Speedmaster GM TH400 Transmission Billet Aluminum Full Manual Valve Body

The Speedmaster GM TH400 Transmission Billet Aluminum Full Manual Valve Body (PCE634.1006.01) is a precision-engineered replacement component designed for GM TH400 automatic transmissions. Machined from billet aluminum and finished in silver, this manual valve body replaces the factory unit to enable full manual shift control, allowing drivers to hold gears and manage transmission behavior for improved performance tuning and durability in racing, hot-rodding, and high-performance applications.

This billet aluminum construction offers superior strength and durability compared to cast factory originals, with tight tolerances to ensure reliable operation. The full manual design gives complete control over transmission function, making it ideal for custom builds, performance vehicles, and enthusiasts who demand precision shift management. Compatible with GM TH400 transmissions, this valve body integrates into existing transmission assemblies to deliver the control and reliability required in demanding driving conditions.

Key Features & Benefits

• Billet Aluminum Construction: Machined from solid billet aluminum for superior strength and durability over cast factory originals.
• Full Manual Control: Enables complete manual shift control and gear selection for performance tuning and driver-controlled transmission management.
• GM TH400 Compatibility: Designed as a direct replacement for GM TH400 automatic transmission applications.
• Silver Finish: Durable silver finish provides corrosion resistance and clean appearance.
• Precision Engineered: Tight tolerances ensure reliable operation in high-performance and racing environments.

Specifications

Ideal Applications

• Custom performance vehicle builds requiring manual transmission control
• Hot-rodding and classic car restoration projects
• Racing applications demanding precision shift management
• High-performance street and track vehicles