{"product_id":"3-inch-transfer-case-adapter-kit","title":"3-Inch Transfer Case Adapter Kit","description":"The Novak Conversions 4L61-23 adapter kit provides a high-strength, compact solution for pairing GM 4L60E, 4L65E, and 4L70E automatic transmissions with Jeep New Process transfer cases. The adapter housing is CNC-machined from 6061-T6 aluminum, featuring a modular steel mounting base that accepts standard urethane isolator mounts. The kit includes an E4340 alloy steel 23-spline output shaft, which offers superior durability over factory components.\n\nCompatibility is limited to 1996 and later 4L60E-style transmissions featuring the hexagonal six-bolt rear pattern and detachable bellhousing. Some 1999 and earlier models with four-bolt rear patterns are not compatible with this specific kit. Furthermore, this adapter is engineered exclusively for 23-spline Jeep NP207, NP231, NP242, NP249, and NP241OR transfer cases. Because 21-spline shafts are significantly weaker, this kit is not compatible with 21-spline transfer cases without first performing an input gear swap to a 23-spline version.\n\nInstallation is a bench-level task that requires transmission disassembly; professional services are strongly recommended. If using a non-factory engine configuration, an aftermarket transmission controller is required to maintain proper shifting and line pressure. Additionally, users of Gen IV 4L60E transmissions should note that these units contain a specialized Transmission Control Module that is sensitive to engine controller compatibility, making matched Gen III control systems the recommended setup. Proper powertrain pitch and offset must be verified during installation to ensure clearances.","brand":"Novak Conversions","offers":[{"title":"Default Title","offer_id":52689312940344,"sku":"4L61-23","price":671.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687519094.jpg?v=1784904964","url":"https:\/\/store.motormia.co\/products\/3-inch-transfer-case-adapter-kit","provider":"MOTORMIA","version":"1.0","type":"link"}