MODULATOR, SOLENOID, CASE CONNECTOR O-RING (TH400, TH350)

The Coan Racing COA‑22163 Modulator/Solenoid/Case Connector O‑Ring is a critical sealing component engineered for use in TH400 & TH350 transmissions. As a compact yet essential part, this precision-molded O‑ring ensures a leak-free hydraulic pathway between the valve body and the modulator or solenoid connector, preserving accurate pressure signals critical for consistent shift timing and modulation.

Manufactured in the USA to Coan’s exacting standards, it is a direct replacement for OEM seals and crafted to withstand the high-pressure, high-temperature environments characteristic of street-rod or racing transmissions. Whether used during a full rebuild or to resolve specific hydraulic leaks, the COA‑22163 provides dependable sealing performance and contributes to the smooth, reliable operation of high-performance automatic transmission systems.