Differential oil is essential to lubricating the driveshaft and wheel axles in a vehicle. The 2004 Ford F-150 as a heavy truck uses a gear lubricant with a viscosity of 75W-90. An 8.8/9.75 inch rear differential is equipped with 5.5 pints and the front holds 1.7 quarts of fluid. Signs the differential needs attention include metal shavings in the oil, road vibrations, grinding when turning the wheel, whining and humming noises. Ford recommends changing the gear oil every 150,000 miles but if You notice any of the above conditions, visit a brake center. Many firSTSchedule service at 100,000 miles. Costs average $140-$150 in parts and professional labor.
rick d
October 28, 2022
Manual says Motorcraft SAE 75W90 fuel efficient high performance synthetic rear axle lubricant for front and rear diffs.- 5.5 pints for the 8.8/9.75" axel and 6.9 pints for the 10.25 axle.
John M
July 16, 2020
The 2004 ford f150 rear differential fluid type is dex/merc atf conventional automatic transmission fluid
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