Drivetrain› 4x4 Driveline Components

Mile Marker

Mile Marker Transfer Case Adapter Kit

$99.00

SKU: M01O 501

In Stock
In Stock
Ships by Jul 29
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

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.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMile Marker
Part NumberM01O 501

Buy with Confidence

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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