"MAXIMUM DUTY" STRAIGHT CUT PLANETARY GEARS ONLY, COMPLETE SET W/ HEAT TREATED RING GEAR AND BILLET SPLINED REACTION FLANGE

The Coan Racing COA‑12787 “Maximum Duty” Straight‑Cut Planetary Gear Set is a race-grade, rebuild-ready gear assembly designed for GM Powerglide transmissions. Featuring high-strength, straight-cut gears, this kit includes a heat-treated ring gear and a billet, splined reaction flange for robust torque delivery and improved gear engagement under extreme loads. Machined with tight tolerances and built to withstand the demands of bracket racing or high-horsepower street use, it ensures precision gear alignment and longevity.

Ideal for both 1.69 and 1.80 low-gear ratios, the COA‑12787 drops in as a complete gear pack, delivering sharp, strong shifts, reduced slippage, and drivetrain confidence without requiring modification to the transmission case.