The RCV Ultimate OEM Replacement 2.5 Ton Rockwell CV Axle Set is a direct, bolt-in upgrade for factory 2.5-ton Rockwell axles originally equipped with U-joint axle shafts. These axles replace the OEM U-joint design with RCVs proven constant velocity (CV) architecture, delivering dramatically increased strength, smoother power delivery, and superior reliability under extreme load.

Independent testing has shown RCV Ultimate CV Axles to be twice as strong as OEM shafts, maintaining full strength at both straight and extreme steering anglesexactly where U-joints are at their weakest.This OEM-replacement configuration uses 16 spline inner shafts at the differential and 40 spline at the CV joint inner race, preserving factory compatibility while significantly upgrading durability.

Includes:

• (1) Left Ultimate CV axle shaft
• (1) Right Ultimate CV axle shaft
• SST Spherical Sealing Technology seals
• Synthetic moly grease
• Black oxide coating (standard)

Specifications

• Axle Type: 2.5 Ton Rockwell
• Inner Differential Spline: 16 spline (OEM)
• CV Inner Race Spline: 40 spline
• CV Design: Constant Velocity (U-joint replacement)
• Seal Type: SST Spherical Sealing Technology
• Coating: Black oxide
• Maintenance: Low maintenance, fully serviceable

Fitment

• Factory 2.5 Ton Rockwell axles originally equipped with 16 spline differential shafts
• Designed as a direct OEM replacement. No additional modifications required for standard Rockwell housings.

Tech Insight

RCVs 2.5-ton Rockwell CV system eliminates the binding and stress risers inherent to U-joint axle shafts. By maintaining constant rotational velocity through the joint, drivetrain shock is reduced, steering effort is smoother, and component life is dramatically increased. This makes the Ultimate CV Axle Set ideal for extreme rock crawling, military-style builds, heavy trail rigs, and competition vehicles where reliability is non-negotiable.

Optional Configurations

Also available in:

1.75 40 spline

2.0 47 spline

Custom lengths and spline combinations

Contact us directly for custom or special applications.