{"product_id":"k-4223-genuine-eaton®-gen-3-xy-shifter-kit-new-exch-heavy","title":"K-4223 | Genuine Eaton® Gen 3 XY Shifter Kit, New Exch (Heavy)","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003cbr\u003e\u003c\/strong\u003eA Gen 3 XY Shifter Kit, New Exch\u003cstrong\u003e K-4223\u003c\/strong\u003e is a heavy-duty truck transmission component, not a typical car “shifter.” It’s used in automated manual transmissions—especially Eaton Fuller gearboxes found in semi-trucks. Gen 3 XY Shifter Kit, New Exch (Heavy)  For Heavy-duty Eaton Corporation \/ Fuller automated manual transmissions (Eaton Fuller UltraShift,Eaton Fuller UltraShift PLUS,Eaton Fuller AutoShift)\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003ePart Number\u003c\/strong\u003e: K-4223\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003cspan\u003e: New\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eManufacture\/Brand\u003c\/strong\u003e\u003cspan\u003e: Eaton\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003eFits K-4223 \u003c\/strong\u003eFor Heavy-duty \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eEaton Corporation\u003c\/span\u003e\u003c\/span\u003e \/ Fuller automated manual transmissions (\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eEaton Fuller UltraShift, \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eEaton Fuller UltraShift PLUS, \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eEaton Fuller AutoShift),\u003c\/span\u003e\u003c\/span\u003especifically for \u003cspan style=\"font-size: 0.875rem;\"\u003eheavy-duty (HD) transmissions\u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e, not medium-duty.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-end=\"610\" data-start=\"366\"\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePurpose of using K-4223:\u003c\/strong\u003e\u003cstrong data-start=\"585\" data-end=\"597\"\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp data-end=\"545\" data-start=\"511\" data-section-id=\"hvg9xb\"\u003e\u003cspan role=\"text\"\u003e1. \u003cstrong data-end=\"545\" data-start=\"518\"\u003eGear selection (X-axis)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-end=\"657\" data-start=\"546\"\u003e\n\u003cli data-end=\"600\" data-start=\"546\" data-section-id=\"1s7z0nr\"\u003eMoves side-to-side to choose the correct gear rail\u003c\/li\u003e\n\u003cli data-end=\"657\" data-start=\"601\" data-section-id=\"1fax7i9\"\u003eExample: switching from the 3–4 rail to the 5–6 rail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"694\" data-start=\"659\" data-section-id=\"fea8xs\"\u003e\u003cspan role=\"text\"\u003e2. \u003cstrong data-end=\"694\" data-start=\"666\"\u003eGear engagement (Y-axis)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-end=\"750\" data-start=\"695\"\u003e\n\u003cli data-end=\"750\" data-start=\"695\" data-section-id=\"19612j0\"\u003ePushes\/pulls to physically engage the selected gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"780\" data-start=\"752\" data-section-id=\"1x3wygb\"\u003e\u003cspan role=\"text\"\u003e3. \u003cstrong data-end=\"780\" data-start=\"759\"\u003ePosition feedback\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-end=\"900\" data-start=\"781\"\u003e\n\u003cli data-end=\"900\" data-start=\"781\" data-section-id=\"18kphi3\"\u003eUses sensors to tell the transmission controller:\n\u003cul data-end=\"900\" data-start=\"835\"\u003e\n\u003cli data-end=\"856\" data-start=\"835\" data-section-id=\"1uakxvn\"\u003eWhat gear it’s in\u003c\/li\u003e\n\u003cli data-end=\"900\" data-start=\"859\" data-section-id=\"1ulhtye\"\u003eWhether the shift completed correctly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of a Bad Gen 3 XY Shifter Kit K-4223\u003cspan\u003e:\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp data-end=\"404\" data-start=\"358\" data-section-id=\"12k0ud9\"\u003e\u003cstrong\u003e1. Won’t shift or gets stuck in neutral\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"546\" data-start=\"405\"\u003e\n\u003cli data-end=\"445\" data-start=\"405\" data-section-id=\"7djngi\"\u003eTruck won’t go into gear from a stop\u003c\/li\u003e\n\u003cli data-end=\"502\" data-start=\"446\" data-section-id=\"bdvztp\"\u003eMay stay stuck in neutral even with throttle applied\u003c\/li\u003e\n\u003cli data-end=\"546\" data-start=\"503\" data-section-id=\"1ryw4g6\"\u003eOne of the most common failure symptoms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"594\" data-start=\"553\" data-section-id=\"m5uilx\"\u003e\u003cstrong\u003e2. Hard, delayed, or missed shifts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"693\" data-start=\"595\"\u003e\n\u003cli data-end=\"620\" data-start=\"595\" data-section-id=\"t0a2ir\"\u003eRough gear engagement\u003c\/li\u003e\n\u003cli data-end=\"649\" data-start=\"621\" data-section-id=\"37kesf\"\u003eLong