The NOS 4R75 Automatic Transmission Extension Housing Seal 15966 4764 is a high-quality seal designed for use in automatic transmissions. Manufactured by NATIONAL FEDERAL-MUGOL, this seal is interchangeable with part numbers 4764, 15966, and S-4764, ensuring a perfect fit for your vehicle. With OE/OEM part number 4764, this seal is a durable and reliable component for your transmission, providing a leak-free seal to ensure optimal performance.