TH400 Master O/Haul Kit

The TH400 Master O/Haul Kit by COAN is an essential solution for anyone planning a complete overhaul of a Turbo 400 automatic transmission. This kit is ideal for those rebuilding high-performance vehicles, restoring classic muscle cars, or upgrading trucks for enhanced durability. It ensures that every critical component is replaced with quality materials during the transmission refresh.

This master overhaul kit includes all necessary seals, gaskets, friction materials, and hard parts engineered to OEM specifications for the TH400 transmission platform. COAN manufactures each component to tight tolerances, ensuring proper fit and long-term reliability under both street and performance driving conditions. The kit's design accounts for wear patterns and material degradation that occur during transmission operation, providing a complete renewal of internal surfaces and sealing systems.

Professional mechanics, transmission shops, and serious DIY enthusiasts rely on this kit for rebuilding TH400 units destined for street cars, race vehicles, and heavy-duty applications. By consolidating all required parts into a single kit, builders eliminate guesswork and reduce the risk of missing critical components that could compromise shift quality or cause leaks. The comprehensive nature of the master kit makes it a reliable choice for any transmission rebuild project.