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Transmission controllers are the brain of the automatic transmission in your vehicle. You can also call them the transmission CPU. The transmission controllers are engineered to work in unison with the engine CPU to provide a smooth and exhilarating driving experience. The transmission controllers are governed by various sensors and input readings from the engine CPU to determine the engine speed, road conditions, and driving behavior of the operator. The data is utilized to accurately predict and calculate the shift points of the transmission to deliver the best possible acceleration, performance, and fuel economy. The transmission controller will also prevent over-revving to protect the motor from severe damage. Sam’s Motorsports is proud to offer a great lineup of transmission controllers for your import or domestic car, truck, or SUV.