Sonnax offers complete GM Powerglide planetary assemblies in a variety of gear set options and configurations to ensure you get the performance you want without overpaying or sacrificing quality. Each comes fully assembled and ready to install.
Track-proven to 2,000 horsepower, Sonnax Premium planetaries are an ideal choice when extra durability is needed at a reasonable cost in demanding applications. 1.80 Ratio Premium planetary assembly kit 28180G-01 features premium-processed sun and pinion gears that are a big step up from standard case-hardened and tempered varieties. A top-quality material combined with a special heat-treating process results in gears with improved grain structure and stability that are tougher and more wear resistant.
See chart and specs below to determine if this planetary assembly suits your application, or dial in options here to choose your build.
Track-Proven to 2,000 HP
Track-Proven to 3,000 HP
|Sonnax Warranty||2 Years (Gears Only)||2 Years (Gears & Shaft)|
|Gear Material||9310 Suns & Pinions||9310 Suns & Pinions|
Advanced (Learn More)
Extreme Gears for Extreme Performance
To greatly improve the life of Extreme gear sets, the sun and pinion gear undergo the same advanced processing as assemblies developed for Formula 1™, NASCAR® and other high-end professional racing circuits:
Advanced Process gears undergo a three-step process that takes aftermarket performance gear manufacturing to a whole new level:
|Shaft Splines||Cut Spline||Rolled Spline|
|Ring Gear||Standard||Maximum Duty|
Applies to planetary assembly kits only
My Sonnax-equipped Powerglide transmission performed flawlessly through the ultimate torture test: HOT Rod magazine DRAG WEEK. The car went over 1,000 miles, pulling a TRAILER full of tools, parts, and equipment, PLUS racing five days in a row. The transmission was EASILY the strongest link in the chain!D. Diesner Libertyville, IL