Transmission Control Module (TCM) faults are not unknown on these early Mazda 3s. Symptoms usually involve erratic shifting, a failure to select gear at all and having the car go into limp-home mode.

The TCM, or Transmission Control Module, is a key piece of any automatic transmission. Here's how it works in your car and how to fix it.

GM has issued a service update to address an issue related to the transmission control module (TCM) in certain 2020 Chevy Silverado HD and GMC Sierra HD models.

GM has issued a recall for certain units of the 2020 and 2021 Corvette C8 Stingray due to a problem with the Transmission Control Module (TCM).

Your 68RFE Cummins is a great jack-of-all-trades transmission that might need tuning to get the most out of it while helping ...