FTI TH400 Transmission - Level 3 - 800HP Rated - Reverse Pattern - GM Ultrabell

This FTI Performance Level 3 TH400 transmission is built to handle up to 800 horsepower, featuring a reverse pattern manual valve body and a GM Ultrabell. The Ultrabell is a one-piece bellhousing and case design, which offers a stronger connection between the engine and transmission compared to traditional two-piece setups. This robust construction is crucial for managing the significant torque and stress associated with high-horsepower applications, ensuring reliable power transfer to your drivetrain.

Designed for serious performance builds, this transmission incorporates several upgrades over stock TH400 units. The Level 3 build includes a performance-built torque converter matched to your engine's specifications, a heavy-duty clutch pack with increased friction material for better holding power, and a hardened input shaft to prevent twisting under load. The manual valve body allows for full driver control over gear selection, and the reverse pattern configuration is often preferred in racing applications for its intuitive shift logic. Every component is carefully selected and assembled to meet the demands of aggressive driving and competition.

When installing this transmission, it's important to ensure proper alignment with your engine and driveshaft. We recommend consulting the FTI Performance installation guide for specific details regarding fluid capacity, initial break-in procedures, and any necessary modifications for your vehicle. This transmission is a significant upgrade for GM vehicles looking to handle substantial power increases reliably.