Stops leaks/hard shifting. Controls overheating. Renews worn fluid. Stops slip. Cleans and lubricates sticking valves for proper shifting. Polymeric film renews worn bands to stop slipping. Completely stops most seal leaks. Hi-performance. A must for towing vehicles, motor homes, and all other hard working transmissions. Compatible with all transmissions and transmission fluids with the exception of CVT transmissions and transmission fluids. LucasOil.com. Lucas Transmission Fix will be ineffective if the transmission has broken internal parts or the bands/clutch packs are completely burned out. Results are usually immediate. Excellent also to control leaks, wear and hard shifting in light duty manual transmissions. Install full bottle; top-off with SAE 10W-30, SAE 15W-40 or automatic transmission fluid. Catch all your Lucas Motorsports Programming on MAV TV. Will not void new car warranties! Made in USA.