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the OE valve design provides poor sealing between the line pressure and converter feed circuits
Friction Pack A750E A750F A751F TB-50LS
Piston Molded Coast Clutch
Spring seat and spring
Transmissions: E4OD 1990-1995
sonnax zip kit 4r44e 4r55e 5r44e 5r55e Transmission_A131L the OE valve design providesSonnax Zip Kit for 4R44E, 4R55E, 5R44E, 5R55E The Sonnax Zip Kit 4R44E 5R55E ZIP addresses the root causes of valve body complaints in Ford 4R44E, 4R55E, 5R44E, and 5R55E transmissions. This kit seals critical circuit pressure losses in the main line, EPC, solenoid feed, and converter circuits. Additionally, it includes modifications to enhance shift firmness, improve intermediate servo and direct clutch pressure, and optimize TCC apply. The kit also
