{"product_id":"signal-accumulator-piston-kit-sonnax-8l45-8l90","title":"Signal Accumulator Piston Kit Sonnax 8L45 8L90","description":"\u003ch3\u003eSonnax Signal Accumulator Piston Kit – Fits GM 8L45 \u0026amp; 8L90\u003c\/h3\u003e\n\u003cp\u003eIn GM 8L45 and 8L90 transmissions, excessive wear in the signal accumulator piston bores of the solenoid body casting can lead to shift issues, low line pressure, torque converter apply problems, and burnt clutches. These problems occur when VFS signal pressure leaks through worn bores, disrupting proper control of pressure circuits and clutch apply timing.\u003c\/p\u003e\n\u003cp\u003eThe Sonnax signal accumulator piston kit 154740-06K is a direct replacement solution that restores control pressure without the need for reaming. This drop-in kit seals worn bores, revives VFS pressure accuracy, and improves transmission performance with long-lasting, wear-resistant components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision-machined pistons with hardcoat anodizing for increased durability\u003c\/li\u003e\n\u003cli\u003eAnnular grooves reduce friction and slow future wear\u003c\/li\u003e\n\u003cli\u003eWear-resistant sleeves restore bore integrity\u003c\/li\u003e\n\u003cli\u003eO-ringed end plugs provide effective sealing in damaged or worn bores\u003c\/li\u003e\n\u003cli\u003eMatching springs included to replicate factory dampening behavior\u003c\/li\u003e\n\u003cli\u003eAll components are drop-in ready—no special tools or machining required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4 Sleeves\u003c\/li\u003e\n\u003cli\u003e4 Pistons\u003c\/li\u003e\n\u003cli\u003e4 Springs\u003c\/li\u003e\n\u003cli\u003e4 End Plugs\u003c\/li\u003e\n\u003cli\u003e6 O-Rings (2 extra)\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 or soft shifting\u003c\/li\u003e\n\u003cli\u003eInsufficient line pressure\u003c\/li\u003e\n\u003cli\u003eConverter clutch not applying\u003c\/li\u003e\n\u003cli\u003eHydraulic-related DTCs\u003c\/li\u003e\n\u003cli\u003eBurnt or slipping clutches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Excessive wear in signal accumulator bores causes loss of VFS pressure, which compromises the regulation of line pressure, shift quality, and converter clutch control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCorrection:\u003c\/strong\u003e Install the Sonnax signal accumulator piston kit to restore VFS pressure circuit sealing, improve shift consistency, and extend transmission life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmissions: \u003c\/strong\u003e 8L90 2014-UP, 8L45 2016-UP\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eVehicle\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eCADILLAC\u003c\/strong\u003e\u003cbr\u003eESCALADE, ESCALADE ESV, ATS, CT6, CTS 2015-2016 8 SP RWD V6 3.6L\u003cbr\u003e\u003cstrong\u003eCHEVROLET\u003c\/strong\u003e\u003cbr\u003eCORVETTE, SILVERADO 2014-2016 8 SP RWD V8 6.2L\u003cbr\u003eCAMARO 2015-2016 8 SP RWD L4 2.0L V6 3.6L V8 6.2L\u003cbr\u003eCANYON, COLORADO, SILVERADO 2016 8 SP R\/4WD L4 2.5L\u003cbr\u003e\u003cstrong\u003eGMC\u003c\/strong\u003e\u003cbr\u003eYUKON XL 2014-2016 8 SP R\/4WD V8 5.3L 6.2L\u003cbr\u003eSIERRA 2014-2016 8 SP R\/4WD V8 5.3L 6.2L\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlternate Words:\u003c\/strong\u003e transmission and specialty driveline components\u003c\/p\u003e","brand":"SONNAX","offers":[{"title":"Default Title","offer_id":43072211484731,"sku":"154740-06K","price":71.03,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/1285\/8683\/files\/W1_5dadcb3a-31d2-4de9-bc17-a3d676f08777.jpg?v=1765462720","url":"https:\/\/es-ve.suntransmissions.com\/products\/signal-accumulator-piston-kit-sonnax-8l45-8l90","provider":"Sun Transmissions","version":"1.0","type":"link"}