Drivetrain 4x4 Driveline Components

Mile Marker

Mile Marker Transfer Case Adapter Kit

$99.00

SKU: M01O 501

In Stock
In Stock
Ships by Sep 17
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Mile Marker 501 is a transfer case conversion kit designed to convert factory full-time NP203 transfer cases into part-time four-wheel-drive systems. This kit is engineered for 1973 to 1979 Ford, GM, and Dodge vehicles equipped with the NP203 transfer case. By replacing internal differential components, it eliminates constant front axle engagement, reducing drivetrain wear and improving fuel efficiency.
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Part #: 501

Mile Marker Industries has been the leader in high quality, highly durable, hydraulic and electric winches, mounting systems, locking hubs, snatch blocks, shackles, tow and rigging ropes, recovery kits, vehicle accessories and more to off-road motorists for over 3 decades.You can trust a Mile Marker product on your ride. All our military products undergo rigorous testing and each is rated for the highest break strength standard in the industry and are constructed from quality USA made materials.When you need high quality, highly reliable, well-tested products for your ATV or 4x4, having Mile Marker on your vehicle gives you the confidence and piece of mind you want.Getting out and enjoying life is what you live for, Mile Marker had your winch needs covered so you can keep making memories, getting the job done and taking on new adventures. Mile Marker has your back. Welcome to the Family!

Features:

  • Count on these kits to reduce wear and tear on your drivetrain as well as saving at the gas pump
  • In some cases, these are the only kits available for your vehicle
  • In all cases, each kit has been carefully designed to provide years of trouble free service
  • Make Your Own Shaft Type Conversion: Our Mile Marker Kit is the result of over two years of experimental kits and testing
  • It has all the advantages of the best shaft type conversion kits, yet it uses all the original parts, with no new yokes necessary
  • It has none of the disadvantages of the crown type kits by being one unit
  • No thrust is applied to the bearing
  • Our bearing serves as a spacer to keep the chain sprocket clear of the planetary ring
  • No elbow for extra oil
  • Simple-Easy Installation
  • Fits All Transfer 203 Cases
  • Increase Gas Mileage Up To 30 percent
  • Improve Tire Life
  • Get Better Handling
  • Extend Drive Train Life

Mile Marker 4 x 2 Conversion Kit Ford And GM 203 Transfer Case w/o Hubs

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMile Marker
Part NumberM01O 501

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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