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What is a transmission control module on 2002 dodge caravan?

On a 2002 Dodge Caravan, the Transmission Control Module (TCM) is a computer that controls the operation of the automatic transmission. It receives signals from various sensors throughout the vehicle (like the vehicle speed sensor, throttle position sensor, and transmission temperature sensor) and uses this information to determine the appropriate gear ratios, shift points, and other transmission functions. Think of it as the "brain" of the transmission. If the TCM malfunctions, it can lead to a variety of transmission problems, including rough shifting, delayed shifting, inability to shift into certain gears, or even complete transmission failure.
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