Lubegard 19610 Dr. Tranny Instant Shudder Fixx, 2 Oz. (3) The original transmission shudder fix. A concentrated friction modifier formulated specifically for instantly eliminating torque converter lock-up shudder. Provides four times less wear than regular ATF. For use in any automatic transmission fluid (not for use in Ford Type F or CVT applications) Voted top product by transmission professionals.