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A Race-Prepped TH400 Built for 1100HP
This is the FTI Performance TH400 Level 4.5 racing transmission with an SFI certified bellhousing, rated for 1100HP and built for the bracket racer, high-powered street car, or mud truck that needs a full manual valve body with a billet Sportsman transbrake. FTI builds this transmission on a race-prepped factory case with a reverse shift pattern and a full complement of upgraded internal components.
Key Features
- Rated for 1100HP.
- Race-prepped factory GM case with rollerized output shaft (case to output).
- FTI billet aluminum Sportsman transbrake valve body, full manual, reverse shift pattern.
- 300M material input shaft and billet aluminum direct drum.
- 34 element sprague and Performance Red race clutches.
- Deep aluminum pan for added fluid capacity and cooling.
- SFI certified bellhousing for sanctioned drag racing use.
Fitment
| Application | Requirements |
|---|---|
| GM TH400-pattern transmission swap | Requires a slip yoke and one-piece driveshaft. Racing or pre-emissions use only |
Specifications
| Detail | Value |
|---|---|
| Brand | FTI Performance |
| Model | TH400 Level 4.5 |
| Horsepower Rating | 1100 HP |
| Valve Body | Full manual, Sportsman transbrake, billet aluminum |
| Shift Pattern | Reverse |
| Input Shaft | 300M material, 30 spline |
| Direct Drum | Billet aluminum |
| Sprague | 34 element |
| Clutches | Performance Red race clutches |
| Pan | Deep aluminum |
| Bellhousing | SFI certified |
| Gear Ratios | 2.48 - 1.48 - 1.00 |
| Torque Converter Included | No |
| Trans-Brake Included | Yes |
What's Included
- One FTI TH400 Level 4.5 racing transmission with SFI certified bellhousing
About FTI Performance
FTI Performance builds torque converters and complete racing transmissions for street, street/strip, and race applications, with the TH400 Level series scaled from Level 3 through Level 5 to match horsepower and use case, from bracket racers to mud trucks.
FAQ
What horsepower is this transmission rated for?
1100HP.
Does this transmission include a torque converter?
No, the torque converter is sold separately.
What shift pattern does this transmission use?
A reverse shift pattern (PRN123), common on transbrake-equipped racing transmissions.
What driveshaft setup does this transmission require?
A slip yoke and one-piece driveshaft.
Is this transmission legal for street use?
FTI markets this build for racing or pre-emissions use only. Verify local regulations before street use.
What material is the input shaft?
300M material.
Does this transmission come with a trans-brake?
Yes, an FTI Sportsman billet transbrake valve body is included.
Is the bellhousing SFI certified?
Yes, this configuration includes an SFI certified bellhousing.
Installation Instructions
- Remove the existing transmission from the vehicle following the applicable factory or aftermarket service procedure.
- Confirm bellhousing bolt pattern and driveshaft slip yoke compatibility before installation.
- Install a compatible torque converter (sold separately) onto the input shaft before mounting the transmission.
- Mount the transmission to the engine, torquing bellhousing bolts to the specified values.
- Connect the transbrake wiring and verify correct operation before track use.
- Fill with the correct transmission fluid type and quantity, then verify shift pattern operation before driving.
FTI Performance
FTI Performance parts and accessories are stocked at Black Ops Auto Works for enthusiasts, racers and service focused builds. FTI Performance torque converters, automatic transmissions, valve bodies, transmission internals and fluid support American V8 street, strip and truck builds. The range covers GM 4L60E, 4L80E and TH400, Ford 4R70 and AODE, Mopar NAG1 and modern 8 speed applications. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 61 FTI Performance SKUs across vehicle specific, universal, replacement, performance and service applications. What This FTI Performance Collection Covers FTI Performance torque converters, automatic transmissions, valve bodies, transmission internals and fluid support American V8 street, strip and truck builds. The range covers GM 4L60E, 4L80E and TH400, Ford 4R70 and AODE, Mopar NAG1 and modern 8 speed applications. Torque converters Torque conv...
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