{"product_id":"mile-marker-4-x-2-conversion-kit-ford-and-gm-203-transfer-case-w-o-hubs-mile-marker-501-bcbt","title":"4 x 2 Conversion Kit Ford And GM 203 Transfer Case w\/o Hubs Mile Marker","description":"\u003cp\u003eMile Marker NP203 4x2 Conversion Kit is engineered to convert factory full-time New Process 203 transfer cases into part-time four wheel drive systems for improved efficiency and reduced drivetrain wear. Designed for 1973 to 1979 Ford, GM, and Dodge vehicles equipped with the NP203 transfer case, this kit eliminates constant front axle engagement while maintaining the strength and durability of the original transfer case. Full-time NP203 systems were originally designed to keep the front drivetrain engaged at all times, increasing component wear and reducing fuel efficiency.\u003c\/p\u003e\n\u003cp\u003eThe Mile Marker conversion kit replaces internal differential components, allowing the transfer case to operate in true part-time mode when paired with manual locking hubs. This reduces unnecessary front axle rotation, decreases wear on drivetrain components, and can improve fuel economy while preserving off-road capability when engaged. Engineered with precision-machined components and backed by decades of drivetrain experience, the NP203 conversion kit provides installers and restoration specialists with a proven solution for modernizing classic full-size trucks.\u003c\/p\u003e\n\u003cp\u003eThis version does not include locking hubs and is intended for use with compatible manual hub applications. Built for reliability, durability, and long-term performance, Mile Marker restores control to your drivetrain without compromising strength.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures and Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConverts NP203 from full-time to true part-time four wheel drive.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for 1973 to 1979 Ford, GM, and Dodge NP203 systems.\u003c\/li\u003e\n\u003cli\u003eHelps improve fuel efficiency and component longevity.\u003c\/li\u003e\n\u003cli\u003ePrecision-machined components engineered for durability.\u003c\/li\u003e\n\u003cli\u003eReduces front drivetrain wear and parasitic drag.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAssociated Comments:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned to work with 1973 to 1979 Ford, GM, and Dodge vehicles equipped with New Process 203 transfer cases. Converts factory full-time four wheel drive systems to part-time operation. Manual locking hubs are required and sold separately. Verify transfer case model prior to installation.\u003c\/li\u003e\n\u003cli\u003eEngineered specifically for NP203 transfer case applications only. Requires compatible manual locking hubs for proper part-time operation. Professional installation recommended. Follow factory service manual procedures during transfer case disassembly and reassembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDetails:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSeries: Premium Series\u003c\/li\u003e\n\u003cli\u003eMaterial: Combination\u003c\/li\u003e\n\u003cli\u003eWarranty: 1 Year\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Quadratec","offers":[{"title":"Material: Combination \/ Series: Premium Series \/ Sold As: Kit","offer_id":49224674148579,"sku":"501-BCBT","price":103.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4343\/1651\/files\/501-BCBT.jpg?v=1781033628","url":"https:\/\/shop.blackflagoffroad.com\/products\/mile-marker-4-x-2-conversion-kit-ford-and-gm-203-transfer-case-w-o-hubs-mile-marker-501-bcbt","provider":"Black Flag Off-Road","version":"1.0","type":"link"}