Give your classic Ford truck the axle strength it always needed. The RCV Performance Ultimate Dana 44 CV Axle Set replaces the factory U-joint shafts in your Ford F-250 or F-150 SuperCab with a high strength constant velocity design proven to be twice as strong as OEM.

Unlike U-joints, which weaken significantly when steering angle increases, RCV CV joints maintain full strength at all angles. This provides a smoother, more reliable transfer of power to the ground. No binding, no vibration, and drastically reduced risk of axle failure when running larger tires or added horsepower.

These axles are ideal for restored trucks, heavy duty trail rigs, or classic builds running V8 power, lockers, or oversized tires.

IMPORTANT NOTE: All CVJ44OS axle kits require a 30 spline hub gear upgrade. RCV hub gears are compatible with Warn 20990 Premium Lockouts.

Includes:

• Left & right 30 spline RCV CV axle shafts
• 30 spline outer stubs
• SST seals & installation tool
• Synthetic moly grease
• Installation hardware
• Installation instructions
• Black oxide finish (standard)
• Optional nickel plating available

Specifications

• Axle Model: Dana 44
• Unit Bearing: No
• OEM Inner Spline: 30
• OEM Outer Spline: 19
• RCV Inner Spline: 30
• RCV Outer Spline: 30 (requires 30 spline hub gear upgrade)
• Left Inner Axle Length: 18.62
• Right Inner Axle Length: 34.75
• Outer Stub Axle Length: 9.72
• Boot Technology: RCV bootless, sealed-joint design
• Warranty Note: Warranty is void over 40" tires

Fitment

Compatible with:

• Ford F-250 19671979 (Dana 44 front axle)
• Ford F-150 SuperCab 19781979 (Dana 44 front axle)

  Requirements:

• Must upgrade to 30 spline hub gears
• Compatible with Warn 20990 Premium Lockouts
• Not compatible with stock 19 spline hub gears.

Tech Insight

The original Ford Dana 44 front axle uses a 19 spline outer shaft and U-joint configurationboth are limiting factors when pushing power, running big tires, or adding lockers. The RCV Ultimate CV Axle upgrades the outer shafts to 30 spline while eliminating the weak U-joint entirely.

Benefits include:

• Full-angle steering strength with no binding
• Stronger outer shaft interface with the lockouts
• Dramatically increased torque capacity
• Reduced wear and tighter steering feel
• Perfect for restored classics and heavy-duty wheeling

This upgrade brings modern performance technology to a vintage Ford platform.