Power Train Components PT8181NA Differential Pinion Seal

The Power Train Components PT8181NA is a precision-engineered differential pinion seal designed to prevent fluid leaks at the pinion shaft in rear axle assemblies. This seal provides reliable protection against oil loss while keeping contaminants out of the differential housing, ensuring optimal lubrication and extended component life.

Key Features:

• High-quality nitrile rubber construction for superior sealing performance
• Precision-machined sealing edge ensures consistent contact and leak prevention
• Spring-loaded design maintains proper sealing pressure throughout service life
• Temperature range: -40°F to 225°F (-40°C to 107°C)
• Engineered to meet or exceed OE specifications
• Direct replacement for National 8181NA

This differential pinion seal is commonly used in Ford vehicles with 6.75", 7.25", 7.5", 7.75", and 8.0" ring gear differentials. The seal features a lay-down sealing lip design that provides lasting performance even with extreme temperature exposure, shaft imperfections, or shaft bore misalignment. Proper installation of this seal helps maintain differential fluid pressure, prevents contamination, and protects bearings and gears from premature wear.

OEM Cross-References: C2OW4676B, C2OW4676C, C2OZ4676A, C2OZ4676B, C6OW4676, D00W4676B, D6EW4676A1A, D6FZ4676A