Which symptom may indicate a failing torque converter?

The symptom that indicates a failing torque converter is transmission slipping. The torque converter is a crucial component that connects the engine's output to the transmission. It allows for smooth vehicle movement by multiplying the engine’s torque and adjusting for changes in engine speed. When the torque converter begins to fail, it may struggle to maintain a proper connection between the engine and the transmission. This can lead to a sensation of slipping, where the engine is revving but the vehicle does not accelerate as it should. Drivers often notice this as a loss of power or hesitation when trying to accelerate, which is directly linked to the malfunctioning of the torque converter.

In contrast, fluid leaks are generally indicative of a seal or gasket issue within the transmission system, rather than a specific torque converter failure. An overheating engine can result from many different problems, including insufficient coolant or issues unrelated to the torque converter itself. Rough idling may point to engine problems, such as fuel delivery issues or air intake problems, rather than issues specifically linked to the torque converter. Each of these symptoms can signify different mechanical issues, with transmission slipping being directly associated with the performance of the torque converter.