{"product_id":"pistons-6770845-oem","title":"Piston \/  Metal \/  Allison Mt640 \/  Mt643 Lock Up Piston Oem (oem# 6770845)","description":"\u003ch2\u003eLock Up Piston for Allison MT640 \/ MT643 Automatic Transmission | Various Brands | ATK\u003c\/h2\u003e\u003cp\u003eRestore proper torque converter lockup with this OEM lock up piston, designed specifically for Allison MT640 and MT643 automatic transmissions. Manufactured by ATK to original equipment specifications, this metal piston delivers dependable performance and a precise fit for your rebuild or repair. OEM part number 6770845 ensures you receive the exact replacement component your transmission requires.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM part number 6770845 for exact fit and function\u003c\/li\u003e\n\u003cli\u003eDurable metal construction built to withstand demanding torque converter lockup cycles\u003c\/li\u003e\n\u003cli\u003eManufactured by ATK to meet or exceed original equipment specifications\u003c\/li\u003e\n\u003cli\u003eDirect replacement for Allison MT640 and MT643 automatic transmissions\u003c\/li\u003e\n\u003cli\u003eIdeal for transmission rebuilds, repairs, and preventive maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThis lock up piston is compatible with Allison MT640 and MT643 automatic transmissions across various vehicle brands. Please verify your transmission model and OEM part number 6770845 before ordering to ensure proper fitment.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Part?\u003c\/h3\u003e\u003cp\u003eWhen your Allison transmission needs a reliable lock up piston, choosing an OEM-spec component from ATK means you get quality you can trust. This piston is engineered for long service life and smooth lockup engagement, helping you avoid costly comebacks. Order now and get your Allison MT640 or MT643 back on the road with confidence.\u003c\/p\u003e","brand":"ATK","offers":[{"title":"Default Title","offer_id":49485326483715,"sku":"6770845-OEM","price":596.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0833\/0333\/4147\/files\/6770845-OEM_01.png?v=1792194988","url":"https:\/\/shop.atkits.com\/products\/pistons-6770845-oem","provider":"ATK and parts, LLC","version":"1.0","type":"link"}