QC Pinion Seal 5/16

The QC Pinion Seal 5/16 from Allstar Performance is a precision-engineered differential seal designed for high-performance automotive and tactical vehicle maintenance. This critical component prevents gear oil leakage at the pinion shaft, maintaining hydraulic integrity under demanding operational conditions. Built for those who depend on vehicle reliability in field operations, law enforcement, and military applications, the pinion seal ensures your drivetrain stays sealed against contamination and fluid loss during extended missions or training exercises.

The 5/16-inch diameter seal is engineered to fit standard Quick Change (QC) pinion configurations, providing a dynamic barrier between the differential housing and external environment. Constructed from durable elastomer materials with precision metal reinforcement, this seal withstands pressure cycling, temperature fluctuations, and the vibration inherent to rough terrain operations. The compact design—measuring 4 x 0.55 x 7 inches and weighing just 0.09 lbs—ensures minimal installation complexity while delivering maximum sealing effectiveness across a wide range of differential designs and aftermarket performance applications.

Maintenance professionals, armored vehicle operators, and performance mechanics benefit from the QC Pinion Seal 5/16 when servicing differentials on duty vehicles, patrol trucks, and specialty tactical platforms. Installation requires basic differential knowledge and standard tools, making it accessible to both shop technicians and experienced field personnel. Verify fitment with your specific differential model before ordering—this seal is compatible with Allstar Performance quick-change differential systems and OEM differentials using 5/16-inch pinion shaft specifications. Regular replacement during scheduled maintenance intervals prevents costly fluid leaks that compromise vehicle performance and increase operational downtime.