NOS 1961-64 Pontiac Star-chief Catalina Bonneville Super Hydramatic HT Trans. 315 W/2 & 4 BC Trans to Idler lever Linkage Rod GM 538883. 4.040 --Super Hydramatic HT Trans. 1961-64 Pontiac Catalina. THIS ROD IS 100% CORRECT FOR MANY 1961-64 PONTIAC P/8 MODLES.