Billet Steel Drum Assembly w/ 34 Element Sprag

BILLET STEEL DRUM ASSY. W/34 ELEMENT SPRAG

The Coan Racing COA‑22816A Billet Steel Direct Drum Assembly with 34‑Element Sprag is a premium rebuild component engineered for high-performance Turbo Hydramatic 400 transmissions. Crafted from precision-machined billet steel in the USA, it offers superior structural strength compared to stock drums, delivering reliable durability during high-stress applications commonly found in aggressive street and racing environments. The integrated 34‑element sprag enhances one-way clutch engagement by distributing torque loads across more rollers, minimizing slippage and heat buildup during launches, gear changes, and sustained torque events, features highly valued by racers striving for both reliability and performance.

Built as a drop-in replacement, the COA‑22816A installs directly into original-style TH400 cases without requiring any machining, making it an effortless upgrade during a rebuild. The billet steel construction ensures long-term dimensional stability under elevated temperatures and torque cycles, maintaining precise clutch engagement and smooth operation. Whether refreshing a worn transmission or assembling a race-ready drivetrain, this billet steel direct drum delivers dependable one-way clutch performance and rock-solid internal support for demanding driving conditions.