Items marked by the "TCM" tag:

This part 2 is a conclusion to our 2-part insight into the Transmission Control Module / Mechatronics Units testing.

Every automatic transmission specialist has their own method of dealing with Transmission Control Modules and mechatronics units issues. Some rebuild them, some replace them, but most curse this complex part of the gearbox. However, do we all know them well? To begin, let us review on what we know about valve bodies.

The transmission control module (TCM) is considered to be one of the most complicated structural elements of the automatic transmission. It consists of numerous microcircuits and chips which analyze hundreds of transmission parameters in real-time mode.