Direct Drum Assembly w/ Super Sprag, 4 Clutch Intermediate

DIRECT DRUM ASSY W/SUPER SPRAG, 4 CLUTCH INTERMEDIATE

The Coan Racing COA‑22817B Direct Drum Assembly with Super Sprag and 4‑Clutch Intermediate is a high-performance front-end upgrade crafted for TH400 transmissions. Precision-engineered and machined in the USA from durable steel, this complete assembly combines a robust 4-clutch intermediate pack with a heavy-duty Super Sprag one-way clutch to deliver enhanced torque capacity and reliable engagement under severe load and heat conditions.

Designed as a drop-in replacement, the COA‑22817B installs cleanly into stock transmission cases without the need for machining or modifications, providing consistent internal alignment and fluid integrity. The Super Sprag ensures crisp, dependable one-way clutch operation during aggressive launches and gear transitions, while the 4-clutch intermediate setup offers sufficient holding power for serious street/strip driving and bracket racing, without the bulk of larger clutch stacks.

Ideal for those aiming to reinforce their transmission’s front end, the COA‑22817B delivers improved shift feel, torque handling, and drivetrain reliability in a compact, directly installable package tailored for high-power applications.