AODE, 4R70W and 4R75W 1991-2013 Ford/Lincoln Mercury Upgraded in July 2013 to include new Steel Pressure Regulator valve and accumulator springs. Includes new Solenoid Regulator valve, EPC Relief system, 3rd Accumulator Plate saver, and special High Tech Forward Clutch sealing rings. Addresses: 4th band failure; 2nd roller failure; long soft 1-2 and 2-3 shifts; reduces accidental high-pressure parts breakage. Saves cracked and worn separator plate. Features: Progressively Firmer performance type shifts with class, great for Hot Rods, Race vehicles or hard working vehicles. Gear Command Back shift to any gear at your command. Holds the gear you select to any rpm. Installation recommendation: Experienced technician Transmission removal necessary: No