{"product_id":"6l80-6l90-transmission-high-capacity-4-5-6-clutch-apply-piston-kit-104960-10k-copy","title":"6L80 6L90 Transmission Heavy Duty 4-5-6 Clutch Apply Piston Kit 104960-01K","description":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch1 style=\"text-align: left;\"\u003e\n\u003cb\u003e6L80 - 6L90\u003c\/b\u003e\u003cbr\u003e\n\u003c\/h1\u003e\n\u003ch2 style=\"text-align: left;\"\u003e\u003cb\u003eHeavy Duty 4-5-6 Clutch Apply Piston Kit\u003c\/b\u003e\u003c\/h2\u003e\n\u003ch1 style=\"text-align: left;\"\u003e\u003csmall\u003e(1) of Part No. \u003cb\u003e104960-01K\u003c\/b\u003e\u003c\/small\u003e\u003c\/h1\u003e\n\u003cdiv class=\"spaced-vertical\"\u003e\n\u003cdiv class=\"spaced-vertical\" style=\"text-align: left;\"\u003e\n\u003cdiv class=\"spaced-vertical\"\u003e\n\u003cp\u003eGM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures exceed OE specifications. The other problem is flexing and bowing of the backing plate (coning), which is a primary source of clutch failure.\u003c\/p\u003e\n\u003cp\u003eThe heavy duty Sonnax 4-5-6 clutch apply piston kit 104960-01K addresses these weak areas in two ways:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eA modified OE clutch apply piston and piston dam are used in conjunction with a specially-designed Sonnax piston apply ring.\u003c\/li\u003e\n\u003cli\u003eA more rigid backing plate.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe Sonnax apply ring increases surface area between the apply piston and OE waved clutch plate, resulting in more even distribution of apply force to clutch plates. The Sonnax backing plate minimizes flexing\/bowing when clutch is applied, drastically reducing the likelihood of clutch plate distortion.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse with stock clutches and OE waved plate\u003c\/li\u003e\n\u003cli\u003eSolid backing plate design outperforms OE and aftermarket plates\u003c\/li\u003e\n\u003cli\u003eIncreased apply ring surface area improves clutch apply\u003c\/li\u003e\n\u003cli\u003eReduces heat buildup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"part-accordion cb spaced-vertical\"\u003e\n\u003cdiv id=\"components\"\u003e\n\u003clabel for=\"components-panel\"\u003eContents\u003c\/label\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eApply Piston\u003c\/li\u003e\n\u003cli\u003eApply Ring\u003c\/li\u003e\n\u003cli\u003ePiston Dam\u003c\/li\u003e\n\u003cli\u003eBacking Plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sonnax","offers":[{"title":"Default Title","offer_id":47950383218910,"sku":"S45564C","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/5464\/5470\/files\/S45564C_1_c74a490a-a010-44ec-9057-91701c151382.jpg?v=1772728620","url":"https:\/\/transmissioncenter.net\/products\/6l80-6l90-transmission-high-capacity-4-5-6-clutch-apply-piston-kit-104960-10k-copy","provider":"Transmission Center","version":"1.0","type":"link"}