WHAT DOES? Creates a resistant layer to reduce friction between gears (helical, flat) without leaving any type of solid residue. Does not alter the color, density and volume of the oil WHEN TO USE IT? - FOR: Optimize the operation between internal elements of the manual, automatic gearbox, reducers, group and differentials Reduce noise and vibrations caused by wear Make gear selection easier, especially on worn synchronizers Restore the correct operation of the valves and other components in automatic gearboxes Fix minor oil leaks MODE OF USE: With the engine off, remove the gearbox register filler cap. Apply product content put the plug In case of application in groups and differentials, follow the same procedure