{"product_id":"stellar-automotive-group-c3-a4ld-4r44e-5r55e-servo-piston-fits-ford-78-up-56528-up","title":"Stellar Automotive Group C3\/A4LD\/4R44E\/5R55E Servo Piston fits Ford 78-Up","description":"\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eStellar Automotive Group C3\/A4LD\/4R44E\/4R55E\/5R55E Intermediate \u0026amp; Overdrive Servo Piston (Molded, 2.100\" ID) – Compatible for Ford 1978-Up\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFix harsh 2-3 or 3-4 shifts, delayed band apply, and burnt intermediate\/overdrive bands with this upgraded molded servo piston from Stellar Automotive Group.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe factory cast piston with separate lip seal is notorious for cracking, hardening, and leaking — causing weak or no band apply in 2nd, 3rd, and overdrive gears. This direct-replacement molded piston features a permanently bonded rubber sealing lip (2.100\" ID) that stays soft and leak-free for decades, restoring instant, firm servo engagement every time. Perfect for high-mileage Rangers, Explorers, and Aerostars.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePerfect fit for popular models including:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eFord Ranger, Explorer, Aerostar, Bronco II\u003c\/li\u003e\n \t\u003cli\u003eMercury Mountaineer\u003c\/li\u003e\n \t\u003cli\u003eMazda B-Series\u003c\/li\u003e\n \t\u003cli\u003eAll C3, A4LD, 4R44E, 4R55E, 5R55E applications (1978-Current)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSymptoms of a bad servo piston:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eHarsh or delayed 2-3 or 3-4 upshift\u003c\/li\u003e\n \t\u003cli\u003eNo overdrive engagement\u003c\/li\u003e\n \t\u003cli\u003eBurnt intermediate or overdrive band on teardown\u003c\/li\u003e\n \t\u003cli\u003eServo bore leakage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eDon’t fight old servo seals any longer — upgrade to the modern molded design and make your shifts crisp and reliable again.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e All parts are distributed, not designed or manufactured, by Stellar Automotive Group.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAdd this must-have servo upgrade to your cart today and feel the difference on every upshift!\u003c\/p\u003e\n\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection\u003e\u003c\/section\u003e\u003csection\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52967134691509,"sku":"56528 UP","price":51.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/56528-UP-scaled.jpg?v=1786623510","url":"https:\/\/transpartsdirect.com\/products\/stellar-automotive-group-c3-a4ld-4r44e-5r55e-servo-piston-fits-ford-78-up-56528-up","provider":"Trans Parts Direct","version":"1.0","type":"link"}