sonnax zip kit 4r44e 4r55e 5r44e 5r55e Transmission_A131L Piston Molded Coast Clutch

Piston Molded Coast Clutch

5R55N 5R55W 5R55S Use with Servo Bore Tool T-9213

Transmissions: E4OD 1990-1995

Friction Pack A750E A750F A751F TB-50LS

YUKON XL 2005-2011 4 SP R/4WD V8 4

sonnax zip kit 4r44e 4r55e 5r44e 5r55e Transmission_A131L Piston Molded Coast ClutchSonnax 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