Mysterious Vibrations - Ford Powerstroke Diesel Forum
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post #1 of 24 Old 09-05-2013, 03:29 PM Thread Starter
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Mysterious Vibrations

For the life of me, I cannot diagnose this problem putting me at wits end.
Will be traveling at any rate of speed, hit a bump and instant drivetrain vibration as if going over a rumble strip. Hit another decent bump and goes away or come to a stop, hear a clunk and then it is fine. Process repeats, ad infiniteum. Driving me bonkers!! Please advise!
2002 F350 dually crew cab lifted 6 inch 35inch tires procomp traction bars. New within 1000 miles: Timken bearings all around including carrier/pinion bearings, Detroit True trac,alignment, tires rotated, gear box, tie rod ends, pitman arm, ball joints, steering stabilizer and shocks. U-joints don't seem suspect/no binding. Sway bars are all tight. This all occurs with manual locking hubs removed.
I will be eternally grateful for any and all advise, thanks.
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post #2 of 24 Old 09-05-2013, 03:44 PM
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Anytime I hear "rumble strips" as a symptom (plus coming & going kinda clinchs it) I say - Needle Bearings!!!

Is your truck 4WD? Lock the ft hubs (manually) one at a time. If the noise goes away it's the Locked sides needles....

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post #3 of 24 Old 09-05-2013, 04:14 PM Thread Starter
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Would that still occur without the locking hubs installed? Someone stole mine so I've been running without them. I didn't think the interior needles moved without the hubs installed.
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post #4 of 24 Old 09-05-2013, 04:25 PM
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It actually works the other way, without the hubs the tire spins independently of the stub axle (thus needing the needles to ride on the axle) BUT, when locked the stub axle and the tire turn together and the needles aren't doing anything...
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post #5 of 24 Old 09-05-2013, 07:40 PM Thread Starter
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I will follow the recommended procedure and see what happens. I sincerely hope you are right. Thanks
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post #6 of 24 Old 09-06-2013, 09:45 AM Thread Starter
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No luck. I replaced the needle bearing b-2110 and is still shaking like a sick dog. Stub axles look okay. Any suggestions?
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post #7 of 24 Old 09-07-2013, 05:22 AM
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Are you still driving it without hubs? I'm not sure how that would effect things...
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post #8 of 24 Old 09-07-2013, 05:57 AM
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So I take it this was not a problem until after all the front end work you listed? This almost sounds like some form of death wobble. Have you looked into that possibility?
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post #9 of 24 Old 09-07-2013, 07:02 AM
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How many miles are on the truck? Could be planet gears on the input shaft of transfer case, or tail bearing of transfer case.

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post #10 of 24 Old 09-08-2013, 06:08 AM Thread Starter
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I have been driving without the hubs in, however this never happened before with them out. There are 256xxx miles on truck. Also this is all occuring in 2wd. Recently I ziptied the front axle knuckles to the ball joint mount to keep them from moving. So far I havent had a vibration. What could this mean? The front driveshaft doesnt rotate, but somehow the knuckles are.
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