This seal ring fits inside the clutch basket assembly, where it prevents hydraulic fluid or lubricant from leaking past the rotating hub. It sits in a machined groove on the basket, maintaining a static seal between the basket and the shaft. A worn or hardened ring allows fluid bypass, which reduces clutch pack engagement pressure and can cause slipping or delayed engagement. This original part is formed to the same cross-section and groove fit as the factory-installed component, so it seats without additional shimming or modification. On reinstall, ensure the groove is clean and free of burrs before pressing the ring into place.