Mile Marker NP203 Transfer Case Conversion Kit — Full-Time to Part-Time 4WD (GM203)

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SKU: BCBT_501
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Sale price$99.00 Regular price$99.99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Mile Marker

Mile 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.

Watch in action

Unlock Efficiency: Mile Marker NP203 Transfer Case Conversion Kit

Transform your full-time 4WD GM NP203 transfer case into a more versatile part-time system with the Mile Marker 203 Conversion Kit (MPN: 501). 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.

Engineered for Performance and Durability

Mile 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.

  • Product Type: Transfer Case Conversion Kit
  • Compatibility: GM NP203 Transfer Cases (Full-Time 4WD)
  • Conversion Type: Full-Time 4WD to Part-Time 4WD
  • Kit Contents: All necessary components for conversion (does not include hubs)
  • Benefits: Improved fuel efficiency, reduced driveline wear, enhanced vehicle control

The Advantage of Part-Time 4WD

Converting 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.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Mile Marker

Mile 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.

Watch in action

Unlock Efficiency: Mile Marker NP203 Transfer Case Conversion Kit

Transform your full-time 4WD GM NP203 transfer case into a more versatile part-time system with the Mile Marker 203 Conversion Kit (MPN: 501). 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.

Engineered for Performance and Durability

Mile 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.

  • Product Type: Transfer Case Conversion Kit
  • Compatibility: GM NP203 Transfer Cases (Full-Time 4WD)
  • Conversion Type: Full-Time 4WD to Part-Time 4WD
  • Kit Contents: All necessary components for conversion (does not include hubs)
  • Benefits: Improved fuel efficiency, reduced driveline wear, enhanced vehicle control

The Advantage of Part-Time 4WD

Converting 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.

Product Details

Product Description

About Mile Marker

Mile 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.

Watch in action

Unlock Efficiency: Mile Marker NP203 Transfer Case Conversion Kit

Transform your full-time 4WD GM NP203 transfer case into a more versatile part-time system with the Mile Marker 203 Conversion Kit (MPN: 501). 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.

Engineered for Performance and Durability

Mile 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.

  • Product Type: Transfer Case Conversion Kit
  • Compatibility: GM NP203 Transfer Cases (Full-Time 4WD)
  • Conversion Type: Full-Time 4WD to Part-Time 4WD
  • Kit Contents: All necessary components for conversion (does not include hubs)
  • Benefits: Improved fuel efficiency, reduced driveline wear, enhanced vehicle control

The Advantage of Part-Time 4WD

Converting 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.

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