Sonnax Contender clutch drum, hub and piston kit 28755-14K for GM Powerglide units includes the three essential components for building a seven- or eight-clutch drum assembly.

The high-quality Sonnax drum is machined with 12 additional lugs to reduce rotating mass, allowing it to be used with 12- or 24-lug steel plates. The piston bore and other features are identical to OE. Expanding the capability of Sonnax direct replacement drum28755, this kit adds a clutch hub and piston configured to accept extra frictions for increased torque and holding power.

• Forged 6061 aluminum piston will not crack at high operating pressure like cast pistons
• Forged chromoly steel clutch hub provides superior strength