Upgrade your GM Turbo 400 (TH400) automatic transmission with the Speedmaster PCE602.1007 billet 300M steel input shaft. Crafted from high-strength 300M steel and precision billet-machined, this input shaft is engineered to handle significantly greater torque loads than a stock unit, making it an ideal choice for performance builds, street/strip applications, and high-horsepower GM-powered vehicles running a TH400 transmission.
Designed as a direct-fit replacement for the factory input shaft in GM TH400 transmissions, this Speedmaster shaft delivers the reliability and durability demanded by serious enthusiasts and racers. Whether you're rebuilding a TH400 for a drag car or a high-performance street machine, the PCE602.1007 offers a proven upgrade over OEM that helps protect your transmission investment under hard use.
