Stops transmission slip. Polymetric film renews worn bands to stop slipping. Cleans and lubricates sticking valves for proper shifting. Extends fluid life up to 3 times longer. Controls heat and foaming. A must for motor homes, towing vehicles, and all other hard working transmissions. Completely stops most seal leaks. Compatible with all transmissions and transmission fluids. Will not void new car warranties. This product can not fix mechanical failures and torn seals.