If your differential is being serviced or internal components are worn, this component may need replacement. The PORC Off Road Products outer pinion oil slinger is designed as a direct replacement for Jeep CJ, YJ, TJ, XJ, KJ, and ZJ models equipped with Dana 30 front differentials and select Dana 44 applications. This component installs on the pinion assembly and works alongside the inner slinger to guide gear oil movement within the differential during operation. Manufactured to align with factory specifications, it provides consistent fitment and reliable performance during differential service or rebuild. Replaces OE reference 636566 and interchange part number 16512.52.