Description

Mileage status: No donor-vehicle odometer reading is provided for this replacement/performance transmission. Any warranty or service distance is separate from prior mileage.

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.

Shipping & delivery

Standard orders are normally handled and processed in 1 business day, Monday through Saturday, after payment is confirmed and product availability has been verified. Estimated carrier transit is 1-2 days after dispatch, with transit days Monday through Saturday. Combined with the 1 handling period above, the estimated total delivery time is 1-3 business days for standard destinations. These are estimates, not guarantees. Oversized or freight shipments, deliveries to Alaska, Hawaii, or U.S. territories, and deliveries requiring carrier appointments may take longer or require a separate quote. See our Shipping Policy.