If your transmission is leaking at the speedometer cable adapter, its likely one or all of these 3 seals are defective. Package consists of (1) molded speedometer pinion gear seal, (1) speedometer cable O-ring and (1) speedometer cable adapter O-ring. For all 1960-65 Plymouth Barracuda - Valiant; all 1961-62 Dodge Lancer and all 1963-65 Dart