This CORTECO crankshaft seal, part number 12000623B, is specifically engineered for manual transmission applications. It plays a crucial role in preventing lubricant from escaping the engine and contaminants from entering the transmission. Crafted with durable materials, this seal is built to withstand the demanding conditions within the powertrain. Its precise design ensures a tight fit, contributing to the longevity and reliability of your vehicle's transmission system. Proper sealing is essential for maintaining the integrity of your transmission fluid and protecting internal components from damage. Replacing a worn or damaged crankshaft seal with this CORTECO part can help prevent costly repairs and ensure smooth operation.