Speedmaster GM TH400 Transmission Billet Aluminum External TransBrake Full Manual Valve Body PCE634.1007

The Speedmaster PCE634.1007 is a billet aluminum external valve body designed for GM TH400 transmissions, engineered for high-performance manual control applications. This full manual valve body features TransBrake functionality and is constructed from billet aluminum for superior strength and precision compared to stock cast components, making it ideal for drag racing, street rod builds, and serious transmission modifications.

This valve body replaces the factory casting and allows complete manual shift control, giving drivers the ability to manage gear selection and timing for optimal performance in racing or custom automotive applications. The billet aluminum construction provides durability under extreme operating conditions while maintaining tight tolerances critical for transmission function. Compatible with TH400 transmission platforms, this component is a key upgrade for builders seeking maximum control and reliability in high-performance transmission setups.

Key Features & Benefits

• Billet Aluminum Construction: Machined from solid billet aluminum for superior strength and precision over factory cast valve bodies.
• Full Manual Control: Enables complete manual gear shifting and transmission management for racing and performance applications.
• TransBrake Equipped: Integrated TransBrake function supports launch control and line-lock features for drag racing.
• TH400 Compatible: Direct replacement valve body engineered specifically for GM TH400 transmission platforms.
• High-Performance Design: Built to withstand extreme operating conditions in drag racing, street rod, and custom builds.

Specifications

Ideal Applications

• Drag racing transmission builds requiring full manual shift control
• High-performance street rod and custom car transmission upgrades
• Racing transmission systems needing TransBrake launch control functionality
• Serious TH400 transmission modifications for maximum driver control