Overview

FTI Performance TH400 Level 4 Transmissions TH400-4UB

Brand: FTI Performance
Manufacturer’s Part Number: TH400-4UB
Part Type: Automatic Transmissions
Product Line: FTI Performance TH400 Level 4 Transmissions
Summit Racing Part Number: FTI-TH400-4UB
UPC: 887753825643
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
Tailshaft Length (in.): 4.063 in.
Yoke Style: Slip-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
Notes: Features Ultra Bell bellhousing.

FTI Performance TH400 Level 4 Transmissions

Overview

The FTI Performance TH400 Level 4 Transmission TH400-4UB is engineered for high-performance racing applications where strength, precision, and reliability are critical. Designed to handle up to 900 horsepower, this transmission delivers consistent power transfer and rapid, responsive shifts. As a result, it is an excellent choice for drag racers and performance enthusiasts alike.

Performance & Durability

In addition, this transmission features a full manual valve body with an integrated trans-brake, allowing for precise launch control and improved reaction times. High-performance clutches and steels, combined with a 34-element intermediate sprag, enhance durability under extreme conditions. Because of this, it can withstand repeated high-stress runs while maintaining consistent performance.

Advanced Engineering

Moreover, the transmission includes a high-flow pump and a race-prepped stock case to improve fluid circulation and overall efficiency. The billet forward clutch hub and heavy-duty intermediate retainer provide added strength where it matters most. For this reason, it offers long-lasting reliability in demanding racing environments. The inclusion of an Ultra Bell bellhousing further enhances structural integrity and safety.

Applications & Benefits

Finally, this TH400 Level 4 transmission is suitable for a wide range of applications, including bracket racing, high-powered street builds, and off-road vehicles. Its robust construction and race-ready features ensure dependable performance across various conditions. Ultimately, it delivers a powerful combination of durability, control, and race-proven capability for serious performance builds.