This is a Revitalizant for manual transmission, gear box, rear axle reducer or any kind of reducers. Added to the oil, this gel will restore the geometry of the gears and the worn out metal structure of the gear and bearing surfaces. It will significantly reduce the friction coefficient and construct a hard protective cermet (Ceramic+Metal) layer on all surfaces where friction is present in the transmission. All of that translates into huge improvements in fuel saving and efficiency of the whole gear box. Try it and see for yourself.