Automatic transmissions are complex components, mysterious boxes filled with fluid and strange-looking parts that challenge even an accomplished engine builder. Many racers and street performance enthusiasts incorrectly install their transmission with the critical Throttle Valve (TV) cable used to set internal line pressure and part throttle shifting either left disconnected or improperly adjusted. The result – total transmission melt down, often within a matter of a few miles.

Until recently, no manufacturer has offered a solution to this costly mistake. At TCI® we recognized the need for a product which eliminates the chance of transmission failure and produced the Constant Pressure Valve Body™. While the TV cable still needs connection for proper transmission shifting, the TCI® Constant Pressure Valve Body™ provides more freedom when setting part throttle shift points. Line pressure is fixed with no chance of encountering a low line pressure condition and the shift characteristics are greatly improved. Each kit comes with detailed instructions and can be installed by anyone with basic mechanical experience. Gone are the days of tricky TV cable adjustment and low pressure conditions thanks to the revolutionary TCI® Constant Pressure Valve Body™.