The CORTECO Crankshaft Seal, part number 12001878B, is specifically manufactured for the differential assembly. Its primary function is to create a tight seal, preventing the leakage of lubricants and protecting vital components from contamination. Crafted with high-quality materials, this seal is built to withstand the demanding conditions of automotive operation. It ensures long-lasting performance and maintains the integrity of the differential system. Proper sealing is crucial for the longevity and efficiency of your vehicle's drivetrain. This CORTECO seal provides a dependable solution for maintaining optimal fluid levels and preventing potential damage.