Smart-Tech® 10-Clutch Drum Kit
- Smart-Tech 10-Clutch Drum
- Smart-Tech 10-Clutch Piston
- 10-Clutch Hub
- Thrust Bearing
- Bushing PTFE Coated, Installed
- High Clutch Return Springs (24)
- Clutch Drum Spring Retainer
- Retaining Ring Small
- Inner & Outer Lip Seals Not Shown
- Shim Narrow
- Shim Wide
Smart-Tech 10-clutch drum kit 28756-25K features Sonnax's oversized piston with 35% more apply area than OE drums or Sonnax regular 10-clutch drum kits. The 35% larger piston increases both the engaging capacity and holding capacity of the 10-clutch system. Alternatively, it is possible to reduce line pressure or to use just seven frictions and have the same holding capacity as a regular 10-clutch drum, but with increased heat dissipation from thicker steels.
Sonnax 10-clutch drum kits are optimized for Powerglide performance applications. Using the patented Sonnax 10-clutch drum system, the drum and piston accept 10 frictions and 10 Kolene® steels, increasing lockup surface to allow significantly more torque than modified OE drums. The drum features a piston bore that is .060" deeper for greater piston travel than was available from Sonnax 10-clutch drum kit 28755-08K (discontinued).
- 35% More apply area
- Use with your choice of frictions and steels
- Excess material removed from high-strength, cast steel drum to reduce rotating mass
- 6061 Forged aluminum piston will not crack at high operating pressure like cast pistons
- Forged chromoly steel clutch hub
- Patent No. 6,920,970
- Patent No. 7,204,357
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