just replace all and be done at once.
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Old 03-12-2009, 06:35 PM
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front driveshaft only turns when its in 4 wheel i have mine disconnected right now and it doesn turn
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Old 03-13-2009, 05:24 AM
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Ok I didnt think the front driveshaft turned in 2wd. I will have to check rear driveshaft and u joints. One more thing I have noticed is when I brake it causes the truck to shake and vibrate a little. Would that be caused by the rear driveshaft and u joints as well or do I have another problem in my brakes?
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Old 03-13-2009, 05:30 AM
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Ok i've got the same problem and I've been changing parts like crazy. Ok I would bet its not your driveshaft if you grab it and its tight. To check if it is your front driveshaft just take it out and drive your truck. Today im going to check my needle bearings.
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