QC Spool Shim 12pc Kit

The QC Spool Shim 12pc Kit by PEM is an essential precision component designed for mechanics and enthusiasts performing differential and drivetrain modifications. Spool shims are critical when converting a standard open differential to a spool or locker setup, or when fine-tuning load distribution and clearances in high-performance differentials. This 12-piece assortment provides the variety needed to dial in proper axle preload and lateral runout, ensuring smooth operation and longevity in both street and track applications.

PEM's QC Spool Shim kit consists of washers engineered to tight tolerances, allowing mechanics to adjust spool or locker seating depth and axle shaft preload with accuracy. Each shim in the 12-piece set is sized to stack and combine, enabling cumulative adjustments that eliminate unwanted play while preventing binding. The compact dimensions (4.05 x 0.1 x 6 inches) and light weight (0.09 lbs) reflect the quality construction typical of shim kits, designed to withstand the forces of aggressive acceleration and cornering.

This kit benefits differential technicians, transmission shops, and serious DIY builders tackling limited-slip or locking differential installations on Chevrolet, Ford, Dodge, and import vehicles. The precise adjustments made possible by this shim kit directly impact driveline reliability and handling balance, making it an invaluable tool for performance enthusiasts.