RCV Ultimate CV Axle Set for Dana 44 Ford F-250 & F-150 Supercab

Key Features:

• Heavy-duty CV axle set for compatible classic Ford Dana 44 front axles.
• Engineered for up to twice the strength of factory axle shafts.
• 30-spline inner shafts and upgraded 30-spline outer stub configuration.
• Constant velocity joints provide smooth torque transfer through increased steering angles.
• Eliminates conventional U-joint binding and associated strength limitations.
• Sealed, bootless CV joint design for demanding off-road conditions.
• Includes left and right axle assemblies, SST seals, installation hardware, and grease.
• Compatible with Warn 20990 Premium Lockouts when equipped with RCV 30-spline hub gears.

Designed for compatible classic Ford trucks equipped with the specified Dana 44 front axle, serviceable spindle and hub configuration, and required 30-spline locking hub gear upgrade.

Required Axle Configuration:

• Compatible Ford Dana 44 front axle housing.
• 30-spline inner axle shaft configuration.
• Serviceable spindle and locking hub assembly.
• 30-spline locking hub gear upgrade for RCV outer stub shafts.
• Warn 20990 Premium Lockouts when equipped with compatible RCV 30-spline hub gears.

Known Incompatibilities:

• Factory 19-spline locking hub gears without the required upgrade.
• Front axle assemblies with incompatible inner spline counts.
• Dana 30 or Dana 60 front axle applications.
• Modified or axle-swapped housings with incompatible shaft lengths or wheel-end configurations.

Important Fitment Notes:

• All CVJ44OS axle kits require a 30-spline hub gear upgrade.
• RCV 30-spline hub gears are compatible with Warn 20990 Premium Lockouts.
• Confirm whether the required hub gears are included or purchased separately.
• Verify axle shaft lengths, differential spline count, and hub configuration before ordering.
• Not every Ford F-250 or F-150 SuperCab in the listed year ranges uses the same front axle configuration.
• The supplied warranty information states that use with tires larger than 40" voids the warranty.

Builder Note: The factory Ford Dana 44 front axle uses a 19-spline outer stub configuration that must be addressed when upgrading to RCV Ultimate CV shafts. This kit upgrades the outer stubs to 30 splines, requiring matching locking hub gears. Plan the axle shafts, differential, spindle, and locking hubs as a complete assembly before installation to avoid mismatched components.

What Ford trucks does this RCV Ultimate CV axle set fit?

This axle set is listed for compatible 1967–1979 Ford F-250 and 1978–1979 Ford F-150 SuperCab trucks equipped with the specified Dana 44 front axle. Verify the installed axle, shaft lengths, spline counts, and locking hub configuration before ordering.

Are RCV Ultimate CV axle shafts stronger than factory Ford Dana 44 shafts?

RCV designs its Ultimate CV axle shafts to deliver up to twice the strength of factory axle shafts. The constant velocity design also helps maintain strength through increased steering angles where conventional U-joints can become more vulnerable to binding and failure.

Do these RCV axle shafts require upgraded locking hubs?

Yes. The RCV CVJ44OS axle set uses 30-spline outer stub shafts, requiring matching 30-spline locking hub gears. Factory 19-spline hub gears are not compatible with the upgraded shafts.

Will this axle set work with Warn 20990 Premium Lockouts?

Yes. RCV specifies that its 30-spline hub gears are compatible with Warn 20990 Premium Lockouts. The correct 30-spline hub gears must be installed to match the RCV outer stub shafts.

Are the 30-spline hub gears included?

The supplied product information identifies the 30-spline hub gear upgrade as required but does not confirm that the hub gears are included. Verify the kit contents before ordering.

What is the advantage of RCV CV joints over factory U-joints?

RCV Ultimate CV joints provide constant velocity torque transfer through the steering range. This helps eliminate conventional U-joint binding and reduces the strength limitations associated with U-joints operating at increased steering angles.

Does this kit include both front axle shafts?

Yes. The kit includes left and right RCV Ultimate CV axle shafts, 30-spline outer stub assemblies, SST seals, installation hardware, synthetic moly grease, and installation instructions.

Can I use these axle shafts with larger tires and locking differentials?

Yes. The RCV Ultimate CV design is intended for demanding off-road applications where larger tires and locking differentials increase drivetrain loads. However, the supplied warranty information states that tires larger than 40" void the warranty.

What is the RCV bootless CV joint design?

RCV uses a sealed constant velocity joint without a conventional external rubber CV boot. This eliminates a component commonly exposed to damage from rocks, branches, and off-road debris.

Can these RCV axle shafts be used on street-driven classic Ford trucks?

Yes. The constant velocity design provides smooth torque transfer during steering, making the axle set suitable for compatible trucks used on-road and off-road when properly installed and maintained.

Is nickel plating available?

The standard axle set features a black oxide finish. Optional nickel plating may be available by special request. Contact us to confirm availability and pricing.