Oil overfilled? Do your first rear diff fluid change at 25,000 milies (not 150,000 Which fluid to use?
Recommend Motorcraft SAE
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Oil overfilled? | F150 Ecoboost Forum

Do your first Rear Diff fluid change at 25,000 milies (not 150,000

Recommend Motorcraft SAE

Which fluid to use? - Ford Truck Enthusiasts Forums