Kit contains a ring and pinion set, positraction unit, and installation parts

1965-1972 Buick Electra (Rear); 1964-1972 Buick Skylark (Rear); 1964-1971 Oldsmobile 442 (Rear); 1964-1972 Oldsmobile Cutlass (Rear); 1964-1972 Pontiac GTO (Rear); 1964-1972 Pontiac Bonneville (Rear); 1964-1972 Pontiac Catalina (Rear); 1967-1972 Pontiac Firebird (Rear); 1964-1972 Pontiac Grand Prix (Rear); 1965-1972 Pontiac LeMans (Rear); 1964-1970 Pontiac Tempest (Rear)