"Auto trans doesn't work" can mean an awfully lot of different things. If it's computer-controlled, low system voltage is going to make it do strange things. Chrysler was the first manufacturer to develop a computer-controlled transmission, and I'm more familiar with their system. Once a problem is detected, regardless if it's due to a charging system problem or something in the transmission, it defaults to second gear and stays there so you can drive it slowly to a repair shop without needing a tow truck. That is called "limp mode". It will come out of limp mode when you turn off the ignition switch and restart the engine. In your case, I wouldn't get overly concerned with the transmission yet until the charging system is fixed. Then if a problem still exists, there may be a diagnostic fault code stored in the Transmission Computer that needs to be erased.
Sunday, February 10th, 2013 AT 3:59 AM