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For the 2001 Ford F-150, the rear differential requires 75W-140 gear oil, which is thicker and better suited for the intense heat and close quarters of this area compared to what's typically used in engines or transmissions. Opting for a thinner oil would result in quicker breakdown against the gears, making a thicker fluid necessary. It's advised to change the differential fluid every 30,000 miles to protect and maintain the rear end gears, as they undergo significant stress in transferring power from the engine to the tires. Keeping these gears properly lubricated is crucial for their longevity and functionality.
The appropriate fluid for the rear differential of a 2001 Ford F-150 is 75W-140 GL-5.
Does this apply to the front differential as well?
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