Sonnax New Parts Bulletin - Powerglide Super Hold Servo Assembly

Sonnax Parts 4 Automatics

New Powerglide Super Hold Servo Assembly

Super Hold Servo Assembly
Part #28821-09K

Features & Benefits

  • 30% More apply area
  • Allows line pressure to be reduced, freeing up horsepower
  • Ensures full release of band
  • Dual seals for piston to case bore
  • Pin to case TeflonĀ® seal
  • Fits into the same space as a standard servo assembly
  • Tunable

This new super hold servo assembly features a dual piston design for 30% more apply area than the original servo. The larger apply area will increase band apply force at your current line pressure or allow you to reduce line pressure by 20% to 30% while maintaining the same apply force. Improved sealing throughout reduces fluid loss and is optimized for low friction movement. The return spring in the Sonnax servo is tunable to ensure full servo release even at higher line pressures.

pdfPart Summary
pdf Instructions

Super Hold Servo Assembly

Related Parts

Servo Apply Line
Part #28117

Servo Apply Line

Band Adjustment Screw Kit
Part #28612-01K

Band Adjustment Screw Kit Part #28612-01K

Extra Wide Band
Part #S019961

Extra Wide Band


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