This CORTECO crankshaft seal is specifically designed for automatic transmissions. Its primary function is to prevent oil from leaking out of the engine's crankshaft area and to keep contaminants from entering the transmission. A properly functioning crankshaft seal is crucial for the longevity and efficiency of your automatic transmission. Leaks can lead to low fluid levels, overheating, and potential transmission damage. This seal is engineered to meet stringent quality standards for reliable performance. Crafted from durable materials, this seal is built to withstand the demanding conditions within the engine bay. It provides a robust barrier against high temperatures and the corrosive effects of engine fluids, ensuring a long service life.