This oil seal fits into the joint housing on the front axle, where it retains lubricant and prevents contamination from entering the universal-joint assembly. It sits at the interface between the rotating joint and the stationary housing, maintaining a sealed boundary that protects the bearing surfaces. A worn seal allows grease loss and dirt ingress, which leads to joint wear and eventual driveline noise. Corteco manufactures this seal to the same cross-section and lip geometry as the original, so it seats correctly in the housing groove without modification. On installation, ensure the sealing lip faces the lubricant side and that the housing bore is clean and free of burrs.