Piston

O-Rings (2)

Gasket

O-Ring Style, Includes O-Rings & Cover Gasket

Drag racing Powerglides® generate higher line pressure than the OE servo-piston metal seal ring was designed to withstand. With pressures over 200 PSI, the end gap of the OE seal leaks, causing a partial-apply condition in low gear that can result in higher drag, heat and wear of the high clutch. The Sonnax No Leak Powerglide® Dual O-Ring Servo Piston 28821-01K uses dual O-ring seals for superior, positive sealing. In applications with a distorted servo piston bore or case flex, O-rings will conform to the bore surface, a feature not possible with metal sealing rings. Another source of leakage is the servo pin thru bore. The Sonnax No Leak Powerglide Dual O-Ring Servo Piston 28821-01K yields a precise, slip fit with the servo pin to further improve performance.

Designed for high pressure drag racing Powerglides®

High quality billet aluminum construction

Rubber O-Rings offer improved sealing over OE metal sealing rings

• Piston...
• O-Rings...
• Gasket O-Ring Style, Includes O-Rings & Cover GasketDrag racing Powerglides® generate higher line pressure than the OE servo-piston metal seal ring was designed to withstand. With pressures over 200 PSI, the end gap of the OE seal leaks, causing a partial-apply condition in low gear that can result in higher drag, heat and wear of the high clutch. The Sonnax No Leak Powerglide® Dual O-Ring Servo Piston 28821-01K uses dual O-ring seals for superior, positive sealing. In...
• Designed for high pressure drag racing...
• High quality billet aluminum...

Piston...Sonnax