Question:

What is a transmission control module and when should it be replaced?

A transmission control module, or TCM, is an electronic device that controls the gears of an automatic transmission. It communicates with various sensors to determine when to shift gears and ensures the transmission operates smoothly. If you experience issues with shifting or notice a dashboard warning light illuminated, it could indicate a faulty transmission control module. It is recommended to replace a malfunctioning TCM to prevent damage to the transmission.

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