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Transmission control unit (TCM) or Engine control unit (ECM)..

May 26th, 2009
A transmission control unit or TCU is a device that controls modern electronic automatic transmissions. A TCU generally uses sensors from the vehicle as well as data provided by the Engine Control Unit (ECU) to calculate how and when to change gears in the vehicle for optimum performance, fuel economy and shift quality. Most TCU are [...]
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Posted in Transmission Components | 8 Comments »



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