Highway rumbling noise - Ford Powerstroke Diesel Forum
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  #1  
Old 10-10-2013, 06:02 PM
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Highway rumbling noise

I have a 2000 Excursion 7.3. I am having a weird vibration noise which only occurs at 52-55mph and up, most often at light to no throttle. When it occurs you can often throttle it more to get rid of the noise. It is like a rumble strip noise.

I have already replaced both stub shafts, all front seals, both wheel bearings, e.t.c, the whole front end. All u-joints are new as well.


I was thinking it might be the rear driveshaft angle (but didn't have any problems before), or the torque converter.

Any thoughts?


Thanks,

Ben
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Old 10-10-2013, 08:14 PM
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Broken spring? You replaced all the u-joints... Did you witness mark the shafts and get them back on the same? Have you balanced the tires lately? Does it change with speed or RPM? There is a difference. Speed means you're looking in the right area, RPM means you're not. Try the same RPM at a lower speed to see if you notice the same vibration (maybe attenuated some, but there).
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Old 10-11-2013, 01:48 AM
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Yes I marked all the shaft parts and installed them in the same order. Tires where balanced and rotated to see if noise changes. The noise seems to be engine load dependent and only noticeable at speeds above 50mph.
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Old 10-11-2013, 01:54 AM
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Lots of Super Dutys do this... Most do it at 42-45 mph, not sure why and a lot of guys have changed several parts without any luck in fixing the problem. Someone once it has to do with the road giving the suspension a perfect harmonic imbalance to cause the problem... Let us know if you figure it out. Only thing I tried was replacing my unjointed and carrier bearing but still have the same thing.
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Old 10-11-2013, 02:37 AM
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Yea it is just soo annoying driving with this noise sometimes!!!
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Old 10-11-2013, 02:40 AM
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Is it a noise or a vibration?
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  #7  
Old 10-11-2013, 02:33 PM
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Its more of a noise, but sometimes you can feel it. Front sway bar and driveshaft have already been removed but the problem remains.
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