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 GM Hydra-Matic 9T65 9-speed automatic transmission is a variant of GM’s 9TXX 9-speed automatic transmission family. It was officially announced in conjunction with the 2018 Chevy Traverse and the ...

The Hydra-Matic 6T80 (production code MHM) is a six-speed automatic transmission produced by General Motors for use in front-wheel-drive vehicles with a transverse powertrain orientation. Developed in ...

General Motors, LLC (GM) is recalling certain 2022-2023 Chevrolet Express and GMC Savana vehicles. Incorrect software in the transmission control module (TCM) may result in harsh shifting, reduced ...