The 03-04 Jeep TJ Wrangler TCM Computer 4.0 Automatic transmission computer is a specific part designed for Jeep vehicles. It is a bolt-on style engine control unit that requires programming and has a flash memory. The computer is manufactured by Jeep in the United States and comes with a manufacturer warranty. It is a genuine part with the manufacturer part number 56044386AD and is interchangeable with the superseded part number 56044385. This computer is essential for controlling the automatic transmission in the specified Jeep models.