Overview

FTI Performance TH400 Level 4 Transmissions TH400-4S

Brand: FTI Performance
Manufacturer’s Part Number: TH400-4S
Part Type: Automatic Transmissions
Product Line: FTI Performance TH400 Level 4 Transmissions
Summit Racing Part Number: FTI-TH400-4S
UPC: 887753825568
Number of Gears: 3
Bellhousing Bolt Pattern Manufacturer: Chevy
Transmission Shift Pattern: Reverse
Valve Body Style: Full manual
Transmission Advertised Horsepower Rating: 900
Torque Converter Included: No
Flexplate Included: No
Transmission Controller Included: No
Wiring Harness Included: No
Transmission Cooler Included: No
Trans-Brake Included: Yes
Lockup Compatible: No
Transmission Pan Style: Deep
Transmission Pan Material: Aluminum
Transmission Pan Finish: Natural
Yoke Style: Slip-on/bolt-on
Input Spline Quantity: 30
Input Shaft Material: Hardened steel
Input Shaft Style: TH350/400
First Gear Ratio (Automatic Transmissions): 2.43
Clutch Hub: Billet Steel
Transmission Case Style: OEM
Transmission Case Material: Aluminum
Transmission Case Finish: Black
Transmission Shield Built In: No
Flexplate Shield Built In: No
Fluid Fill Location: Case
Transmission Fluid Included: No
Dipstick Included: No
SFI Rating: SFI 4.1/30.1
Remanufactured: Yes
Quantity: Sold individually

FTI Performance TH400 Level 4 Transmissions

Overview

The FTI Performance TH400 Level 4 Transmission TH400-4S is built for serious racers who demand strength, precision, and consistent performance under extreme conditions. Designed for drag racing and high-horsepower applications, this transmission delivers reliable power transfer and quick, responsive shifts. As a result, it is an ideal choice for competitive builds and performance-driven vehicles.

Performance & Durability

In addition, this transmission features a full manual valve body equipped with a trans-brake, allowing for precise launch control and improved reaction times. High-performance clutches and steels, along with a 34-element intermediate sprag, enhance durability and load capacity. Because of this, it can handle demanding conditions while maintaining consistent performance.

Advanced Engineering

Moreover, the inclusion of a high-flow pump and race-prepped stock case improves fluid circulation and overall efficiency. A billet forward clutch hub and heavy-duty intermediate retainer further strengthen internal components. For this reason, this transmission is capable of withstanding repeated high-stress runs without compromising reliability.

Applications & Benefits

Finally, the TH400 Level 4 transmission is suitable for a wide range of applications, including bracket racing, high-powered street cars, and even mud trucks. Its robust construction and race-ready features make it a versatile option for demanding builds. Ultimately, it delivers a powerful combination of durability, control, and race-proven performance for serious enthusiasts.