National 222558 Manual Transmission Input Shaft Seal

Overview of National 222558 Manual Transmission Input Shaft Seal

The National 222558 manual transmission input shaft seal is engineered to provide reliable sealing performance for select Saab and Subaru models. Constructed from durable nitrile material, this oil seal is designed to maintain transmission integrity by preventing fluid leaks and contamination.

• Material: High-quality nitrile for resistance to oil and wear
• Inside Diameter: 0.984 inch (25.000 mm)
• Outside Diameter: 1.740 inch (44.200 mm)
• Thickness/Width: 0.276 inch (7.000 mm)
• Compatible with manual transmission input shafts with 0.984 inch diameter

Technical Specifications and Design Details

The National 222558 input shaft seal belongs to the 220000 series and is specifically designed as a type 32 oil seal. Its precise dimensions include an inside diameter of 0.984 inches (25 mm) and an outside diameter of 1.740 inches (44.2 mm), with a thickness of 0.276 inches (7 mm). The seal fits housing bores measuring approximately 1.732 inches (44 mm), ensuring a secure and effective fit within the transmission assembly. The nitrile material offers excellent resistance to heat, oil, and mechanical wear, making it suitable for the demanding environment inside manual transmissions.

Compatible Vehicles and Applications

This manual transmission input shaft seal is compatible with a range of Saab and Subaru vehicles, including:

• Saab 9-2X
• Subaru Baja
• Subaru Crosstrek and XV Crosstrek
• Subaru Forester
• Subaru Impreza
• Subaru Legacy
• Subaru Outback
• Subaru Standard
• Subaru WRX and WRX STI

It is designed to replace worn or damaged seals in these models’ manual transmissions, helping maintain proper lubrication and prevent leaks.

Common Issues Addressed by the National 222558 Seal

• Prevents manual transmission fluid leaks around the input shaft
• Reduces contamination ingress that can cause premature wear
• Maintains proper sealing pressure within the transmission housing
• Helps avoid transmission overheating due to fluid loss
• Minimizes shaft wear by maintaining lubrication integrity

Installation Notes and Tips

• Ensure the transmission input shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal orientation matches the original part to ensure proper sealing
• Inspect the shaft for wear or damage prior to installing the new seal
• Apply a light coating of transmission fluid or compatible lubricant to the seal lip before installation

Quality Assurance and Warranty

National manufactures the 222558 input shaft seal to meet industry standards for durability and performance. The nitrile material and precise manufacturing tolerances contribute to consistent sealing reliability. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s quality.