{"product_id":"1992-2004-4l60e-4l65e-pump-boost-valve-kit-sonnax-77898e-k","title":"1992-2004 4L60E-4L65E Pump Boost Valve Kit | Sonnax 77898E-K","description":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch3 style=\"text-align: left;\" class=\"subhead\"\u003e4L60E 4L65E Transmission Performance\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ch1 class=\"light\" style=\"text-align: left;\"\u003e\n\u003cb\u003eBoost Valve Kit\u003c\/b\u003e\u003cbr\u003e\u003csmall class=\"omega\"\u003ePart No. \u003cb id=\"analytics_pn\" data-part-name=\"77898E-K\"\u003e77898E-K\u003c\/b\u003e\u003c\/small\u003e\n\u003c\/h1\u003e\n\u003ch3 class=\"light\" style=\"text-align: left;\"\u003eEarly style, .490\" dia., increased ratio, O-ring style\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003eGM 4L60-E and 4L65-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The duty cycle of the EPC solenoid causes the boost sleeve to wear quickly. Oil entering the torque signal orifice leaks past the boost valve and exhausts at the Reverse orifice, resulting in poor line rise. Reverse oil can exhaust both to the sump and back through the torque signal orifice. The outside diameter of the boost sleeve also allows some leakage through the pump body, which decreases pressure rise.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eSonnax boost valve kit 77898E-K is an increased ratio assembly that will restore hydraulic integrity and prevent leakage in units with \u003cstrong\u003eearly\u003c\/strong\u003e-style pumps. Drop-in Zip Valve™ parts install quickly and easily. See chart for usage details and other boost valve options.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\" class=\"part-accordion cb spaced-vertical\"\u003e\n\u003cdiv id=\"notes\"\u003e\n\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003clabel for=\"notes-panel\"\u003eNote\u003c\/label\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cp\u003e\u003cstrong\u003eThis Kit Replaces early-style boost valve\u003c\/strong\u003e with \"long\" 1.907\" sleeve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"components\"\u003e\n\u003cstrong\u003e\u003clabel for=\"components-panel\"\u003eContents\u003c\/label\u003e\u003c\/strong\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eSleeve\u003c\/li\u003e\n\u003cli\u003eO-Rings (2)\u003c\/li\u003e\n\u003cli\u003eValve \u003ci\u003e.490\", No Groove\u003c\/i\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sonnax","offers":[{"title":"Default Title","offer_id":48239251816670,"sku":"S74507TEK","price":29.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/5464\/5470\/files\/S74507TEK_1.jpg?v=1778690076","url":"https:\/\/transmissioncenter.net\/products\/1992-2004-4l60e-4l65e-pump-boost-valve-kit-sonnax-77898e-k","provider":"Transmission Center","version":"1.0","type":"link"}