Ultimate Dana Big Bell 40 Spline CV Axle w/300M Shafts for Ford F-250/350 (2005+)

Transform Your Ford Super Duty's Performance with Unbreakable Strength

Upgrade your 2005+ Ford F-250/F-350 Super Duty with RCV Performance's Ultimate Big Bell CV Axles – the definitive solution for serious off-road enthusiasts and heavy-duty applications. These aren't just replacement axles; they're a complete performance transformation that eliminates the weak points of your factory Dana 60 setup.

Why Choose RCV Ultimate Big Bell CV Axles?

Proven Rockwell Heritage, Ford-Specific Design

Built on our legendary 2.5-ton Rockwell CV platform, these Big Bell axles feature a custom outer stub engineered specifically for the large 32-spline 2005+ Ford Dana 60 Super Duty unit bearing. You get military-grade reliability with perfect Ford fitment.

300M Steel Construction

Every critical component is forged from premium 300M steel – the same ultra-high-strength alloy used in aerospace and racing applications. The 40-spline inner shafts and internal CV components deliver uncompromising strength that laughs at big tires and big power.

Eliminate U-Joint Weaknesses Forever

Say goodbye to U-joint binding, vibration, and catastrophic failures. Our constant velocity design provides smooth, consistent power transfer whether you're crawling over rocks or cruising the highway. Feel the difference in every drive.

Simplified, Stronger Design

By integrating directly with your Super Duty's unit bearing, these axles eliminate the need for lock-out hubs or drive flanges – reducing complexity while dramatically increasing reliability. Fewer failure points mean more time on the trail.

Complete Kit Includes:

• Left and right CV axle shafts with 300M construction
• Premium SST seals for long-lasting protection
• Synthetic moly grease for optimal performance
• Complete installation hardware
• Detailed installation instructions
• Standard black oxide coating (nickel plating available for marine/salt environments)

Technical Specifications:

• Compatibility: 2005+ Ford F-250/F-350 Super Duty with aftermarket 40-spline locker
• Inner Spline Count: 40 (upgraded from OEM 35)
• Outer Connection: Large 32-spline unit bearing
• Long Inner Axle: 39.01"
• Short Inner Axle: 16.78"
• Outer Stub: 7.03"

Important Installation Notes:

This kit requires modification to OEM Ford knuckles, including a ball joint eliminator kit and minor machining for proper clearance. Complete installation guide provided. Professional installation recommended.

Does not fit OEM 35-spline carriers – aftermarket 40-spline locker required.

Unmatched Warranty Confidence

We stand behind our Ultimate CV Axles with a "No Questions Asked" Limited Lifetime Warranty. When you invest in RCV, you invest in axles that are built to outlast your truck.

Perfect For:

• Heavy-duty towing and hauling
• Serious off-road adventures
• Rock crawling and extreme terrain
• High-horsepower builds
• Commercial and fleet applications

The RCV Difference

With decades of experience building the world's strongest CV axles for military, commercial, and performance applications, RCV Performance has earned the trust of professionals worldwide. When failure is not an option, choose RCV.

Ready to eliminate your axle worries forever? Upgrade to RCV Ultimate Big Bell CV Axles and experience the confidence that comes with unbreakable strength.