If your Dana 300 transfer case requires service, this component may need replacement. The PORC Off Road Products transfer case input shaft oil seal is designed as a direct replacement for 1980–1986 Jeep CJ5, CJ7, and CJ8 models equipped with Dana 300 transfer cases. This component installs at the input shaft location and is constructed to match factory fitment and dimensions. Manufactured to align with OE specifications, it provides consistent fitment and proper installation during service or rebuild. Measures approximately 2.69 inch outer diameter, 1.93 inch inner diameter, and 0.31 inch width. Replaces OE reference 8131684 and interchange part number 18674.19.