New Old Stock PowerFlite Reaction Shaft 1956-1961 Plymouth Dodge DeSoto #1633731PowerFlite Transmission Reaction Shaft This is a New Old Stock Mopar PowerFlite 2 speed automatic transmission torque converter reaction shaft for the models listed below. 9 37 64 inches long, 27 splines. For 1956 models used with transmissions stamped 1636234 237 and 1638530 561. Original Mopar part in original packaging. Models Plymouth: All models (1956 1961) Dodge: All models (1956 1961) DeSoto: All models (1956 1960) Chrysler: All models (1956)