Speedmaster GM TH400 Transmission Billet Aluminum Valve Body with Engine Braking PCE634.1012.01

The Speedmaster GM TH400 Transmission Billet Aluminum Valve Body (PCE634.1012.01) is a premium replacement component designed for GM TH400 automatic transmissions. Manufactured from billet aluminum for superior strength and durability, this valve body features integrated engine braking functionality that enhances transmission control and engine compression braking performance. It is engineered as a direct replacement for OEM TH400 valve bodies, making it an ideal upgrade for restoration, performance tuning, and high-output engine applications.

This billet aluminum construction offers improved reliability compared to cast alternatives, with precise machining that ensures proper valve operation and fluid flow management throughout the transmission system. The integrated engine braking feature provides enhanced drivetrain control, especially beneficial for towing, downhill driving, and situations requiring controlled deceleration. Ideal for hot rod builds, restorations, and performance-oriented TH400 transmission rebuilds, this valve body delivers both functional enhancement and long-term durability for serious transmission work.

Key Features & Benefits

• Billet Aluminum Construction: Premium billet aluminum design provides superior strength and durability compared to cast valve bodies.
• Engine Braking Integrated: Built-in engine braking functionality enhances transmission control and compression braking performance.
• Direct TH400 Replacement: Engineered as a direct bolt-in replacement for GM TH400 automatic transmission valve bodies.
• Precision Machined: CNC-machined construction ensures precise valve operation and optimal fluid dynamics.
• Performance-Focused Design: Ideal for hot rod builds, restoration projects, and high-output engine applications.

Specifications

Ideal Applications

• TH400 transmission rebuilds and restoration projects
• Hot rod and custom vehicle builds
• High-performance drivetrain upgrades
• Towing and hauling vehicle applications