Upgrade your classic Ford F-150 or Bronco Dana 44 front axle with the unbeatable strength and smoothness of the RCV Ultimate CV Axle Set. These high strength constant velocity axles replace the weak factory U-joint shafts, delivering twice the strength of OEM and maintaining full power transfer at every steering angle.

Unlike U-joints, whose strength drops drastically when turned, RCV CV joints remain just as strong at full lock as they are straight. This eliminates binding, improves steering feel, and drastically reduces breakage when running lockers, big tires, or high torque engines.

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

Includes:

• Left & right CV axle shafts
• 30 spline outer stubs
• SST seals & installation tool
• Synthetic moly grease
• Installation instructions
• Installation hardware
• 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: 18.91
• Right Inner Axle Length: 33.91
• Outer Stub Axle Length: 9.72
• Boot Technology: RCV bootless, sealed-joint design
• Warranty Note: Warranty is void over 40" tires

Fitment

Compatible with Dana 44 front axles on:

• Ford F-150 19681979
• Ford Bronco 19781979

Requirements:

• Must upgrade to 30 spline hub gears
• Compatible with Warn 20990 Premium Lockouts
• Not compatible with factory 19 spline lockouts without upgrading.

Tech Insight

Factory Ford Dana 44 shafts use a 19 spline outer design and U-joints, both of which severely limit strength when adding torque, lockers, or large tires. The RCV Ultimate CV Axle solves these weaknesses with:

• 30 spline outer stubs for improved hub interface
• A constant velocity joint that maintains full torque at any steering angle
• Stronger materials and smoother rotation for increased reliability

This upgrade modernizes steering performance and dramatically increases durability for both restored and off-road ready F-Series trucks and Broncos.