Direct Drum Assembly w/ Super Sprag, 5 Clutch Intermediate

DIRECT DRUM ASSY W/SUPER SPRAG, 5 CLUTCH INTERMEDIATE (INCLUDES COA-22230 & COA-22818A)

The Coan Racing COA‑22817 Direct Drum Assembly with Super Sprag and 5-Clutch Intermediate is a versatile, high-performance drivetrain upgrade designed for TH400 transmissions. Constructed in the USA with precision-machined steel, this assembly combines a robust 5-clutch intermediate pack with a heavy-duty Super Sprag, offering enhanced torque capacity, smoother engagement, and extended durability under extreme load conditions.

Built as a true drop-in solution, the COA‑22817 installs directly into stock transmission cases without machining, maintaining precise alignment and hydraulic consistency. The integrated Super Sprag enhances engagement reliability, reducing slippage during hard launches and ensuring repeatable, crisp shifts. Coan includes critical internal components (COA‑22230 & COA‑22818A), providing a complete turnkey assembly that simplifies rebuilds or performance upgrades.

Engineered to withstand the rigors of drag racing, bracket competition, or heavy-performance street driving, this drum assembly reinforces the front-end of your transmission, delivering improved shift feeling and drivetrain responsiveness under high torque and heat. For anyone building a resilient, race-ready transmission, the COA‑22817 stands as a top-tier direct-drum solution delivering strength, reliability, and performance in one comprehensive package.