National 222820 Automatic Transmission Pinion Seal - Front

Overview of National 222820 Automatic Transmission Pinion Seal

The National 222820 automatic transmission pinion seal is engineered to provide reliable sealing performance for a variety of vehicle makes and models. Designed with durable nitrile material, this oil seal helps maintain transmission integrity by preventing fluid leaks and contamination.

• Inside diameter: 1.102 inches (28.000 mm)
• Outside diameter: 1.588 inches (40.340 mm)
• Thickness/width: 0.276 inches (7.000 mm)
• Sealing material: Nitrile for enhanced resistance to oil and heat
• Compatible with multiple vehicle makes including Audi, BMW, Ford, Nissan, Porsche, Toyota, and Volkswagen

Technical Specifications and Material Details

This automatic transmission pinion seal from National is constructed from nitrile, a synthetic rubber known for its excellent resistance to petroleum-based fluids and high temperatures. The seal features a precise inside diameter of 1.102 inches (28 mm) and an outside diameter of 1.588 inches (40.34 mm), ensuring a secure fit within the housing bore of 1.575 inches (40 mm). With a thickness of 0.276 inches (7 mm), the seal maintains optimal contact pressure to prevent leaks while accommodating shaft movement.

Compatible Vehicles and Applications

The National 222820 pinion seal is compatible with a wide range of vehicles, including but not limited to:

• Audi models 80, 90, 100, 200
• BMW models 525i, 530i, 535i, M5, M6
• Ford Mustang and Power Ram 50
• Nissan D50 and Pickup
• Porsche Boxster and Cayman
• Toyota Camry, Celica, Corolla
• Volkswagen 240, 310

This part is suitable for use in automatic transmissions requiring a 33-type oil seal with the specified dimensions.

Common Issues Addressed by the National 222820 Seal

• Prevents automatic transmission fluid leaks around the pinion shaft
• Reduces contamination ingress that can cause premature transmission wear
• Maintains proper lubrication pressure within the transmission system
• Helps avoid costly transmission repairs due to seal failure
• Ensures consistent performance in vehicles with high mileage or heavy use

Installation Notes and Tips

When installing the National 222820 pinion seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the seal orientation matches the original part to maintain proper sealing function. It is recommended to inspect related transmission components during installation for wear or damage.

Quality Assurance and Warranty Information

Manufactured by National, a recognized brand in transmission sealing systems, the 222820 pinion seal meets industry standards for durability and performance. The nitrile material provides reliable resistance to oil and heat exposure. While specific warranty details are not provided, National products typically adhere to strict quality control processes to ensure consistent product reliability.