{"product_id":"pressure-regulator-valve-kit-sonnax-6l45-6l50-6l80-6l90","title":"Pressure Regulator Valve Kit Sonnax 6L45 6L50 6L80 6L90","description":"\u003ch3\u003eSonnax Pressure Regulator Valve Kit for 6L45, 6L50, 6L80, 6L90\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSonnax 104520-15K pressure regulator valve kit\u003c\/strong\u003e is designed to resolve common hydraulic issues in GM 6L45, 6L50, 6L80, and 6L90 transmissions. Excessive wear in the pressure regulator bore—particularly around the balance and outboard spools—can lead to fluid leaks, resulting in \u003cstrong\u003eerratic line pressure, harsh or soft shifts, clutch failure, and transmission overheating\u003c\/strong\u003e. This drop-in solution restores pressure stability and ensures proper flow to the converter and cooler circuits.\u003c\/p\u003e\n\u003cp\u003eThe upgraded valve features hardcoat anodized aluminum for durability, extended spool lengths to bypass worn areas, and annular grooves that center the valve to prevent future side-load wear. The kit also includes a \u003cstrong\u003enew outer spring\u003c\/strong\u003e that slightly increases line pressure by approximately 5 psi to improve performance across the operating range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Pump must be removed to install this kit. This is a direct replacement for the discontinued Sonnax kit 104520-14K. \u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePressure Regulator Valve\u003c\/li\u003e\n\u003cli\u003ePressure Regulator Spring\u003c\/li\u003e\n\u003cli\u003eCheckball\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHardcoat anodized aluminum construction resists premature wear\u003c\/li\u003e\n\u003cli\u003eExtended spool design operates in less-worn bore areas\u003c\/li\u003e\n\u003cli\u003eGrooved spools minimize side-load and bore damage\u003c\/li\u003e\n\u003cli\u003eReplacement spring improves pressure response (+5 psi)\u003c\/li\u003e\n\u003cli\u003eNo machining or drilling required\u003c\/li\u003e\n\u003cli\u003eEasy drop-in installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Symptoms:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eErratic, high, or low line pressure\u003c\/li\u003e\n\u003cli\u003eHarsh or soft shifts\u003c\/li\u003e\n\u003cli\u003eClutch slippage or failure\u003c\/li\u003e\n\u003cli\u003eInadequate or no cooler flow\u003c\/li\u003e\n\u003cli\u003eTransmission overheating\u003c\/li\u003e\n\u003cli\u003eTorque converter performance issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e\u003cbr\u003eContinuous oscillation of the OE regulator valve leads to wear in the valve bore, which disrupts hydraulic balance and reduces flow to critical areas.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCorrection:\u003c\/strong\u003e\u003cbr\u003eInstall the Sonnax pressure regulator valve kit to reestablish precise pressure control and restore full transmission function.\u003c\/p\u003e\n\u003ch4\u003eVehicle\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBMW\u003c\/strong\u003e\u003cbr\u003e1-SERIES 2006-2013 6 SP RWD L4 1.6L 2.0L L6 3.0L\u003cbr\u003eX1, Z4, X1, Z4 2009-2016 6 SP R\/4WD L4 2.0L L6 3.0L\u003cbr\u003e1-SERIES 2006-2013 6 SP RWD L4 1.6L 2.0L L6 3.0L\u003cbr\u003e5-SERIES 2006-2010 6 SP R\/4WD L6 2.5L 3.0L\u003cbr\u003e6-SERIES 2007-2013 6 SP RWD L6 3.0L\u003cbr\u003eZ4 ROADSTER 2009-2011 6 SP R\/4WD L6 3.0L\u003cbr\u003e\u003cstrong\u003eBUICK\u003c\/strong\u003e\u003cbr\u003ePARK AVENUE 2010-2013 6 SP R\/4WD L4 2.0L V6 2.8L 3.0L 3.6L\u003cbr\u003e\u003cstrong\u003eCADILLAC\u003c\/strong\u003e\u003cbr\u003eCTS