{"title":"Transfer Cases and Components","description":null,"products":[{"product_id":"203-conversion-kit-w-o-hubs","title":"Mile Marker NP203 Transfer Case Conversion Kit — Full-Time to Part-Time 4WD (GM203)","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Mile Marker\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eMile Marker engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Mile Marker lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/fuij2PjqNnc\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eUnlock Efficiency: Mile Marker NP203 Transfer Case Conversion Kit\u003c\/h2\u003e\u003cp\u003eTransform your full-time 4WD GM NP203 transfer case into a more versatile part-time system with the \u003cb\u003eMile Marker 203 Conversion Kit (MPN: 501)\u003c\/b\u003e. This essential upgrade allows you to disengage the front driveline when 4WD isn't required, significantly improving fuel economy, reducing tire wear, and extending the lifespan of your front axle components. Experience enhanced control and efficiency for your classic GM truck or SUV.\u003c\/p\u003e\u003ch3\u003eEngineered for Performance and Durability\u003c\/h3\u003e\u003cp\u003eMile Marker's conversion kit is meticulously designed to integrate seamlessly with your existing GM NP203 transfer case. Crafted from high-quality materials, the components ensure reliable performance and long-term durability, even under demanding conditions. This kit provides all the necessary parts for a professional conversion, allowing you to switch between 2WD and 4WD as needed, giving you the best of both worlds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Type:\u003c\/b\u003e Transfer Case Conversion Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompatibility:\u003c\/b\u003e GM NP203 Transfer Cases (Full-Time 4WD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConversion Type:\u003c\/b\u003e Full-Time 4WD to Part-Time 4WD\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKit Contents:\u003c\/b\u003e All necessary components for conversion (does not include hubs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBenefits:\u003c\/b\u003e Improved fuel efficiency, reduced driveline wear, enhanced vehicle control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Advantage of Part-Time 4WD\u003c\/h3\u003e\u003cp\u003eConverting to part-time 4WD offers substantial benefits for vehicles originally equipped with full-time NP203 transfer cases. By eliminating constant front axle rotation, you reduce parasitic drag, leading to better gas mileage and less strain on your drivetrain. This conversion is a popular choice for enthusiasts looking to optimize their vehicle's performance and efficiency. For reliable transfer case solutions, trust GGCRACING.COM and Mile Marker.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Mile Marker products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/1-2-ton-hubs-supreme\" style=\"color:#0066cc;text-decoration:none;\"\u003eMile Marker Supreme Manual Locking Hubs — 1\/2 Ton 19-Spline for Enhanced 4x4 Drivetrain Co\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/spindle-nut-sockets-4-prong\" style=\"color:#0066cc;text-decoration:none;\"\u003eMile Marker Spindle Nut Socket 4-Prong 1\/2in Drive — Universal Fitment\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/atv-utv-winch-accessory-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eMile Marker ATV\/UTV Winch Accessory Kit — Essential Recovery Gear\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/3in-x-15ft-atv-strap\" style=\"color:#0066cc;text-decoration:none;\"\u003eMile Marker Heavy Duty Tow Strap 3in x 15ft — 30,000lb Capacity\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/1-2-ton-hubs-streetmaste\" style=\"color:#0066cc;text-decoration:none;\"\u003eMile Marker Street Master Manual Locking Hub Kit — 1\/2 Ton, 19 Spline, Various Application\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Mile Marker NP203 Transfer Case Conversion Kit \\u2014 Full-Time to Part-Time 4WD (GM203)\",\"description\":\"Convert your GM NP203 transfer case from full-time to part-time 4WD with the Mile Marker 501 conversion kit. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Mile Marker?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Mile Marker NP203 Transfer Case Conversion Kit \\u2014 Full-Time to Part-Time 4WD (GM2?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. 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