Popular Performance Parts

Powerglide Boost Valve Kit | Sonnax | Largest OE Ratio .489''

Powerglide Boost Valve The OE boost sleeve in GM Powerglides wears from repeated oscillation of the boost valve. The wear allows leakage, reduces line pressure and contributes to line pressure instability. Additionally, the original steel parts are also...

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 HD Reverse Clutch Return Spring | Sonnax | 17-Pack

Heavy Duty Reverse Clutch Return SpringPart No. 28320A Package Quantity: 17 Sonnax heavy duty reverse clutch return spring 28320A improves the release rate of the transbrake-equipped GM Powerglide. Packaged in kits of 17 springs, all spring...

Powerglide Transmission Shift Reprogramming Kit by TransGo

TRANSGO PART: PG-2S CLASSIFICATION: REPROGRAMMING KIT FITS:  Aluminum Case Powerglide 63-73 FEATURES:   Full Manual control or Automatic shifts;  Full-race, Street/Strip. Special Instructions: ...

TH350 TH400 MT540 Powerglide HD Pump Bushing | Sonnax | Steel .615''

TH350 TH400 MT540 Powerglide HD Pump Bushing Sonnax Part Number: 34034T-01 OE PART NUMBER: 29511860 Worn babbit pump bushings in GM Powerglide, TH350, TH400 and Allison® AT-540 transmissions allow the converter hub and inner pump gear to move...