This front axle oil seal retains lubricant within the axle housing and prevents ingress of dirt and moisture. It sits at the wheel-end or differential output, where the rotating shaft passes through the stationary housing. A worn seal allows lubricant to leak past the shaft, leading to reduced gear and bearing life from contamination or fluid loss. Corteco manufactures this seal to match the original housing bore and shaft surface finish, so the sealing lip maintains proper contact pressure without requiring additional shimming or adapter sleeves. On installation, ensure the seal bore and shaft are clean and free of burrs, and press the seal squarely into the housing to avoid lip distortion.