delay between gears\u003c\/li\u003e\n\u003cli data-end=\"693\" data-start=\"650\" data-section-id=\"rw0fh1\"\u003eSkips gears or fails to complete shifts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"751\" data-start=\"700\" data-section-id=\"fgx50e\"\u003e\u003cstrong\u003e3. Transmission fault codes \/ warning lights\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"905\" data-start=\"752\"\u003e\n\u003cli data-end=\"786\" data-start=\"752\" data-section-id=\"ntutgo\"\u003e“Service Transmission” warning\u003c\/li\u003e\n\u003cli data-end=\"833\" data-start=\"787\" data-section-id=\"174zmm4\"\u003eCheck engine light related to transmission\u003c\/li\u003e\n\u003cli data-end=\"905\" data-start=\"834\" data-section-id=\"1w26geb\"\u003eCommon in trucks using Eaton Fuller UltraShift or AutoShift systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"941\" data-start=\"912\" data-section-id=\"1m8vb6a\"\u003e\u003cstrong\u003e4. Gear display issues\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1070\" data-start=\"942\"\u003e\n\u003cli data-end=\"972\" data-start=\"942\" data-section-id=\"1on483y\"\u003eDashboard shows wrong gear\u003c\/li\u003e\n\u003cli data-end=\"1012\" data-start=\"973\" data-section-id=\"1jljxly\"\u003eGear indicator flashes or shows “—”\u003c\/li\u003e\n\u003cli data-end=\"1070\" data-start=\"1013\" data-section-id=\"1g31ozr\"\u003eIndicates position sensor problems inside the shifter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1117\" data-start=\"1077\" data-section-id=\"19nmn11\"\u003e\u003cstrong\u003e5. Intermittent shifting problems\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1258\" data-start=\"1118\"\u003e\n\u003cli data-end=\"1161\" data-start=\"1118\" data-section-id=\"n2o1rn\"\u003eWorks fine sometimes, fails other times\u003c\/li\u003e\n\u003cli data-end=\"1258\" data-start=\"1162\" data-section-id=\"18i0qk9\"\u003eOften caused by:\n\u003cul data-end=\"1258\" data-start=\"1183\"\u003e\n\u003cli data-end=\"1206\" data-start=\"1183\" data-section-id=\"8gql7p\"\u003eInternal motor wear\u003c\/li\u003e\n\u003cli data-end=\"1227\" data-start=\"1209\" data-section-id=\"c1z6wu\"\u003eSensor failure\u003c\/li\u003e\n\u003cli data-end=\"1258\" data-start=\"1230\" data-section-id=\"1dretef\"\u003eWiring\/connection issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1304\" data-start=\"1265\" data-section-id=\"1fd5mf7\"\u003e\u003cstrong\u003e6. Stuck in one gear (limp mode)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1399\" data-start=\"1305\"\u003e\n\u003cli data-end=\"1360\" data-start=\"1305\" data-section-id=\"e9lque\"\u003eTruck locks into a single gear (usually 3rd or 5th)\u003c\/li\u003e\n\u003cli data-end=\"1399\" data-start=\"1361\" data-section-id=\"48092w\"\u003eDesigned to let you limp to a shop\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1445\" data-start=\"1406\" data-section-id=\"1sg5m3m\"\u003e\u003cstrong\u003e7. Clicking or no movement sound\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1557\" data-start=\"1446\"\u003e\n\u003cli data-end=\"1557\" data-start=\"1446\" data-section-id=\"1uelg87\"\u003eYou may hear:\n\u003cul data-end=\"1557\" data-start=\"1464\"\u003e\n\u003cli data-end=\"1516\" data-start=\"1464\" data-section-id=\"1hhubbk\"\u003eClicking but no shift (motor trying but failing)\u003c\/li\u003e\n\u003cli data-end=\"1557\" data-start=\"1519\" data-section-id=\"k371n1\"\u003eOr no sound at all (dead actuator)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"97\" data-end=\"476\"\u003e\u003cstrong data-start=\"97\" data-end=\"151\"\u003eAbout the Manufacturer – \u003c\/strong\u003e\u003cstrong data-start=\"97\" data-end=\"151\"\u003eEaton:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"539\" data-start=\"196\"\u003eEaton is a global leader in power management and industrial manufacturing, known for delivering high-performance components and systems across automotive, aerospace, electrical, and hydraulic industries. Founded in 1911, Eaton has built a century-long reputation for reliability, innovation, and engineering excellence.\u003c\/p\u003e\n\u003cp data-end=\"849\" data-start=\"541\"\u003eIn the commercial vehicle industry, Eaton is best known for its Fuller® transmissions, heavy-duty clutches, and automated manual transmission (AMT) systems. Eaton products are widely used by major OEMs including Kenworth, Peterbilt, Freightliner, Volvo, and International.\u003c\/p\u003e","brand":"Eaton","offers":[{"title":"Default Title","offer_id":50671065727223,"sku":"K-4223","price":1199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/7080\/3959\/files\/photo_2026-04-08_07-11-28.jpg?v=1775621670","url":"https:\/\/forcetruckparts.com\/products\/k-4223-genuine-eaton%c2%ae-gen-3-xy-shifter-kit-new-exch-heavy","provider":"Force Truck Parts","version":"1.0","type":"link"}