Ford C4 1970-1972 (except late 1972's with push in modulator and early 1970 Falcon with PED-C3 and PEE-V2) code. Includes items to restore proper function to Valve body with much improved drivability and durability. Features: Raises overall line pressure. 75% quicker 2-3 shifts. More pressure for passing gear between 32-45 mph. Eliminates too easy and too often passing gear. Quicker action throughout all shifting. Crisp shift performance and more durability. A wonderful addition to your OEM Classic vehicle. You will love how it shifts. Installation recommendation: Experienced technician Transmission removal necessary: No