What is a symptom of a malfunctioning torque converter?

A malfunctioning torque converter can often lead to engine stalling because it plays a crucial role in transferring power from the engine to the transmission. When the torque converter is not functioning correctly, it may not properly engage or disengage, causing a disruption in the power flow. This can lead to the engine stalling, especially when the vehicle comes to a stop or when the driver attempts to accelerate.

When the torque converter fails to provide the necessary hydraulic pressure or engage the lockup mechanism, the engine may struggle to maintain idle, resulting in stalling. This symptom indicates that the engine and transmission are not working harmoniously, reflecting an underlying issue with the torque converter.

The other options represent different potential problems in a vehicle but are not specific indicators of a malfunctioning torque converter. Fluid leaks could relate to various transmission components, not just the torque converter, while increased fuel consumption might be caused by various other engine inefficiencies. Noisy operation could signal issues in several areas, including the transmission or engine itself, rather than solely the torque converter.