2003 Ford F250 Owner Guide 5th Printing - Page 256

Maintenance and Specifications 1 Your vehicle's rear axle(s) may be filled with a synthetic lubricant that may require a lubricant change. Refer to the scheduled maintenance guide. Axle lubricant quantities should not need to be checked unless a leak is suspected, service is required or the axle assembly has been submerged in water. The axle lubricant should be changed any time the rear axle has been submerged in water. Add 236 ml (8 oz.) of Additive Friction Modifier XL-3or equivalent meeting Ford Specification EST-M2C118-A for complete refill of Traction-Lok axles. 3 4 2 Add the coolant type originally equipped in your vehicle. Ensure the correct automatic transmission fluid is used. Transmission fluid requirements are indicated on the end of the dipstick. Check the container to verify the fluid being added is of the correct type. Refer to your scheduled maintenance guide to determine the correct service interval. Some transmission fluids may be labeled as dual usage, such as MERCON௡ and MERCON௡ V. These dual usage fluids are not to be used in an automatic transmission that requires use of the MERCON௡ type fluid. However, these dual usage fluids may be used in transmissions that require the MERCON௡ V type fluid. MERCON௡, MERCON௡ V and MERCON௡ SP are not interchangeable. DO NOT mix MERCON௡, MERCON௡ V and MERCON௡ SP. Use of dual usage fluids in an automatic transmission application requiring MERCON௡ SP may cause transmission damage. Use of a transmission fluid other than the recommended fluid may cause transmission damage. 5 Service refill capacity is determined by filling the transmission to the bottom of the filler hole with the vehicle on a level surface. The 6-speed manual transmission is equipped with an in-tank cooler. Verify the fluid level after operating vehicle to assure correct fluid level. 6 Indicates only approximate dry-fill capacity. Some applications may vary based on cooler size and if equipped with an in-tank cooler. The amount of transmission fluid and fluid level should be set by the indication on the dipstick's normal operating range. 7 Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the requirements of Ford specification WSS-M2C153-H and the API Certification mark. 256 2003 F250/350/450/550 (f23) Owners Guide (post-2002-fmt) USA English (fus)