{"product_id":"reverse-boost-valve-kit-o-ring-style","title":"Reverse Boost Valve Kit - O-Ring Style","description":"\n\u003ch2 class=\"light\"\u003e\u003cstrong\u003eLarge Ratio, O-Ring Style\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cp\u003eVehicles with GM 200-4R and 4L60 transmissions often have problems with poor Reverse boost or upshifts in manual low. These are generally caused by a worn Reverse boost valve sleeve or wear at the pump body. Sonnax offers a larger ratio (.283\") Reverse boost valve kit K77898 to restore the hydraulic integrity of the assembly.\u003c\/p\u003e\n\n\u003cp\u003eDue to the differences in the thermal expansion rate of steel and aluminum when the transmission approaches operating temperature, the sleeve has been allowed excessive clearance and scrubs the bore.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eSleeve O-rings seal the Reverse boost circuit and prevent leakage from the pump body bore\u003c\/li\u003e\n\u003cli\u003eSleeve and valve are made from hardened steel for increased wear resistance\u003c\/li\u003e\n\u003cli\u003eSleeve lands have been lengthened to add better sealing and stabilizing capabilities to prevent bore wear\u003c\/li\u003e\n\u003cli\u003eReverse boost valve spool lands have been lengthened to aid in maintaining hydraulic integrity\u003c\/li\u003e\n\u003cli\u003eDrop-in Zip Valve™ parts install quickly and easily\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eValve\u003c\/li\u003e\n\u003cli\u003eSleeve\u003c\/li\u003e\n\u003cli\u003eO-Rings (2)\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\u003eLow Reverse boost\u003c\/li\u003e\n\u003cli\u003eDelayed Reverse\u003c\/li\u003e\n\u003cli\u003eLow line pressure\u003c\/li\u003e\n\u003cli\u003ePoor upshift in manual low\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\nWorn Reverse boost valve sleeve or wear at pump body.\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\nSonnax large ratio, drop-in Reverse boost valve kit is made from hardened steel and O-rings have been added to seal the Reverse boost circuit and prevent leakage.\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\/184274.pdf?v=1793635299\" 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":49129568567515,"sku":"K77898","price":49.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/F198656039.jpg?v=1786547126","url":"https:\/\/suncoastperformance.com\/products\/reverse-boost-valve-kit-o-ring-style","provider":"SunCoast Diesel","version":"1.0","type":"link"}