The Bar’s Leaks Automatic Transmission Repair, No. 1400, is designed to help users restore transmission performance and avoid transmission repairs. It reduces rough shifting and friction while eliminating slip, controlling temperature and repairing shudder, chatter and whining. One 16 oz. bottle starts working as soon as the vehicle is driven, with results seen in about 100 miles or two days of driving. It is formulated to work in all types of transmission fluid. Use in regular (not CVT) automatic transmissions.