7075 Billet Aluminum Forward Drum w/ 300M Alloy Input Shaft, TH Spline

The Coan Racing COA‑32813 Aluminum Forward Drum (7075 Billet) with 300M Alloy Input Shaft (TH Spline) is a precision-engineered forward drum assembly tailored for Turbo Hydramatic 350 transmissions. Milled from high-grade 7075 aluminum, this billet drum is significantly lighter than factory units, reducing rotating mass while retaining structural durability. At its core lies a robust 300M alloy input shaft, complete with TH-style splines that are oversized within the drum to eliminate common spline failures and provide a more reliable torque interface.

Specifically developed for performance street and racing applications, this assembly integrates precision engineering with rugged materials to boost drivetrain responsiveness and throttle feel. The COA‑32813 drops into the transmission without housing modifications and meshes flawlessly with Coan’s other high-performance components, making it a standout option for enthusiasts seeking enhanced durability, quicker shifts, and improved launch efficiency in demanding automatic transmission builds.