What gear should an automatic transmission use when crossing water?

[LaEva]

Automatic transmission cars should use L gear or manual mode's 1st gear when crossing water. Precautions are as follows: Precautions for automatic transmission cars crossing water: When crossing water, lightly press the accelerator to maintain the engine speed around 2000 RPM. If waiting in water, check the water depth. If the water hasn't submerged the exhaust pipe, there's no need to worry. If it's too deep, maintain engine speed to prevent water backflow. As long as the engine doesn't stall, there's no excessive concern. Taking the vehicle body as an example, if the water level exceeds the chassis height and approaches the door trim, leave the water area immediately. Regardless of the vehicle type or engine, this situation can damage both the body and engine components. If the water level is low, slightly increasing speed can help water move away from the vehicle body through inertia. When water levels are low, follow these methods: Don't drive too fast, as high speed creates large water waves in front of the vehicle, increasing resistance and risking engine submersion; Select a low gear and maintain steady throttle. Choose a low gear before entering water, don't shift gears during the process, and maintain consistent engine RPM to ensure forward momentum and exhaust pressure; If the engine stalls in water, never attempt to restart unless absolutely certain the water isn't too deep, as the engine may have already taken in water.