This CORTECO crankshaft seal, part number 12011307B, is specifically engineered for manual transmission applications. It plays a crucial role in preventing oil from leaking out of the engine's crankshaft area and entering the transmission. A properly functioning crankshaft seal is essential for maintaining the correct oil levels within the engine and transmission, which in turn ensures the longevity and optimal performance of both components. This seal is manufactured to meet stringent quality standards, providing reliable and durable sealing. Installation of this seal should be performed by a qualified technician to ensure proper fitment and function. Regular inspection of seals can help prevent potential damage caused by oil leaks.