WARNING: This page is about a different car, the 2004 Ford Pickup and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Lubricant Fill Level Checks Specification Chart
Courtesy of FORD MOTOR CO.
a
First fill the axle with 0.2365 liters (0.5 pints) of Additive Friction Modifier C8AZ-19B546-A or equivalent meeting Ford specification EST-M2C118-A.