a Body 4speed

The flange-style output was dropped for the 1966 models, and the slip-yoke tailshaft was introduced. The long tailshaft versions utilized the larger 30-spline output shaft (same as the 727 Torqueflite) and the short tailshaft version the 26-spline output shaft (same as the 904 Torqueflite). The production of the 1967 383 big block-powered Darts and Barracudas mandated the addition of the 30-spline output shaft in the A-body transmission, which was expanded to include all A-body transmissions in 1968.