Drone noise around 70 mph - Ford Powerstroke Diesel Forum
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Old 10-22-2011, 08:08 PM
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Drone noise around 70 mph

I installed a 4" rough country lift about 2 or 3 months ago. didnt do the shim kit till last month and i just replaced all my u joints and carrier bearing and this "drone" started about a month ago. it rides fine with a slight vibration (which i think is the tires) but when you roll into the throttle and get to 75-and on it got a bad humming/droning noise. its not my exhaust system i know that nor is it the tires. u joints all look good but i cant figure this out. it only does it around those speeds and gets louder the faster you get. and i might mention you can feel it in the seat and in the petal when it does it. also it will do it every time. i cant tell if the shim kit is causing it or if its the axle or what. its driving me nuts being that i have replaced the u joints and carrier bearing
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Old 08-06-2012, 01:20 PM
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drone vibration

Hey my 2004 does the same thing.. I noticed it more after the 6.5" lift, i am positive its the drive shaft angle and pretty sure balancing the drive shaft would help, but cash is tight, so I will live with it.
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Old 08-08-2012, 11:05 AM
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Is youir driveline phased properly?
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Old 08-08-2012, 02:26 PM
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driveline drone

Hello, I just got back from a 250 mile round trip and the noise is getting worse.
I had a shop install the lift back in 2004 after I purchased new, and it spaced the drive shaft center support lower, but I dont think its phazed, I will crawl under it this evening and see if the transfer case output and the pinion are parallel. I noticed yesterday that in neutral with the ebrake set that there is alot of rotational play at the pinion flange , I am thinking maybe the spider gears are toast? I am hoping that that is all it is, since I am broke and out of work... 87,000 miles on the truck, ford rebuilt the limited slip at 60,000 miles.
Thanks for the help!
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Old 08-09-2012, 11:10 AM
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drone

Sorry, didnt mean to hijack this thread, so I started a new one under driveline phasing. .
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