O’Reilly GL-5 80W-90 Gear Oil is a multi-purpose extreme pressure gear lubricant recommended for make-up or refill of manual shift transmissions, conventional differentials, rear axles, and steering gear boxes as found in passenger cars, trucks, and farm tractors, where API GL-5 or MT-1 lubricants are specified. Can be used for the make-up of Limited Slip/Positive Traction rear axles. Suitable for use where the following API service designations apply: GL-2, GL-3, GL-4 and GL-5. Always follow the manufacturer’s recommendations for specific fluid requirements.