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The 2009 Ford F-150 is equipped with high-quality synthetic axle lubricant in its rear differentials. This specialized fluid, labeled as SAE 75w-40, can be purchased at various auto shops, parts stores, and online retailers. The price for a container of this fluid ranges from approximately $3.44 to $10.98. Alternatively, if you opt to have a professional mechanic or service technician replace the differential fluids for you, expect to pay between $90 and $140 for the labor.
The 2009 Ford F150 uses 75w140 rear differential fluid as its lubricant.