National 221607 Manual Transmission Shift Shaft Seal

Overview of National 221607 Manual Transmission Shift Shaft Seal

The National 221607 manual transmission shift shaft seal is designed to provide reliable sealing performance for select Acura and Honda vehicles. Engineered with polyacrylate material, this oil seal helps maintain transmission integrity by preventing fluid leaks around the shift shaft.

• Inside diameter: 0.630 inch (16.000 mm)
• Outside diameter: 1.071 inch (27.200 mm)
• Thickness/width: 0.551 inch (14.000 mm)
• Sealing material: Polyacrylate for durability and resistance
• Compatible with housing bore size: 1.063 inch (27.000 mm)

Detailed Product Description

The National 221607 shift shaft seal is part of the 220000 series, specifically designed for manual transmissions in Acura and Honda models such as the Accord, Civic del Sol, CL, CR-V, Legend, and Prelude. Constructed from polyacrylate, this seal offers effective oil retention and protection against contaminants. Its precise dimensions—0.630 inch inside diameter and 1.071 inch outside diameter—ensure a proper fit on shafts measuring 16 mm, matching the housing bore of 27 mm. The 14 mm thickness provides a robust sealing surface to maintain transmission fluid integrity and prevent leaks that can lead to transmission damage.

Common Applications and Problem Solving

• Prevents manual transmission fluid leaks around the shift shaft
• Reduces risk of contamination entering the transmission system
• Helps maintain smooth shifting performance by preserving lubrication
• Addresses wear-related seal degradation in Acura and Honda manual transmissions
• Replaces worn or damaged seals to restore transmission reliability

Installation Notes and Tips

• Ensure the housing bore and shaft dimensions match the seal specifications before installation
• Clean the shaft and bore area thoroughly to remove debris and old sealant
• Use appropriate tools to press the seal evenly without distortion
• Check for proper alignment to avoid premature wear or leaks
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

National manufactures the 221607 shift shaft seal to meet industry standards for durability and performance. The polyacrylate material is selected for its resistance to heat and transmission fluids, ensuring long service life. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects. For precise warranty information, refer to the product documentation or contact the manufacturer.