Servos

Powerglide Servo Pin Clip | Sonnax

Powerglide Servo Piston & Cover Kit | Sonnax | Dual-Seal Design PTFE Ring Style w/ Purple Anodized

Powerglide Servo Piston & Cover Kit GM Powerglide transmissions used for drag racing generate higher line pressure than the OE servo piston can withstand. At pressures over 200 psi, the OE piston can crack, resulting in transmission failure. Sonnax...

Powerglide Servo Piston | Sonnax | Dual-Seal Design w/ PTFE or Metal Seals

Powerglide Servo Piston 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...

Powerglide Servo Cover Kit | Sonnax | Purple Anodized

Powerglide Servo Cover Kit 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 can crack, resulting in transmission failure. Sonnax servo cover kit 28821-03K...

Powerglide Servo Cover Kit | Sonnax | Non-Anodized

Powerglide Servo Cover Kit 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 can crack, resulting in transmission failure. Sonnax servo cover kit 28821-06K...

Powerglide Replacement Seal Kit for Sonnax 28821-OK Servo

Powerglide Replacement Servo Seal Kit Sonnax replacement seal kit 28821-OK refreshes the seals in Sonnax O-ring style servo kits. PACKAGE CONTAINS Servo Piston O-Rings (2) Servo Cover Gasket Servo Cover O-Ring

Powerglide Replacement Seal Kit for Sonnax 28851-10K Servo

Powerglide Replacement Servo Seal Kit Replacement seal kit for Sonnax Smart-Tech® ratio-style servo kit 28821-10K. PACKAGE CONTAINS Cover Gasket Case-to-Housing O-Ring Housing-to-Piston O-Ring Housing-to-Separator O-Ring Secondary...

Powerglide Replacement Seal Kit for Sonnax 28821-TK Servo

Powerglide Replacement Servo Seal Kit Sonnax replacement seal kit 28821-TK refreshes the seals in Sonnax PTFE sealing ring-style servo kits. PACKAGE CONTAINS Servo Piston Seals (2) PTFE Servo Cover Gasket Servo Cover O-Ring Servo Pin O-Rings...

Powerglide Replacement Seal Kit for Sonnax 28821-09K Servo

Powerglide Replacement Servo Seal Kit Replacement seal kit for super hold servo kit 28821-09K PACKAGE CONTAINS PTFE Primary Piston Seal (2) Cover Gasket PTFE Servo Pin Seal (2) 1 Extra Secondary Piston D-Ring Case to Cover O-Ring Cover to...

Powerglide Race-Calibrated Servo Return Spring Kit | Sonnax

Powerglide Race-Calibrated Servo Return Spring Kit OE Numbers: 3830235, 3815914, 3830235 Mystery band failures in GM Powerglides are a common result of using inconsistent aftermarket servo return springs and weak OE springs prone to collapse. This is a...

Powerglide Supported Servo Pin & Cover Kit | Sonnax

Powerglide Supported Servo Pin & Cover Kit Conventional GM Powerglide servos are not well-supported. At high apply pressures or with a worn servo pin bore, the servo piston is side-loaded in the case, causing friction and binding of the piston. The...

Powerglide Servo Piston Seal | Sonnax

Powerglide Servo Piston Seal Sonnax PTFE servo piston seal fits OE and aftermarket GM Powerglide servos. Material: PTFE Seal Style: Scarf cut Height: 0.143" Outer Dia.: 2.766" Width: 0.088" PACKAGE CONTAINS Seal (1)

Powerglide Servo Piston Return Spring | Sonnax

Powerglide Servo Piston Return Spring The servo return spring is the source of many "mystery" band failures caused by inconsistent servo release and weak springs prone to collapse. Sonnax servo piston return spring 28133 for GM Powerglide units is a...

Powerglide Servo Piston Kit | Sonnax | Dual-Seal Design PTFE Ring Style

Powerglide Servo Piston Kit GM Powerglide transmissions used for drag racing generate higher line pressure than the OE servo piston can withstand. At pressures over 200 psi, the OE piston can crack, resulting in transmission failure. Sonnax servo piston...

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...