Sonnax Zip Kit 4R44E 4R55E 5R44E 5R55E
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Sonnax Zip Kit 4R44E 4R55E 5R44E 5R55E

$127.68
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Sonnax 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 resolves end plug leakage and poor checkball sealing issues, all without requiring special tools. Effortless Installation: Drop-in Zip Valve™ parts install easily with no reaming or special tools required. Targeted Repairs: Uniquely designed components address root causes of valve body pressure issues. Comprehensive Guidance: Includes a quick guide for fast installation and a technical booklet with rebuild tips and repair options for higher mileage units. Contents: Forward Modulator Valve, PTFE Seal, End Plug, Spring, & Large O-R

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