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buildup on rear diff plug

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Old Apr 21, 2021 | 03:39 PM
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buildup on rear diff plug

so i bought this truck at about 150K miles, 2011 5.0 4x4. had to change the backing plates for the parking brake. so i have the diff cover off. the oil looked ok, there was a lot of buildup on the plug, i assume it is normal? i did not take a picture, thought of that later. i did not see any wear marks or anything. but i have no experience with the rear diff. this was the first time actually pulling axels.
Thanks
Doug
 
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Old Apr 21, 2021 | 05:19 PM
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the plug is magnetic... its goal is to pull fine "wear in" powder out of the oil and hold it until you pull the plug to clean... normal.
 
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Old Apr 25, 2021 | 07:07 PM
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thank you.
 
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Old Apr 26, 2021 | 11:59 AM
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Just to add to what steve said, very fine, paste like buildup is normal, metal flakes that look like glitter is not.
 
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