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Rear diff: Wtf is causing this

Old May 16, 2020 | 10:36 PM
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Rear diff: Wtf is causing this

Finally got around to changing

my front and rear diff fluid and transfer case fluid. I bought it at 118k and everything was freshly changed now I have 245k and saw this on the rear diff. I have been told it was from a loose pinion bolt. Wanted to get y’all’s opinions. Thanks.
 
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Old May 17, 2020 | 06:15 AM
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I have seen that when the pinion bearings go.
 
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Old May 17, 2020 | 01:39 PM
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As IMSAP said! The bearings have worn and allowed the pinon to push back into the carrier.
 
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Old May 17, 2020 | 10:20 PM
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Well I did some further inspections and found the pinion nut was loose.
 
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Old May 19, 2020 | 06:55 AM
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Tighten her back up and you’re ready to go.

https://www.ford-trucks.com/forums/1...l#post10449902
 
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Old May 19, 2020 | 10:15 AM
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Originally Posted by wpnaes
Tighten her back up and you’re ready to go.

https://www.ford-trucks.com/forums/1...l#post10449902

yea I pulled the nut put some lock tight on it and reinstalled it
 
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Old May 26, 2020 | 09:59 PM
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besides need to do a fluid change, did you have any noise that didn't seem right when driving? at any speed? just curious
 
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Old May 26, 2020 | 10:10 PM
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Originally Posted by MTDewX
besides need to do a fluid change, did you have any noise that didn't seem right when driving? at any speed? just curious

no I didn’t hear anything unusual but I also have loud tires.
 
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