Rear Suspension Parts for 1967 VW Bug: A Complete Guide

The 1967 Volkswagen Beetle, a classic icon of American motoring, relies on a unique rear suspension design that differs significantly from modern cars. Understanding the rear suspension parts for a 1967 VW Bug is essential for restoration, maintenance, or performance upgrades. This guide covers each component, its function, common issues, and what to look for when purchasing replacements.

The 1967 VW Bug Rear Suspension System

The 1967 Beetle uses a swing axle rear suspension with torsion bars. Unlike coil springs or leaf springs, the torsion bar system uses a long steel bar that twists to absorb road impacts. The suspension consists of several key parts that work together to provide ride comfort and handling.

Key Components

Trailing Arms

Trailing arms connect the rear wheel hub to the chassis. On a 1967 Bug, these are forged steel arms that pivot at the axle tube. They hold the wheel and brake assembly. Over time, trailing arm bushings wear out, causing play and imprecise handling. When replacing, look for heavy-duty aftermarket arms (e.g., cast aluminum or reinforced steel) if you plan to upgrade performance. Stock replacements should match OEM specs.

Torsion Bars

The torsion bar is the springing medium. It runs inside the axle tube and splines into the trailing arm and the torsion housing. The 1967 Bug uses 22 mm diameter bars (some early models used 21 mm). Upgrading to 22 mm or even 24 mm bars stiffens the ride and reduces body roll. When buying, ensure correct spline count (usually 36 inner and 40 outer) for 1967 models.

Torsion Bar Adjusters (Spring Plates)

Spring plates (also called torsion bar end plates) attach to the outer end of the torsion bar and to the trailing arm. They allow adjustment of ride height via indexing. The 1967 uses a specific design with a small adjuster bolt. Aftermarket plates often have multiple adjustment holes for easy lowering. Beware of stripped or cracked plates; replace if worn.

Shock Absorbers

The rear shocks dampen the oscillation of the torsion bars. The 1967 Bug uses two shocks mounted at the rear. Stock shocks are hydraulic, but gas-charged or adjustable shocks greatly improve ride and control. For a stock restoration, use OEM-style shocks (e.g., Boge or Sachs). For handling, consider KYB Gas-A-Just or Bilstein.

Axle Nut and Bearings

The rear axle is held by a large nut and tapered roller bearings. The 1967 Bug uses 36 mm or 45 mm axle nuts depending on production date. Axle bearings are a common wear item. Replace with high-quality bearings (e.g., Timken or FAG). Always replace the axle nut and washer when servicing.

Rear Sway Bar (Anti-Roll Bar)

Not all 1967 Bugs came with a rear sway bar, but aftermarket ones are available. A rear sway bar reduces body roll and improves cornering. It attaches to the trailing arms and the torsion housing. If you’re upgrading handling, this is a worthwhile addition.

Rear Suspension Bushings

Several bushings cushion the suspension: trailing arm bushings, sway bar bushings, shock absorber bushings. Polyurethane bushings are popular for better feel and durability, but they transmit more vibration. Rubber bushings are quieter and closer to stock. Choose based on your priority.

Common Issues and Replacement Tips

• Sagging ride height: Often due to worn torsion bars or incorrect indexing. Measure ride height from the center of wheel to fender lip (stock is about 5-6 inches). Adjust spring plates to restore.
• Clunking noises: Worn trailing arm bushings or loose shock mounts. Inspect all pivot points.
• Uneven tire wear: Could be from bent trailing arm or misaligned suspension. Check for straightness.
• Leaking shocks: Replace in pairs.

When buying parts, check for correct year compatibility. The 1967 is a transition year; some parts differ from 1966 and 1968. Always verify with a reputable supplier.

OEM vs. Aftermarket: Which to Choose?

For Concours restoration, use OEM (original equipment manufacturer) parts like VW Classic Parts or German-made brands. For daily driving or performance, aftermarket parts often offer better durability and adjustability. Brands like EMPI, CB Performance, and Vintage Speed offer quality upgrades. Avoid cheap knockoffs that fail quickly.

Tools Needed for Installation

Changing rear suspension parts on a 1967 Bug requires a few specialty tools: torsion bar spline tool, spring plate pliers, large axle nut socket (36mm or 45mm), and a torque wrench. Safety stands are a must. Many owners prefer to have a shop do the work due to the spring tension involved.

Final Recommendation

Start by inspecting the current condition of your rear suspension. Replace worn bushings and shocks first—they offer the biggest ride improvement. If you want better handling, upgrade to 22mm torsion bars and a rear sway bar. Use quality polyurethane bushings and adjustable spring plates for fine-tuning ride height. For stock restorations, stick with OEM replacement parts. Always buy from a trusted supplier that specializes in vintage VW parts. With proper maintenance, your 1967 VW Bug’s rear suspension will provide many more miles of enjoyment.

Remember: safety first. If you are not confident in your mechanical skills, consult a professional mechanic experienced with air-cooled Volkswagens.