{"product_id":"oversized-4-3-sequence-valve-kit-oe-valve-bore-only","title":"Oversized 4-3 Sequence Valve Kit - OE Valve\/Bore Only","description":"\n\u003ch2 class=\"light\"\u003e\u003cstrong\u003eUse with OE valve\/bore only, addresses wear at inboard two spools \u0026amp; other locations.\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cdiv class=\"spaced-vertical\"\u003e\n\u003cdiv class=\"spaced-vertical\"\u003e\n\u003cp\u003eGM 4L60-E, 4L65-E and 4L70-E transmissions often have trouble shifting into or holding 4th Gear due to excess wear in the sequence valve bore. This wear allows vital 4th servo feed and 3-4 accumulator oil to exhaust, resulting in deficient 4th servo apply pressure. Consequences are slipping or no 4th Gear operation followed closely by a burnt band.\u003c\/p\u003e\n\n\u003cp\u003eExisting Sonnax kit \u003ca href=\"..\/i-30503117-oversized-4-3-sequence-valve-kit.html\"\u003e77964-04K\u003c\/a\u003e does not address wear on the inboard two spools that is increasingly more common in these aging valve bodies. Wear at these spools can allow valuable 4th servo feed leakage, resulting in no 4th and 2-4 band wear, but can also allow leakage of 2nd clutch oil needed to apply the 2-4 band in 2nd Gear, resulting in poor 2nd Gear shifts. Leaking at the OE end plug also allows oil loss that can leave 4th Gear inoperable.\u003c\/p\u003e\n\n\u003cp\u003eRe-establish hydraulic control and restore normal 4th Gear operation by reconditioning the entire bore and installing Sonnax oversized 4-3 sequence valve kit 77964-14K.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e3-4 Relay and 4-3 sequence valves are completely oversized\u003c\/li\u003e\n\u003cli\u003eO-Ringed end plug helps prevent 4th Gear oil loss\u003c\/li\u003e\n\u003cli\u003eHardcoat anodized aluminum valves combat premature wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\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\u003eKit can only be used to replace OE steel valves in bore that has not been previously reamed for \u003ca href=\"..\/i-30503117-oversized-4-3-sequence-valve-kit.html\"\u003e77964-04K\u003c\/a\u003e. See chart in instructions for details.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003clabel for=\"components-panel\"\u003eContents:\u003c\/label\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003e3-4 Relay Valve\u003c\/li\u003e\n\u003cli\u003e4-3 Sequence Valve\u003c\/li\u003e\n\u003cli\u003eSpring\u003c\/li\u003e\n\u003cli\u003eEnd Plug\u003c\/li\u003e\n\u003cli\u003eO-Rings (2) \u003cem\u003e1 Extra\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eRequired Parts:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eReamer Tool Kit - Part No. \u003ca href=\"..\/i-30503146-reamer-tool-kit-for-77964-14k.html\"\u003eF-77964-TL14\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"col-4\"\u003e\n\u003cp\u003e\u003cstrong\u003eSymptoms:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2-4 Band burned\u003c\/li\u003e\n\u003cli\u003eLow 4th Gear pressure\u003c\/li\u003e\n\u003cli\u003eNo 4th\u003c\/li\u003e\n\u003cli\u003e2nd Quality poor\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\nContinuous oscillation in relay valve and sequence valve bore causes wear that prevents proper hydraulic control.\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\nRecover hydraulic control and renew 2nd and 4th Gear operation by reconditioning the entire bore and installing Sonnax oversized 4-3 sequence valve kit.\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\/184214.pdf?v=1793635234\" 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":49129566961883,"sku":"77964-14K","price":111.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/F198655913.jpg?v=1786547067","url":"https:\/\/suncoastperformance.com\/products\/oversized-4-3-sequence-valve-kit-oe-valve-bore-only","provider":"SunCoast Diesel","version":"1.0","type":"link"}