Will the car move when releasing the brake in an automatic transmission?

[DallasFitz]

Automatic transmission cars will move when releasing the brake. Automatic transmission vehicles typically use hydraulic transmission devices to replace the mechanical clutch of manual transmission cars, so there is no clutch pedal. When the engine speed is low, the torque transmitted by the fluid is limited and insufficient to propel the car forward. When the gear lever is placed in the drive position and the brake pedal is released, as the throttle is applied and the engine speed increases, the transmitted torque grows, pushing the car forward. When the driver shifts into D gear, the engine drives the turbine to rotate, and the transmission fluid continuously impacts the turbine, allowing the drive wheels to receive this power. At this point, releasing the brake will cause the car to move forward as long as the driving force exceeds the vehicle's running resistance. Since the torque converter continuously transmits power to the transmission when the engine is running, power is transmitted as soon as the gear is engaged.