Automatic Transmission : The automatic transmission is the part of the car that distributes the power from the engine to the wheels. It requires low to high gears to get the vehicle moving from stop to what ever speed you drive. The automatic transmission uses the following parts: clutches, differential, flywheel, input sensor, neutral safety switch, output sensor, planetary gear, shift solenoids, shifter, speed sensor, torque converter, transmission filter, transmission flush, transmission gaskets, transmission module,transmission seals, and valve body. If the transmission fails, you will usually experience slipping, no gear, only a high or low gear. Typicall problems may even start with a transmission leak, overheating, or lack of fluid flush/ filter/ maintenence.