Coan 22121 Gasket & Seal Kit for GM TH400 Transmission

The Coan 22121 Gasket & Seal Kit is a comprehensive rebuild kit designed specifically for GM Turbo Hydra-Matic 400 (TH400) automatic transmissions. Manufactured in the USA by Coan Engineering, this complete sealing package provides all the essential gaskets, O-rings, and sealing components needed to restore proper hydraulic integrity and eliminate leaks during transmission maintenance or complete rebuilds.

Key Features:

• Complete gasket and seal assortment for TH400 transmissions
• Includes all paper gaskets, rubber seals, and O-rings for interior sealing points
• Covers transmission case, valve body, and hydraulic circuits
• Precision-manufactured to Coan Racing performance standards
• Ensures proper hydraulic pressure and leak-free operation
• Ideal for performance rebuilds, drag racing, and street applications
• Made in the USA since 1976

This gasket and seal kit is essential for maintaining reliable clutch and band engagement while preventing fluid loss at critical seal points. Coan Engineering has been a trusted name in high-performance transmission components for over 40 years, providing racers and enthusiasts with quality parts designed to withstand the demands of high-stress performance environments.