The 3604 National Bearing Differential Pinion Seal is a vintage part designed for car and truck transmissions. Manufactured in Mexico, this seal is specifically made by National and comes with a 1-month manufacturer warranty. With a universal fitment, this seal is a crucial component for maintaining the proper functioning of the differential pinion in your vehicle. This single pack seal is a reliable choice for those looking to replace or upgrade their existing seal for improved performance and longevity.