{"product_id":"oversized-pressure-regulator-valve","title":"Oversized Pressure Regulator Valve","description":"\n\u003cdiv class=\"spaced-vertical\"\u003e\n\u003cp\u003eA worn OE pressure regulator valve can be detected in two ways. The first is a dynamometer test that reveals low line pressure during boost conditions (look for 50-100 psi less than specified in Reverse). The second is vehicle symptoms such as clutch slippage, reverse chatter and 3-4 clutch failure. Any of the above problems indicate bore wear that should be addressed.\u003c\/p\u003e\n\n\u003cp\u003eTo address pressure regulator leakage in GM 4L60-E, 4L65-E and 4L70-E pump bodies, Sonnax offers oversized pressure regulator valve 77917-07. The Sonnax valve permits pump covers to be restored to OE specifications by correcting for wear and leakage at the pressure regulator valve.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eRefurbish the pump cover by reaming the bore and installing an oversized pressure regulator valve\u003c\/li\u003e\n\u003cli\u003eThe pressure regulator valve helps restore control over the pressure regulating circuit by eliminating leakage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"part-accordion cb spaced-vertical\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003clabel for=\"notes-panel\"\u003eNote:\u003c\/label\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cp\u003eBoost valves should be checked for leakage at the same time the pressure regulator valve is being replaced. When oversizing the pressure regulator valve, it is recommended to move up one boost ratio.\u003c\/p\u003e\n\n\u003cstrong\u003eRequired Parts:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-Speed Steel Reamer Tool Kit - Part No. \u003ca href=\"..\/i-30503151-high-speed-steel-reamer-tool-kit-for-77917-06-77917-07.html\"\u003e77917-TL\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eCarbide Reamer Tool Kit - Part No. \u003ca href=\"..\/i-30503147-carbide-reamer-tool-kit-for-77917-06-77917-07.html\"\u003e77917-TLC\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"break-out-grey\"\u003e\n\u003cdiv class=\"wrap scc\"\u003e\n\u003cdiv class=\"col-4\"\u003e\n\u003cp\u003e\u003cstrong\u003eSymptoms:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eErratic line pressure\u003c\/li\u003e\n\u003cli\u003eLow line rise\u003c\/li\u003e\n\u003cli\u003e3-4 Clutch failure\u003c\/li\u003e\n\u003cli\u003eExcess pump noise\u003c\/li\u003e\n\u003cli\u003eReverse chatter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"col-4\"\u003e\n\u003cp\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e\u003c\/p\u003e\nPressure regulator valve bore wear allows leakage and contributes to erratic pump slide movement.\u003c\/div\u003e\n\u003cdiv class=\"col-4\"\u003e \u003c\/div\u003e\n\u003cdiv class=\"col-4 last\"\u003e\n\u003cp\u003e\u003cstrong\u003eCorrection:\u003c\/strong\u003e\u003c\/p\u003e\nRepair the valve bore and restore pressure control to the system with this oversized pressure regulator valve and reamer kit.\u003c\/div\u003e\n\u003cdiv class=\"col-4 last\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"break-out-accent break-out-accent-link\"\u003e\n\u003cdiv class=\"wrap\"\u003e\n\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCasting hardness often causes adverse issues with reamer performance in the 4L60\/E pump. For consistent bore finish quality and extended reamer life, recommend using Sonnax carbide tool kit \u003ca href=\"..\/i-30503147-carbide-reamer-tool-kit-for-77917-06-77917-07.html\"\u003e77917-TLC\u003c\/a\u003e. This tool kit can also be used with Sonnax oversized pressure regulator valve \u003ca href=\"..\/i-30503160-oversized-pressure-regulator-valve.html\"\u003e77917-06\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e \u003c!-- suncoast-documents:start --\u003e\u003cdiv class=\"suncoast-product-documents\"\u003e\n\u003ch3 class=\"h6\"\u003eDocuments\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/184171.pdf?v=1793635203\" target=\"_blank\" rel=\"noopener\"\u003eInstructions\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\u003c!-- suncoast-documents:end --\u003e","brand":"Sonnax","offers":[{"title":"Default Title","offer_id":49129565913307,"sku":"77917-07","price":37.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/F198655805.jpg?v=1786547023","url":"https:\/\/suncoastperformance.com\/products\/oversized-pressure-regulator-valve","provider":"SunCoast Diesel","version":"1.0","type":"link"}