Ball Joint Upper Trailing Arm Seal, for Beetle & Ghia 66-77

OVERVIEW

Maintaining the integrity of your air-cooled Volkswagen''s front suspension is critical for both safety and ride quality, and it often starts with the smallest components. This Ball Joint Upper Trailing Arm Seal is an essential barrier designed to protect your front beam''s internal needle bearings and bushings from the harsh environment of the open road. Over decades of service, original factory seals become brittle, crack, and eventually disintegrate, allowing road grime, moisture, and abrasive grit to migrate into the torsion tubes. Once contaminants enter the beam, they act like sandpaper against your trailing arm surfaces and bearings, leading to premature wear, "clunky" front-end noise, and expensive structural damage. By replacing your worn-out stock torsion seals with these high-quality OEM-style replacements, you are ensuring that your grease stays where it belongsinside the beamand that the elements stay out.

At Appletree Automotive, we understand that a proper restoration or maintenance job requires parts that fit right the first time. This seal is specifically engineered for the upper trailing arms of the 1966 through 1977 ball joint front ends found on Standard Beetles and Karmann Ghias. These seals sit snugly between the trailing arm and the beam cross tube, providing a flexible yet resilient interface that moves with your suspension. Whether you are performing a complete front-end rebuild or just doing a seasonal grease job and noticed a leak, these seals are a non-negotiable requirement for any serious VW enthusiast. Don''t let a three-dollar part lead to a thousand-dollar beam failure; refreshing these seals is one of the most cost-effective ways to preserve the smooth, iconic handling of your vintage Type 1 or Ghia.

FITMENT

• Volkswagen Standard Beetle: 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977
• Volkswagen Karmann Ghia: 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1974
• Note: Fits Ball Joint front ends only. Does not fit King Pin (pre-66) or Super Beetle (Strut) models.

SPECS

• OEM Part Number: 131-405-131
• Other Part Number: 98-4045-B
• Material: High-density, oil-resistant automotive-grade rubber
• Placement: Upper Trailing Arm (Upper position on the front beam)
• Quantity: Sold Each (2 required per vehicle for the upper arms)
• Compatibility: Designed for stock and adjustable ball joint beams
• Color: Black

PRO TIPS

1. Clean the Seating Surfaces Thoroughly

Before installing the new seal, it is imperative to use a degreaser and a wire brush to clean the shoulder of the trailing arm and the outer face of the beam tube. Any leftover old rubber, rust, or hardened grease will prevent the new seal from seating flush. A clean surface ensures a vacuum-tight fit that effectively keeps water from siphoning into the beam during rain or car washes. If the metal surface is pitted, a very thin smear of RTV silicone on the beam side can help provide an extra level of protection, though usually, a clean dry fit is best for the arm side to allow for rotation.

2. The "Pre-Lube" Technique

When sliding the trailing arm back into the beam through the new seal, it is easy to accidentally tear or "fold over" the lip of the rubber. To prevent this, apply a light coat of high-quality chassis grease to the inner diameter of the seal and the trailing arm shaft. This reduces friction during the installation process and ensures the seal lips sit correctly against the arm. This also provides an initial lubrication layer that prevents the rubber from "chattering" or squeaking against the metal during the first few miles of driving after the rebuild.

3. Check Your Bearings While You Are There

Since you must remove the trailing arm to replace this seal, this is the perfect time to inspect your needle bearings or bushings inside the beam tubes. Reach inside with a clean finger or a light to check for metal flakes or heavy scoring. If the old seal was missing or badly damaged, it is likely that dirt has already entered the beam. We recommend pumping fresh grease into the Zerk fittings until you see the old, dirty grease being pushed out, ensuring the entire cavity is filled with clean lubricant before you final-seat the new seal and tighten the grub screws.