"EXTREME DUTY" PLANETARY, STD LENGTH, STEEL CARRIER, BILLET BOLT-ON OUTPUT SHAFT, STRAIGHT CUT GEARS, 1.69 RATIO

The Coan Racing COA‑12715C “Extreme Duty” Planetary Assembly is a robust, performance-grade internals package engineered exclusively for GM Powerglide transmissions. Built to deliver optimal durability in high-torque environments, this standard-length unit features straight-cut gears mounted in a rugged steel carrier, ensuring precise gear meshing and enhanced strength under extreme load.

One of the standout features of this planetary assembly is the inclusion of a billet, bolt-on output shaft, providing tailored durability and serviceability. The planet set is precisely matched with a high-capacity 1.69 gear ratio for improved torque multiplication, making it suitable for aggressive street use, bracket racing, or high-horsepower builds.

Manufactured with performance and longevity in mind, the COA‑12715C offers a drop-in fit with Powerglide cases of standard 28-inch length, requiring no modifications for installation. Its heavy-duty steel construction and precision engineering ensure reliable transference of torque and superior wear resistance, making it a premier choice for rebuilders and racers seeking next-level strength in their Powerglide setups.