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The SON-28180G-01 is a 1.80 ratio Powerglide premium planetary with a 4340 long (OEM length) 27-spline output shaft that is manufactured and assembled by Sonnax. The Sonnax planetaries come completely assembled and include a heavy-duty flange plate and standard duty reversing ring gear. According to Sonnax the Premium planetaries are track proven to 2000 horsepower and are the 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.
The Sonnax Premium series planetaries feature the follow:
