Axle Clip, Spiral Lock for 934 CV, 4 Pack

OVERVIEW

When you are pushing the limits of your off-road machine, the last thing you want to worry about is an axle popping out of the CV joint in the middle of a high-speed run or a technical climb. The EMPI Axle Clip Spiral Lock for 934 CV joints is the professional builder''s answer to the inherent weaknesses of standard snap rings. Specifically designed for the massive 934 (Series 30) CV joints commonly found on high-performance sand rails, heavy-duty Baja Bugs, and custom Class 1 racers, these spiral locks provide 360 degrees of retention. Unlike traditional C-clips that can be jarred loose under extreme suspension cycling or high-torque loads, the spiral design "winds" into the axle groove, ensuring that the CV joint remains securely located on the splines regardless of the abuse you throw at the drivetrain. This 4-pack provides enough hardware to fully outfit a complete rear axle set, covering both the inner and outer positions on both the left and right sides of your vehicle.

Precision-engineered from high-tensile spring steel, these spiral locks are a critical component for any long-travel suspension setup where axle angles are aggressive. In the world of air-cooled performance, we know that 934 CVs are the gold standard for strength, but they are only as reliable as the hardware holding them together. Standard snap rings often have "ears" that can be caught or compressed, but the low-profile, wound design of these spiral locks eliminates that failure point entirely. Whether you are building a fresh set of Chromoly axles or performing routine maintenance on your off-road beast, upgrading to EMPI spiral locks is a cheap insurance policy against catastrophic drivetrain failure. Don''t let a five-cent part ruin a five-thousand-dollar weekend; trust the components that the pros use to keep their power on the ground and their axles in the hub.

FITMENT

These spiral locks are designed for high-performance applications and are compatible with the following vehicle types and components:

• CV Joint Style: Fits all standard 934 (Series 30) CV joints.
• Axle Type: Compatible with 33-spline performance axles designed for 934 joints.
• Sand Rails & Dune Buggies: Ideal for high-horsepower long-travel cars.
• Baja Bugs: For custom builds utilizing 934 transaxle flanges and trailing arms.
• Off-Road Race Cars: Fits Class 1, Class 5 Unlimited, and Class 10 race vehicles.
• Custom VW Conversions: Any air-cooled Volkswagen running upgraded 934 drivetrain components.

SPECS

• Product Type: Axle Retaining Spiral Lock.
• Quantity: 4 Pack (Complete vehicle set).
• Material: Heavy-duty high-carbon spring steel.
• Finish: Natural oil-quenched for corrosion resistance.
• Design: 360-degree wound spiral (no-ear design).
• Part Number: 16-2261-0.
• Manufacturer: EMPI.
• Application: 934 CV Joints (approx. 128mm OD).

PRO TIPS

1. Master the "Walking" Installation Technique

Installing spiral locks can be intimidating if you have never done it before, as they do not use standard snap-ring pliers. To install these correctly without over-stressing the metal, start one end of the lock into the axle groove and "walk" the rest of the ring around the circumference using a small flat-head screwdriver or a specialized spiral-lock tool. Avoid over-stretching the ring to pull it over the axle diameter; you want to maintain the tension of the steel so it snaps firmly into the groove. If the ring feels loose after installation, it has been over-extended and should be replaced with a fresh one to ensure maximum retention.

2. Always Inspect the Axle Groove Depth

Before installing your new EMPI spiral locks, take a moment to clean the axle grooves thoroughly with brake cleaner and a wire brush. Grease buildup can hide a groove that is worn or improperly machined. For high-performance Chromoly axles, ensure the groove is deep enough for the spiral lock to sit nearly flush or slightly sub-flush. If the spiral lock is sitting too high, it may interfere with the inner race of the 934 CV joint, leading to heat buildup or premature wear. A properly seated spiral lock should be difficult to rotate by hand once it is snapped into place.

3. Never Reuse Old Spiral Locks

It is a golden rule in the Appletree shop: if you take a spiral lock off, it goes in the trash. These clips are designed to hold a specific amount of tension against the axle groove. The process of removing themusually by prying the end up and winding them offdestretches the spring steel and fatigues the metal. Reusing an old lock significantly increases the risk of the CV joint migrating on the axle, which can lead to stripped splines or a thrown axle. Since this is a 4-pack, you have exactly what you need for a full service; always start your CV boot or joint replacement with brand-new hardware for peace of mind on the trail.