EXTENSION HOUSING SEAL (LARGE 2 11/16 OD)

The Coan Racing COA‑22172 Extension Housing Seal (Large 2 11/16″ OD) is a precision-crafted, high-performance seal engineered for TH400 transmissions. Manufactured in the USA to Coan’s exacting standards, this seal forms a critical barrier at the extension housing interface, effectively preventing fluid leakage and preserving hydraulic pressure under extreme operating conditions.

Its robust construction ensures reliable performance amid high temperature and vibration, making it ideal for rebuilding or upgrading race, street, and strip transmissions that demand durability and tight sealing under high-stress environments.