Servo Piston
Part No. 28821-02

Dual-seal design, Use with PTFE or metal seals

OE Part No. 3846173

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Sonnax servo piston 28821-02 for GM Powerglide units features a dual-seal design and can be used with one or two PTFE or OEM-style cast seals.

  • High-strength billet aluminum piston
  • Piston features a rounded profile for better stress distribution
  • Powerglide Servo Piston 28821-02