![]() ![]() ![]() The complexity of modern TCMs are unique to each make and model, and each calculation is based on a number of parameters - the end goal being to optimize the efficiency of your transmission. This video demonstrates how to remove and reinstall the ECM (Engine Control Module) and TCM (Transmission Control Module) in a Volvo. Older TCMs typically have dedicated inputs and sensors on the controlled engine components, whereas more modern units will gather information from a shared input. The (TCM) transmission control module can be a standalone controller or located in the (PCM) powertrain control module. Driving with a faulty transmission control module can cause serious problems for your transmission and engine down the road. Modern day TCMs receive signals from several sources including engine sensors, automatic transmission sensors, and other controllers that determine how to run the transmission in the most efficient way. The age of your TCM plays a factor in how the unit functions. The TCM is responsible for functions including the optimal time to switch gears, monitoring fuel economy and emissions, and shift quality. The transmission control module is known by several names-the TCM, PCM, ECM, ECU, PGM-FI-and the problems associated with them can be esoteric. Sensors in automatic vehicles send information to the TCM so that the transmission changes gears at the best time for ideal fuel efficiency and optimal engine performance. Manual transmission vehicles don’t have this because the driver is the TCM. Sensors and data provided by the Engine Control Module calculate various components that identify how well your car or truck is performing. 78-2112F Engine Control Module - Requires Programming, Direct Fit. The transmission control module is what allows the transmission in automatic vehicles to shift gears. This product cannot be ordered at this time. A Transmission Control Module (TCM), also known as a Transmission Control Unit (TCU), is an electronic device that controls the automatic transmission in your vehicle. Transmission Control Modules Driving with a faulty transmission control module can cause serious problems for your transmission and engine down the road. Transmission Control Module, Chevrolet Silverado 2500 HD 2015-09, Silverado 3500 HD 2015-09 GMC Sierra 2500 HD 2015-09, Sierra 3500 HD 2015-09. ![]()
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