Steel Ball Kit 1/2in 5pk

The ALLSTAR PERFORMANCE Steel Ball Kit 1/2in 5pk (ALL 26963) provides OEM-spec replacement steel balls sized for Bert ball spline transmissions. This five-piece set delivers precision-manufactured 1/2-inch diameter hardened steel balls in natural finish, designed to restore proper engagement and shift feel in manual transmissions that rely on ball-spline coupling geometry. Each ball meets the dimensional tolerances required for consistent spline lockup and smooth power transfer through the driveline.

In ball spline transmissions, the rolling elements directly contact the splined shafts and housing to transmit torque while allowing axial movement. Over thousands of shift cycles, original balls wear, develop flat spots, or become damaged, causing notchy shifts, grinding, or loss of lock-up. Replacing the full set of five balls restores the original geometry and eliminates micro-slippage that compounds drive train wear. The hardened steel composition resists deformation under load and provides the surface finish necessary for smooth rolling action against spline grooves.

This kit is essential for drag racing platforms and performance street cars running Bert transmissions, where transmission integrity directly impacts launch stability and elapsed time. Mechanics and transmission rebuilders routinely replace ball sets during overhauls or when diagnosing shift quality issues. The compact package (2.8 × 0.65 × 4.05 inches, 0.1 lbs) fits easily into a toolbox, making this a practical shelf item for shops and serious enthusiasts who perform their own transmission maintenance.