The automatic transmission cannot go backwards because:
* Gear Design: In an automatic transmission, the clutch gears and planetary gears are arranged in such a way that they can only transmit torque in one direction from the engine to the transmission.
* Hydraulic block: The hydraulic block in the automatic transmission controls the supply of fluid pressure to the clutches and bands, which turn the gears on and off. It is designed to operate correctly in only one direction of power transmission.
* Electronic control unit (ECU): The ECU controls the operation of all components of the automatic transmission, including the valves of the hydraulic unit. It is programmed to change gears based on data from sensors and driver instructions. The ECU does not allow reverse gear to be selected when the vehicle is moving forward.
* Parking Lock: When the gear shift lever is in the Park position, the Parking Lock is activated, which mechanically locks the transmission shaft, preventing the vehicle from moving.