Mustang GT V8-4.6L SOHC VIN X (1998)
Fluid - Differential: Fluid Type Specifications
7.5 Inch ......................................................................................................................... Premium Rear Axle Lubricant XY-80W90-QL (WSP-M2CI 97-A)
8.8 Inch ......................................................................................................................... Premium Rear Axle Lubricant XY-80W90-QL (WSP-M2CI 97-A)
NOTE: All conventional axles use Motorcraft Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C1
97-A.
Traction-Lok axles .................................................. Ford Friction Modifier C8AZ-19B546-A or equivalent meeting Ford specification EST-M2C118-A.