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Servo Piston Kits
Servo Piston KitO-Ring Style
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.
- Piston
- O-Rings (2)
- 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
Part TypeAutomatic Transmission Servo Piston
BrandSONNAX
Package Height2.4
Package Width4.3
Package Length4.8
Weight0.36 PG
Part CategoryReplacement Parts
Part FitmentSemi Universal
Vendor Part Number28821-01K
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
