Sway-A-Way VW IRS Axle Set | 33-Tooth Spline | 15 5/8" (2015)

Sway-A-Way VW IRS Axle Set | 33-Tooth Spline | 15 5/8" (2015)

Sway-A-Way specialized IRS axle set for high-performance Volkswagen Independent Rear Suspension setups. An extended spline design removes the inboard shoulder, allowing the CV joint to float along the shaft.

That float is critical for long-travel off-road buggies or lowered street cars, preventing the CV cage from bottoming out and shattering during extreme suspension articulation.

Vehicle Fitment

• VW Beetle (IRS): 1968–1979
• VW Super Beetle: 1971–1979
• Buggy IRS Builds: All Years

Why Choose Sway-A-Way?

Sway-A-Way manufactures these axles from solid high-strength alloy steel, through-hardens them for the right balance of surface hardness and core flexibility, and centerless grinds them for a consistent diameter that resists stress risers.

Key Features & Benefits

• Extended floating spline: the 2 3/8" spline without a shoulder lets the CV slide freely, accommodating track-width changes and eliminating cage breakage caused by axle bind.
• High-strength alloy steel: built to handle the torque loads of high-horsepower air-cooled engines.
• Through-hardened: balance of surface hardness and core flexibility.
• Powder-coated: industrial-grade finish for long-term corrosion resistance.

Technical Specifications

• Application: high-performance IRS rear axle set
• Length: 15 5/8"
• Spline: 33-tooth (1.062" OD, 2 3/8" spline length)
• Fitment: VW Type 1 (Beetle/Bug), Type 2 (Bus/Transporter), and Type 3 (Notchback, Squareback, Fastback) IRS models
• CV Compatibility: standard 33-spline CV joints (typically Type 1 or Type 2 / 002 styles depending on hub setup)
• Material: solid high-strength alloy steel
• Finish: industrial-grade powder coating
• Sold As: one pair, with Spirol Lock circlips to secure the CV joints
• Manufacturer Part Number: 2015 (SKU SAW-2015)
• Warranty: 1-year warranty

Frequently Asked Questions

• What is the axle length and spline count? Each axle is 15 5/8" with a 33-tooth spline (1.062" OD, 2 3/8" spline length).
• Why does the CV joint float on these axles? The extended spline removes the inboard shoulder so the CV joint can slide freely, accommodating changes in track width as the suspension moves and eliminating cage breakage caused by axle bind.
• What is included? The set includes a pair of VW IRS axles and Spirol Lock circlips to secure the CV joints.

Installation

• CV Joint Float: Ensure your CV boots are high-quality and flexible (such as silicone or heavy-duty rubber). Because the CV joint floats on these axles, the boot must be able to stretch and compress more than a standard setup.
• Snap Ring Usage: Use the correct snap rings to retain the CV joint on the shaft. Even though the joint floats, it must remain within the functional range of the splines.
• Grease: Use high-moly CV grease. The extended movement of the joint on the spline requires consistent lubrication to prevent wear on the axle's splines.

Explore Related Categories

Axles VW Beetle VW Super Beetle