FTI Performance TH400 Level 4 Transmissions TH400-4S

Buy TH400 Level 4 Transmissions TH400 Online

Built for serious drag racing and high-powered performance applications, the FTI Performance TH400 Level 4 Transmissions TH400 delivers the strength, control, and consistency competitive drivers demand. This remanufactured three-speed automatic transmission is rated to handle up to 900 horsepower and features a reverse-shift-pattern, full-manual valve body for precise gear selection. An integrated trans-brake supports quicker, more controlled launches, making it an suzuki 300 boat motor excellent choice for weekend bracket racers, powerful street cars, and demanding mud trucks.

Inside, the TH400-4S is equipped with performance clutches and steels, a 34-element intermediate sprag, a four-clutch intermediate pack, a high-flow turbo 400 transmission pump, and a heavy-duty intermediate retainer. Its billet steel forward clutch hub 400 turbo transmission and hardened-steel 30-spline input shaft provide added durability under aggressive operating conditions. The race-prepared OEM aluminum case is finished in black and paired with a deep natural-aluminum transmission pan to improve fluid capacity and support dependable operation.

Designed around a factory Chevy bellhousing bolt pattern, this transmission offers proven TH400 performance in a competition-ready package. A torque th 400 transmission converter, flexplate, controller, wiring harness, cooler, fluid, and dipstick are not included, allowing builders to select th400 gearbox for sale components suited to their specific vehicle, engine combination, and racing goals. Proper installation and matched supporting components are recommended for performance.

Product Specifications

• Brand: FTI Performance
• Product Line: FTI Performance TH400 Level 4 Transmissions
• Manufacturer Part Number: TH400-4S
• Transmission Type: TH400 automatic transmission
• Number of Gears: 3-speed
• Advertised Horsepower Capacity: Up to 900 hp
• Bellhousing Pattern: Factory Chevrolet
• Valve Body: Full-manual valve body
• Shift Pattern: Reverse pattern
• Trans-Brake: Included
• First-Gear Ratio: 2.43:1
• Input Spline Count: 30
• Input Shaft: Hardened-steel TH350/TH400-style shaft
• Clutch Hub: Billet steel
• Transmission Case: Race-prepared OEM aluminum case with black finish
• Transmission Pan: Deep aluminum pan with natural finish
• Yoke Style: Slip-on/bolt-on
• Fluid-Fill Location: Transmission case
• Lockup Compatible: No
• Remanufactured: Yes
• SFI Rating: SFI 4.1/30.1
• Quantity: Sold individually

The transmission does not include a torque converter, flexplate, transmission controller, wiring harness, cooler, dipstick, or transmission fluid.

Internal Performance Components

The FTI Performance TH400 Level 4 Transmission is equipped with a 34-element intermediate sprag, performance clutches and steels, a high-flow pump, billet forward clutch hub, heavy-duty intermediate retainer, and a four-clutch intermediate pack. These upgraded components are designed to support demanding high-performance and racing applications.

Product Benefits

Handles High-Horsepower Applications

With an advertised capacity of up to 900 horsepower, the TH400-4S is suitable for powerful street cars, weekend bracket-racing vehicles, and performance-oriented mud trucks.

Faster, More Consistent Launches

The included trans-brake helps hold the vehicle at the starting line while engine speed builds, supporting harder and more repeatable launches in drag-racing applications.

Complete Manual Shift Control

Its full-manual valve body and reverse shift pattern give the driver direct control over gear selection, making the transmission well suited to competitive motorsports.

Improved Strength and Durability

A hardened-steel input shaft, billet-steel clutch hub, heavy-duty intermediate retainer, upgraded clutch packs, and performance steels help withstand increased power and repeated high-load operation.

Better Fluid Management

The high-flow pump supports dependable fluid circulation, while the deep aluminum transmission pan provides increased fluid capacity and improved heat management.

Proven TH400 Platform

The three-speed TH400 design is valued for its straightforward operation, strength, and suitability for high-performance Chevrolet applications.

Fitment Notice: Confirm bellhousing compatibility, vehicle configuration, driveshaft requirements, torque-converter selection, and installation components before ordering.

How much horsepower can the TH400 Level 4 Transmissions TH400 handle?

The FTI Performance TH400 Level 4 transmission has an advertised capacity of up to 900 horsepower, making it suitable for high-powered street vehicles, bracket racing cars, and mud trucks. Actual performance depends on the complete drivetrain setup, vehicle weight, tuning, and operating conditions.

Does the FTI TH400-4S include a torque converter?

No. The TH400-4S does not include a torque converter, flexplate, transmission cooler, controller, fluid, wiring harness, or dipstick. These components must be selected separately to match the vehicle’s engine, power level, and intended application.