STP Gearbox Oil Treatment 150ML Product Overview Reduces friction and noise Product Details STP® Oil Treatment for Gearboxes is designed to lubricate hard to reach areas including gearboxes, transmissions, differentials, back axles and steering boxes in one easy application to provide a smoother gear change. Directions Use STP® Oil Treatment for Gearboxes at or between transmission oil changes. Is it safe to use in my vehicle STP® Oil Treatment for Gearboxes is not recommended for use in automatic gearboxes (transmissions), overdrives or slip differential axles. Take Note! Must not be used in vehicles with a wet clutch/friction drives; the lubricating properties of STP® Oil Treatment for Gearboxes would reduce the friction and cause the clutch to slip.
