Irs Pivot Pocket Jig Tool, for Converting Swing To IRS

OVERVIEW

Upgrading your vintage Volkswagen from a swing axle setup to an Independent Rear Suspension (IRS) is one of the most transformative modifications you can perform for handling, ride quality, and off-road performance. While the swing axle design is iconic, its inherent camber changes during suspension travel can lead to unpredictable handling and limited wheel travel. By converting to IRS, you unlock the ability to run longer trailing arms and maintain a more consistent tire contact patch. However, the success of this conversion hinges entirely on the precise placement of the inner pivot pockets. The Latest Rage IRS Pivot Pocket Jig Tool is the definitive solution for fabricators and DIY enthusiasts who demand perfection. This tool eliminates the "eyeball" method, providing a rock-solid, bolt-on reference point that ensures your rear suspension geometry is symmetrical and accurate to factory specifications.

Precision is paramount when welding on a torsion housing, as even a fraction of an inch of misalignment can result in a car that "dog-tracks" down the highway or suffers from accelerated tire wear and poor cornering. This jig is engineered from heavy-gauge steel to withstand the heat of the welding process without warping, maintaining its integrity so you can achieve professional-grade results in your own garage. It bolts directly to the spring plate mounting surface on your existing torsion housing, positioning the pivot pockets in the exact location required for proper trailing arm articulation. Whether you are building a high-performance street Beetle, a rugged Baja Bug, or a dedicated sand rail, this jig is an essential investment that prevents costly mistakes and ensures your air-cooled project handles exactly the way it was meant to. Don''t settle for "close enough" when it comes to your chassis; use the tool that the pros trust to get the job done right the first time.

FITMENT

• VW Beetle: All years (when converting from swing axle to IRS)
• VW Karmann Ghia: 1956-1974
• VW Type 3: Notchback, Squareback, and Fastback models
• VW Thing (Type 181): All years
• Dune Buggies: Manx-style bodies and custom tube chassis utilizing VW torsion housings
• Sand Rails: Ideal for custom builds requiring precise IRS pivot placement

SPECS

• Part Number: AC000155
• Material: High-strength, heavy-duty plate steel construction
• Application: Swing axle to Independent Rear Suspension (IRS) conversion
• Finish: Raw steel (allows for easy grounding and welding proximity)
• Weight: Approximately 10.55 lbs
• Design: Dual-plate system for simultaneous alignment of left and right pivot points
• Compatibility: Designed for use with standard 2-inch and 2-1/4 inch torsion housings
• Precision: Laser-cut components for maximum accuracy and repeatability

PRO TIPS

Pro Tip 1: Surface Preparation is Critical. Before you even think about bolting this jig to your torsion housing, you must strip the housing down to bare, shiny metal in the areas where the pivot pockets will be welded. Any leftover paint, undercoating, or rust will not only contaminate your weld but can also create a slight offset in how the jig sits against the housing. Use a flap disc or wire wheel to ensure a clean surface. Once the jig is bolted down, double-check that there is no debris trapped between the jig plates and the torsion housing flanges, as even a piece of grit can throw your camber off by several degrees.

Pro Tip 2: Manage Your Heat to Prevent Warpage. When you are ready to weld the pivot pockets into place, avoid the temptation to lay down one long, continuous bead. The intense heat from a long weld can cause the torsion housing or the pivot pocket itself to pull or warp, even with the jig in place. Instead, start with four heavy tack welds on each pocket. Once the tacks have cooled slightly, move in a "star pattern," welding in short one-inch increments and jumping from the left side of the car to the right side. This allows the heat to dissipate evenly across the chassis, ensuring that once you remove the jig, the pockets stay exactly where they were intended to be.

Pro Tip 3: Verify with a Mock-Up. After the pockets are tacked firmly but before you finish the final heavy welding, it is a great practice to temporarily install your trailing arms and pivot bolts. Rotate the trailing arms through their full range of motion to ensure there is no binding and that the arms are centered in the pockets. This "sanity check" ensures that your torsion housing hasn''t shifted and that your specific trailing arms (whether stock or aftermarket) have the necessary clearance. Once you have confirmed the movement is smooth and the alignment looks perfect, remove the arms and finish your final beads with the jig still bolted in place for maximum support.