Servo Piston Kit

Part No.


Servo Piston Kit
  • Servo Piston Kit



Servo Piston Kit

Part No. 28821-02K

  • Piston
  • PTFE Seal Rings (2)
  • Cover Gasket

Sealing Ring Type , includes PTFE Seals & Cover Gasket

Sonnax servo piston kit 28821-02K for GM Powerglide units features dual 18608T PTFE seal rings. These rings are configured to be interchangeable with the OE cast aluminum seal ring for maximum flexibility. The piston can be assembled using only one seal ring for lower friction, two aluminum seal rings or any combination in between. Sonnax also offers servo piston kit 28821-01K with dual O-rings 28821-OR for use with worn cases.

  • High-strength aluminum piston
  • Piston features a rounded profile for better stress distribution
  • Dual PTFE seal rings for better seal and low friction
  • Includes cover gasket

Related Parts

Click here to view PDF if instructions do not appear below.

It appears you don't have a PDF plugin for this browser. Click here to view the PDF file.

Contact a Sonnax Distributor to purchase this part.