Servos

Powerglide Super Hold Servo Kit | Sonnax

PowerGlide Super Hold Servo Kit by Sonnax Super Hold Servo KitPart No. 28821-09K Sonnax super hold servo kit 28821-09K is an all-in-one upgrade ideal for a competitive edge in GM Powerglide applications where racers are looking to reduce line...

Powerglide Supported Servo Master Kit | Sonnax

PowerGlide Supported Servo Master Kit by Sonnax Part No. 28821-20K Conventional GM Powerglide servos are not well-supported and the return springs do not function properly, both leading causes of band failure. Sonnax supported servo master kit...

Powerglide Servo Piston & Cover Kit | Sonnax | Dual Seal PTFE Ring Style

PowerGlide Servo Piston & Cover Kit (Dual Seal, PTFE Ring Style) by Sonnax Part No. 28821-08K Dual-seal design, PTFE sealing ring style, Non-anodized GM Powerglide transmissions used for drag racing generate higher line pressure than the OE...

Powerglide Smart-Tech Servo Kit | Sonnax | Ratio-Style

PowerGlide Smart-Tech Ratio-Style Servo Kit Part No. 28821-10K The OE Powerglide servo design is inherently flawed. Its spring-powered design suffers from an improper apply/release ratio that is responsible for otherwise unexplained band failures,...

Powerglide Servo Piston Kit | Sonnax | Dual Seal O-Ring Style

PowerGlide Servo Piston Kit (Dual Seal O-Ring Style) Part No. 28821-01K Dual-seal design, O-ring style GM Powerglides used for drag racing generate higher line pressure than the OE servo piston can withstand. At pressures over 200 psi, the OE piston...