COUPE, CTS SPORT WAGON, CTS COUPE, CTS COUPE 2010-2014 6 SP RWD V8 6.2L\u003cbr\u003eCTS 2007-2014 6 SP R\/4WD V8 6.0L\u003cbr\u003eESCALADE 2007-2016 6 SP R\/4WD V8 6.2L\u003cbr\u003eESCALADE ESV 2008-2016 6 SP R\/4WD V8 6.2L\u003cbr\u003eSTS 2005-2011 6 SP RWD V8 4.4L\u003cbr\u003eXLR\/XLR-V 2005-2009 6 SP RWD V8 4.4L 4.6L\u003cbr\u003eATS 2012-2016 6 SP R\/4WD L4 2.0L 2.5L V6 3.0L 3.6L\u003cbr\u003eCTS 2008-2014 6 SP RWD V6 2.8L 3.6L\u003cbr\u003eCTS 2013-2016 6 SP R\/4WD L4 2.0L\u003cbr\u003eCTS SPORT WAGON 2009-2014 6 SP R\/4WD V6 3.0L 3.6L\u003cbr\u003eSRX, XLR 2006-2009 6 SP R\/4WD V8 4.6L\u003cbr\u003eSTS 2006-2013 6 SP R\/4WD L4 2.0L V6 3.0L 3.6L V8 4.6L\u003cbr\u003eATS 2012-2016 6 SP R\/4WD L4 2.0L 2.5L V6 3.0L 3.6L\u003cbr\u003eCTS 2013-2016 6 SP R\/4WD L4 2.0L\u003cbr\u003eCTS SPORT WAGON 2009-2014 6 SP R\/4WD V6 3.0L 3.6L\u003cbr\u003eSTS 2006-2013 6 SP R\/4WD L4 2.0L V6 3.0L 3.6L V8 4.6L\u003cbr\u003e\u003cstrong\u003eCHEVROLET\u003c\/strong\u003e\u003cbr\u003eCAMARO 2011-2015 6 SP RWD V8 6.2L\u003cbr\u003eEXPRESS 2009-2016 6 SP RWD V8 6.0L 6.6L\u003cbr\u003eSILVERADO 2013-2016 6 SP R\/4WD V8 6.2L\u003cbr\u003eSILVERADO HD, CORVETTE 2007-2016 6 SP R\/4WD V8 6.0L\u003cbr\u003eSUBURBAN 2500 2006-2013 6 SP R\/4WD V8 6.0L\u003cbr\u003eVAN FULL SIZE 3500 2010-2011 6 SP R\/4WD V8 4.8L 6.0L 6.6L DIESEL\u003cbr\u003eAVALANCHE 2008-2013 6 SP R\/4WD V8 5.3L 6.0L\u003cbr\u003eC-1500 2013-2015 6 SP 4WD V8 5.3L\u003cbr\u003eCAMARO 2009-2015 6 SP RWD V8 6.2L\u003cbr\u003eEXPRESS 2009-2016 6 SP R\/4WD V6 4.3L V8 4.8L 5.3L\u003cbr\u003eSILVERADO, SUBURBAN, TAHOE 2008-2016 6 SP R\/4WD V6 4.3L V8 5.3L\u003cbr\u003eVAN FULL SIZE 2500 2009-2011 6 SP RWD V8 4.8L 5.3L\u003cbr\u003eCAMARO 2009-2015 6 SP RWD V6 3.6L\u003cbr\u003eCANYON, T-SERIES 2014-2016 6 SP R\/4WD L4 2.5L 2.8L V6 3.6L\u003cbr\u003eCOLORADO 2011-2016 6 SP R\/4WD L4 2.5L 2.8L V6 3.6L\u003cbr\u003eS-10, TRAILBLAZER 2012-2016 6 SP R\/4WD L4 2.8L\u003cbr\u003e\u003cstrong\u003eGMC\u003c\/strong\u003e\u003cbr\u003eSAVANA, SIERRA 2009-2016 6 SP RWD V8 6.0L 6.6L\u003cbr\u003eSIERRA 2013-2016 6 SP R\/4WD V8 6.2L\u003cbr\u003eSIERRA HD 2007-2016 6 SP R\/4WD V8 6.0L\u003cbr\u003eSAVANA 2009-2016 6 SP R\/4WD V8 4.8L 5.3L\u003cbr\u003eSIERRA DENALI 2008 6 SP R\/4WD V8 6.2L\u003cbr\u003eYUKON 2006-2016 6 SP R\/4WD V8 5.3L 6.0L 6.2L\u003cbr\u003eYUKON XL 2008-2016 6 SP R\/4WD V8 5.3L 6.2L\u003cbr\u003e\u003cstrong\u003eHOLDEN\u003c\/strong\u003e\u003cbr\u003eCAPRICE 2012-2016 6 SP RWD V6 3.6L V8 6.0L\u003cbr\u003eCOMMODORE 2006-2016 6 SP RWD V6 3.0L 3.6L V8 6.0L 6.2L\u003cbr\u003eSS PERFORMANCE 2013-2016 6 SP RWD V8 6.0L\u003cbr\u003eCAPRICE, COMMODORE, COMMODORE 2012-2013 6 SP RWD V6 3.6L\u003cbr\u003eSS PERFORMANCE 2013-2016 6 SP RWD V6 3.6L\u003cbr\u003e\u003cstrong\u003ePONTIAC\u003c\/strong\u003e\u003cbr\u003eG8 2007-2010 6 SP RWD V8 6.0L 6.2L\u003cbr\u003eG8 2008-2010 6 SP RWD V6 3.6L\u003cbr\u003e\u003cstrong\u003eTATA\u003c\/strong\u003e\u003cbr\u003eARIA 2015-2016 6 SP R\/4WD L4 2.2L\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlternate Words:\u003c\/strong\u003e transmission and specialty driveline components, 104520-14K\u003c\/p\u003e","brand":"SONNAX","offers":[{"title":"Default Title","offer_id":42274471673915,"sku":"104520-15K","price":36.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/1285\/8683\/files\/104520-15K-01.png?v=1751059536","url":"https:\/\/es.suntransmissions.com\/products\/pressure-regulator-valve-kit-sonnax-6l45-6l50-6l80-6l90","provider":"Sun Transmissions","version":"1.0","type":"link"}