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 TH400-4UB

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.

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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.

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.