How does a trans brake work on a Turbo 400?
Transmission brakes (transbrakes) have been available for the TH400 for decades. A transbrake is activated by a driver-controlled switch that connects to a solenoid mounted on the transmission. When engaged, the transbrake applies forward/low gear and reverse at the same time.
How much does it cost to build a TH400 transmission?
Stage 4 TH400 – Up to 1800 HP
| Price | Build # | Build Description |
|---|---|---|
| $3650 | 400-4A | Automatic Shift |
| $3700 | 400-4FM | Forward Pattern Full Manual shift |
| $3850 | 400-4RM | Reverse Pattern Full Manual |
| $4000 | 400-4RMTB | Reverse Pattern with transbrake |
How does a racing trans brake work?
In drag racing, a Transbrake is a mechanism that selectively places the transmission in A forward and reverse gear simultaneously. This allows the engine to create full power without transmitting that power through the driveline, allowing the car to stay in one place.
Are trans brakes hard on transmissions?
Installing a trans-brake isn’t hard. When the trans-brake engages, it makes the automatic transmission “think” that it is in both drive and reverse at the same time. This “confusion” allows you to mat the gas, get the engine spinning at full throttle, while also loading the torque converter.
What RPM should I leave on transbrake?
Re: Transbrake launch rpm? Anywhere between 3500 and 4500 with a converter that would “flash” to between 6700-7000 depending on air. Car would always 60′ about the same whether it was 3500 or 4500. Just a lot more violent the higher you leave on the chip.
What RPM should you leave on a Transbrake?
How hard is it to rebuild a TH400 transmission?
The TH400 is also a very simple unit, and is relatively easy to overhaul. It does not require a lot of special tools, or special procedures. Most hobbyists have great success building their own units at home.
What is a 34 element Sprag?
The 34 element sprag has over twice the holding power of the stock sprag. Eliminates intermediate sprag failure due to excessive torque input. The TH400 34 element PATC sprag replaces the stock 16 element unit, increasing the torque capacity by 110%. Standard in all PATC TH400 race transmissions.
What RPM should you leave on a transbrake?
How much is a trans brake?
What Is a Trans Brake? Available for most popular automatic transmission applications from companies like TCI for between $400 and $500, a trans-brake conversion consists of a few (reversible) case modifications and a specially modified valve body that’s equipped with an electric solenoid.
What kind of transmission is a Turbo 400?
The Turbo 400 transmission, known officially as the Turbo-Hydramatic and commonly referred to as simply the TH400, was part of a family of automatic transmissions developed and produced by GM.
How do I replace the BTE 401500 valve body on Turbo 400?
NOTE: Modifications are necessary to the Turbo 400 transmission before installation of the BTE 401500 valve body. STEP 1: Drain transmission before removal. After removal, disassemble transmission. STEP 2: Remove high gear clutch drum from transmission. Remove piston assembly from clutch drum.
When to replace center support bushing on a Turbo 400 transmission?
Recheck pressure regulator valve assembly. Filter not sealing properly, check for o-ring or filter spacer. We recommend replacing center support bushing any time you rebuild a Turbo 400 transmission. This bushing is very hard to check for wear. It holds your sealing rings in center to make your clutches last.
Where is the solenoid on a TH400 transbrake?
The heart of the transbrake is the solenoid. It mounts to the outside of the TH400, replacing the vacuum modulator. It controls a special modulator valve supplied with the TCI kit. Being electrically controlled by the driver, it provides lightning-fast launches at the dragstrip.