This transmission seal sits at the shaft exit point of the gearbox housing, retaining lubricating oil inside the case while excluding dirt and moisture from the external environment. It is an original-manufacturer component, meaning its lip profile and interference fit match the housing bore and shaft surface as designed for the parent transmission assembly. A worn or hardened seal allows oil to weep past the shaft, which can lead to low lubricant levels and accelerated gear or bearing wear. On installation, ensure the seal is pressed squarely into the bore without damaging the lip, and that the shaft surface is free of burrs or grooves.