020 311 113B – Radial Shaft Seal (23.9 X 40 X 8 mm)

Description

The 020 311 113 B radial shaft seal is a precision-engineered component designed to protect the input shaft of the Volkswagen 020 manual transmission. With exact dimensions of 23.9mm x 40mm x 8mm, this seal fits securely within the transmission housing to prevent pressurized gear oil from escaping into the clutch housing.

Maintaining a dry environment for your clutch assembly is critical. If gear oil seeps past this seal, it can contaminate the clutch disc, leading to slipping, chattering, and eventual failure of the drivetrain. This high-quality replacement restores the factory sealing performance required for both standard and performance VR6 or TDI conversions using the 020 gearbox.

Why the 020 311 113 B Radial Shaft Seal Matters

The 020 311 113 B radial shaft seal is the primary barrier between the transmission’s internal lubrication and the sensitive friction materials of the clutch. In manual transmissions, the input shaft is constantly rotating; this creates centrifugal force and heat that can degrade inferior rubber seals.

Signs Your Radial Shaft Seal Needs Replacing

Identify transmission input leaks early by monitoring for these transmission and clutch symptoms:

• Oil seeping from the inspection hole at the bottom of the bell housing.

• Clutch slipping under load, even when the friction disc has adequate life.

• Difficulty shifting gears or “notchy” engagement due to low gear oil levels.

• Persistent smell of gear oil (often described as sulfur-like) near the transmission.

• Dark, oily residue visible on the clutch pressure plate during a transmission removal.

A failing input shaft seal is often discovered during a clutch replacement. It is considered a best practice to replace this seal whenever the transmission is separated from the engine block.

Key Features

• OE Part Number: 020 311 113 B

• Dimensions: 23.9mm Inner Diameter x 40mm Outer Diameter x 8mm Width.

• Durable Construction: Made from heat-resistant elastomers to ensure a warp-free seal.

• Universal Compatibility: Fits a wide range of 020 5-speed manual transmissions.

• Protection: Prevents gear oil from contaminating the clutch friction surface.

• Precision Engineered: Manufactured to strict OE tolerances for a direct, press-fit installation.

Service Notes

Always verify fitment by VIN before ordering. When replacing the 020 311 113 B radial shaft seal, inspect the input shaft for any burrs or scoring. Any roughness on the shaft can tear the lip of the new seal during installation. Use a dedicated seal driver or a socket of matching diameter to press the seal into the housing evenly.

Applying a light coat of clean gear oil to the inner lip of the seal before sliding it over the shaft will prevent “dry start” wear and ensure immediate sealing upon rotation.

Compatibility & Applications

Always verify fitment by VIN before ordering.

Cross Reference Numbers

• 020 311 113 B

• 020311113B

• 020-311-113-B

• Corteco 12016924B

• Vaico V10-3337

• CTO-12016924B

Additional information