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

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.

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).

To convince the transmission control module that a working automatic was still installed and clear the fourteen-odd diagnostic codes, [Dean] put together a block of eight common automotive relays.

From there, the aftermarket transmission control module (TCM), which is mounted in the car like any normal ECU, can control the shifting based on just a few easily inputted signals such as ...