{"product_id":"stellar-automotive-group-45rfe-68rfe-underdrive-balance-piston","title":"45RFE\/68RFE Underdrive Balance Piston","description":"\u003cp dir=\"auto\"\u003e\u003cstrong\u003e45RFE\/68RFE Underdrive Balance Piston – Compatible for Dodge, Jeep \u0026amp; Chrysler 1999-Up\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eStop harsh 1st gear engagement, flare, and burnt underdrive clutches with this precision bonded balance piston from Stellar Automotive Group.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis is the critical balance piston inside the underdrive clutch drum on all 45RFE, 545RFE, and 68RFE transmissions. The factory piston commonly cracks or loses its bond under heat and mileage, causing internal leakage that slams the underdrive pack on apply — leading to rapid friction failure and that classic “bang” when shifting into Drive. This direct-replacement molded piston with permanently bonded rubber seal restores perfect clutch timing, smooth takeoff, and reliable performance even under heavy towing.\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\u003eDodge Ram 1500, 2500, 3500, Dakota, Durango\u003c\/li\u003e\n \t\u003cli\u003eJeep Liberty, Grand Cherokee, Commander\u003c\/li\u003e\n \t\u003cli\u003eChrysler Aspen\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSymptoms of a failing underdrive balance piston:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eHard bang or delayed engagement into Drive\u003c\/li\u003e\n \t\u003cli\u003eUnderdrive clutch slip or flare on takeoff\u003c\/li\u003e\n \t\u003cli\u003eBurnt underdrive frictions on teardown\u003c\/li\u003e\n \t\u003cli\u003eHarsh 1-2 upshift\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eDon’t let a $50 piston destroy a $500 clutch pack — install the bonded underdrive balance piston and shift smooth from the start.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAdd this must-have 45RFE\/68RFE rebuild part to your cart today and drive with confidence!\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52425243394229,"sku":"44830 UP","price":102.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/44830-UP-scaled.jpg?v=1786618769","url":"https:\/\/transpartsdirect.com\/products\/stellar-automotive-group-45rfe-68rfe-underdrive-balance-piston","provider":"Trans Parts Direct","version":"1.0","type":"link"}