The problem with the Torque converter generates the symptoms that are misconstrued as it is a failing transmission. As a result, the customers will end up paying thousands of dollars to replace their transmission or they will rebuild it. But the cost of replacing the torque converter is less than that of replacing the transmission.
If the torque converter is faulty, the vehicle needs more work to keep the same speed level. The engine operation will need more revolutions to occur per minute, which will decrease the fluid's transmission fuel economy and pressure. The worst of all this is the system will produce more heat, which can also generate more problems in the other part.
Below is a list of the signs you find when the Torque Converter is faulty.
Transmission was slipping
Problems while shifting gear
Problems in vehicle speed
Shaking problem in the car
Noise in the car