This is a reproduction rear transmission seal for all Dodge trucks with a 3 speed transmission built between 1933 and 1953. This seal is also correct for Plymouth cars built from 1933 to 1939. This seal fits 6 cylinder Dodge, Desoto and Chrysler cars built from 1935 to 1939. This is also the correct transmission seal for 8 cylinder Chryslers built from 1937 to 1939. The Chrysler part number of this seal is 600420.