What does a malfunctioning torque converter typically exhibit?

A malfunctioning torque converter can lead to several significant performance issues within a vehicle's transmission system. Poor fuel economy is a common symptom because the torque converter's failure to engage or disengage properly can cause the engine to work harder than necessary, leading to excessive fuel consumption.

Excessive engine vibrations may occur as a result of the torque converter not smoothly transferring power from the engine to the transmission. This can disrupt the overall balance of the vehicle and lead to an uncomfortable driving experience.

Unresponsiveness in gear shifting is another critical sign of torque converter problems. A faulty torque converter may struggle to maintain the correct pressure, causing delayed or erratic shifts, which can impair overall vehicle performance and drivability.

Each of these symptoms—poor fuel economy, excessive engine vibrations, and unresponsiveness in gear shifting—highlights the vital role the torque converter plays in the functioning of the automatic transmission system. Therefore, the presence of all these issues collectively indicates a malfunctioning torque converter.