What is the rear end fluid capacity on a 2003 mountaineer?

The rear end fluid capacity for a 2003 Mercury Mountaineer, which typically uses a Ford 8.8-inch rear differential, is approximately 3.5 to 4 quarts when changing the fluid. It's important to check the owner's manual or consult with a mechanic for specific recommendations, as capacities can vary slightly based on the differential type and configuration. Always ensure to use the correct type of differential fluid as specified by the manufacturer.