F 250 4WD Pickup V8-5.4L SOHC VIN L (1999)
Fluid - Differential: Fluid Type Specifications
Front Axle ..................................................................................................................................................... Motorcraft SAE 75W90 Front Axle Lubricant
Rear Axle
F-250/350 (10.50) ......................................................................................................................... Motorcraft SAE 75W140 Synthetic Rear Axle Lubricant
F-350/450 (Dana 80) ...................................................................................................................... Motorcraft SAE 75W90 Synthetic Rear Axle Lubricant
F-550 (Dana 135) ............................................................................................................................ Motorcraft SAE 80W90 Premium Rear Axle Lubricant