Rear Diff Whining - Ford Powerstroke Diesel Forum
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Old 11-12-2012, 11:10 AM
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Rear Diff Whining

I have 2006 F250 6.0. The rear end has just started to howl. It sounds like worn out tires on pavement, but makes the same sound when on a gravel road. It gets louder as I go faster, and there are no gear noised which are noticable, no grinding or anything. I checked the U-joints (no slack), checked the rear diff oil, its up to the fill hole but it does have an orange color to it. Is that normal? And what could be the cause of this whine? HEEEEELP!!! So I dont get sruck going to the Dealership.
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Old 11-12-2012, 11:20 AM
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Drop the drive shaft and then check for play, or lack thereof by twisting the flange back and forth. There shouldn't be much play. Ring and pinion issues are hard to diagnose online, too many if/thens. If you're not versed in gears take it to a mechanic, whinning r&p usually means r&r.

sent from a dumb guy with a smart phone
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Old 11-12-2012, 05:00 PM
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pinion bearings

this orange color you speak of? could it be rust?
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Old 11-12-2012, 07:11 PM
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............
I don't know. I normally have this thing serviced at the dealer so I've never had to touch the rear end. But I have heard that there is an additive for the clutched in the rear end. It may be that I suppose? ..................

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Originally Posted by sinner6.0L View Post
pinion bearings

this orange color you speak of? could it be rust?
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Old 11-12-2012, 07:12 PM
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I don't know. I normally have this thing serviced at the dealer so I've never had to touch the rear end. But I have heard that there is an additive for the clutched in the rear end. It may be that I suppose? ..................
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Old 11-12-2012, 10:34 PM
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Mine was whining. I ended up getting a new rear end. There was metal on metal.
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Old 11-13-2012, 03:09 PM
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I was thinking the same thing. Orange color could mean RUST.
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Old 11-13-2012, 04:35 PM
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The additive is dark blue. Nothing in the rear axle should be light colored, milky or orange
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rear differential, rear end

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