{"product_id":"4l60e-4l65e-4l70e-sonnax-fwd-1-2-3-4-pinless-forward-accumulator-piston-kit","title":"4L60E 4L65E 4L70E Sonnax FWD 1-2 3-4 Pinless Forward Accumulator Piston Kit","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis aftermarket replacement pinless forward accumulator piston kit is intended for 4L60E, 4L65E, and 4L70E transmission applications and references Sonnax FWD 1-2\/3-4 accumulator piston components. A forward accumulator piston operates within the transmission valve body to help manage fluid pressure during 1-2 and 3-4 shift events. The kit is supplied for servicing the corresponding accumulator piston location during transmission repair or rebuild work.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eForward accumulator piston kit designed for 1-2 and 3-4 shift accumulator function in 4L60E, 4L65E, and 4L70E transmissions\u003c\/li\u003e\n\u003cli\u003ePinless design references Sonnax forward accumulator piston configuration\u003c\/li\u003e\n\u003cli\u003eHelps support normal hydraulic pressure control during forward gear upshifts when installed in the correct accumulator bore\u003c\/li\u003e\n\u003cli\u003eIntended for transmission repair or rebuild use where the forward accumulator piston is being replaced\u003c\/li\u003e\n\u003cli\u003eCross-references Sonnax forward accumulator piston kit components for comparison with the existing part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003efor 4L60E transmission applications\u003c\/li\u003e\n\u003cli\u003efor 4L65E transmission applications\u003c\/li\u003e\n\u003cli\u003efor 4L70E transmission applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn, damaged, or malfunctioning forward accumulator piston during transmission service\u003c\/li\u003e\n\u003cli\u003eTransmission rebuild or repair involving the 1-2 and 3-4 accumulator circuit\u003c\/li\u003e\n\u003cli\u003eRestoring normal accumulator function after the original piston has failed\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Forward Accumulator Piston Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e Sonnax FWD 1-2\/3-4 Pinless Forward Accumulator Piston Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral Application:\u003c\/strong\u003e 4L60E, 4L65E, 4L70E transmissions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What does a forward accumulator piston do? \u003cstrong\u003eA:\u003c\/strong\u003e It works inside the transmission valve body to help manage hydraulic pressure during 1-2 and 3-4 shift events, supporting smoother engagement of the forward gear changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How should fitment be verified? \u003cstrong\u003eA:\u003c\/strong\u003e Confirm the transmission model designation and compare the existing accumulator piston part number and bore configuration with the supplied kit before purchase.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThis is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":67611754201361,"sku":"ZZ3P01842","price":38.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/s-l1600_f4313d34-08df-43f1-bf07-40f871f2fcf9.jpg?v=1790991140","url":"https:\/\/www.duraforce.com\/products\/4l60e-4l65e-4l70e-sonnax-fwd-1-2-3-4-pinless-forward-accumulator-piston-kit","provider":"DURAFORCE","version":"1.0","type":"link"}