Faulty transmission control valve can fail and cause rear wheels to lock up, increasing risk of crash, according to General Motors.

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.

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.

GM discovered that a faulty control valve in the automatic transmission of the at-risk trucks and SUV s can cause their rear wheels to lock up without warning, which could make for some ...

Comparing features of the latest stand-alone automatic transmission control modules. Which one will work best for your transmission? Jeff Smith breaks it down.

GM is covering the repair costs of transmission control valve problems for over a half-million full-size trucks and SUVs for 15 years or 150,000 miles.

2012 Audi A6 2013 Audi A6 2014 Audi A6 See More Service Bulletins Corrective action: Dealers will either flush the auto transmission fluid and/or replace the transmission control module.