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Faster tougher stronger


Heavy Duty & High Performance Upgrades

Sonnax’s innovative approach to design and manufacturing allows this venerable old transmission to thrive even as power and speeds steadily increase. Sonnax offers top-of-the line, proven solutions for aluminum Powerglide transmissions at any level of racing, and is the gold standard for circle track and bracket vehicles as well as the fastest door slammers running. To achieve a winning match of quality and performance, trust Sonnax to help you cross the finish line!

View More Powerglide Performance Parts:

Sonnax powerglide transmission parts catalog v2 1

NEW Catalog

Powerglide Transmission Parts Catalog, Vol. 2

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Overcoming the Servo Pin Bias Effect

OE Powerglide servo design flaws are responsible for many “mystery” band failures, broken shafts and staging issues. This video dramatically shows the pin bias effect in action and why Sonnax servo upgrades are critical for improving the reliability of the capable Powerglide transmission.