{"product_id":"722-9-one-k1-clutch-bonded-piston-220-272-3231","title":"K1 Clutch Bonded Piston fits Mercedes-Benz 722.9 7G-Tronic Trans 2004-Up","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eK1 Clutch Bonded Piston — Compatible with Mercedes-Benz 722.9 7G-Tronic Transmission\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis K1 Clutch Bonded Piston is built as a direct replacement for OEM 220-272-3231, designed for the Mercedes-Benz 722.9 (7G-Tronic) 7-speed automatic transmission.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhy You Need This Part\u003c\/strong\u003e\nThe K1 bonded piston is a known wear item in the 722.9 transmission. As the bonded rubber seal ages, it can crack or lose its seal, causing:\u003c\/p\u003e\n\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHarsh or delayed gear shifts\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSlipping between gears\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eShift flares on the 1-2 or 2-3 shift\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNo-movement or hesitation when accelerating\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBurnt smell from a slipping K1 clutch pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eReplacing the bonded piston restores proper hydraulic apply pressure to the K1 clutch pack, helping bring shift quality back to factory feel.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\nFits Mercedes-Benz 722.9 \/ 7G-Tronic 7-speed automatic transmissions found in:\u003c\/p\u003e\n\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eC-Class, E-Class, S-Class, CL-Class, CLS-Class\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSL-Class, SLK-Class, ML-Class, GL-Class, GLK-Class, R-Class\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSprinter Van (Mercedes-Benz and Freightliner)\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eModel years 2004 and newer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003ePlease confirm your transmission code (722.9) before purchasing to ensure correct fitment.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eInstallation Note\u003c\/strong\u003e\nThis part is intended for use during a 722.9 K1 clutch service or full transmission rebuild. Use proper transmission assembly procedures and torque specs when reinstalling.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQuick Tip\u003c\/strong\u003e\nPairing your rebuild with Lubegard ATF is a smart move — it's trusted by transmission rebuilders for smoother shifts and added protection right from break-in.\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52425190506677,"sku":"136766 PAFT","price":56.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/7229-K1-Clutch-Bonded-Piston-2202723231-293059026861.jpg?v=1786614891","url":"https:\/\/transpartsdirect.com\/products\/722-9-one-k1-clutch-bonded-piston-220-272-3231","provider":"Trans Parts Direct","version":"1.0","type":"link"}