Can I switch to automatic transmission after failing the manual test four times?
1 Answers
After failing the manual transmission test four times, you can go to the driving test center to switch to automatic transmission for the final attempt. Additional information is as follows: Manual transmission: A manual transmission (MT), also known as a manual gearbox, requires the driver to manually shift gears by moving the gear lever to change the gear engagement inside the transmission, thereby altering the gear ratio to achieve speed variation. Working principle: The pump wheel and turbine form a working pair, similar to two fans placed opposite each other. The wind from one fan drives the blades of the other, with the wind acting as the medium for kinetic energy transfer. If liquid replaces air as the medium, the pump wheel drives the turbine to rotate via the liquid. By adding a guide wheel between the pump wheel and turbine, a speed difference can be achieved through reaction forces, enabling variable speed and torque. Automatic transmission principle: Since the torque converter's automatic speed and torque variation range is insufficient, multiple planetary gear sets are connected in series behind the turbine to improve efficiency. The hydraulic control system automatically operates the planetary gears based on engine conditions, achieving automatic speed and torque variation. The auxiliary mechanism's automatic gear shifting cannot meet all driving needs, such as parking or reversing, so an intervention device, the manual shift lever, is included. It features markings like P (Park), R (Reverse), N (Neutral), and D (Drive), with additional "2" and "1" positions in Drive for starting or climbing slopes. The transmission range is divided into several gear ratio segments, with continuous variation only within specified segments, making AT a semi-automatic transmission between stepped and continuously variable types.
