Trans-Brake Solenoid TH-350

The Trans-Brake Solenoid TH-350 is a precision-engineered transbrake control valve designed for high-performance drag racing and bracket racing applications where launch control is critical. This solenoid operates the transbrake circuit on TH-350 transmissions, enabling drivers to hold engine RPM at the starting line while keeping the transmission in both Drive and Reverse simultaneously—a technique that maximizes tire bite and eliminates wheel spin for consistent, repeatable launches. Built by TCI, a respected manufacturer of transmission components and racing systems, this solenoid is essential for racers who demand competitive edge through hydraulic precision.

Engineered with a 0.250-inch stroke, the Trans-Brake Solenoid TH-350 precisely controls hydraulic flow to engage and disengage the transbrake circuit at split-second intervals. The compact design—measuring 2.85 x 2.25 x 4.15 inches and weighing just 1.11 pounds—integrates seamlessly into existing TH-350 transmission installations without requiring extensive modification. Its robust construction handles repeated thermal cycles and high-pressure hydraulic conditions typical in serious drag racing environments, ensuring reliability across hundreds of passes and consistent shift performance when combined with a proper transbrake controller.

This component is ideal for dedicated bracket racers, heads-up competitors, and street-to-strip enthusiasts running modified TH-350 transmissions who want factory-grade reliability paired with racing-specific control. Installation requires integration with a transbrake control module and proper wiring to the vehicle's electrical system; professional installation is highly recommended to ensure correct hydraulic line routing and electrical connections. The Trans-Brake Solenoid TH-350 delivers the repeatability that separates winners from the field, making it a trusted choice for racers serious about launch consistency and elapsed-time performance.