Exam 9: Torque Converter Principles

When the turbine speed is less than about 90% of the impeller speed, the shape of the converter case makes the fluid flow in a circular motion, through the impeller, turbine, and stator. What does this create?

Torsional damper springs are built into the torque converter clutch piston assembly.

Tech A says that the torque converter can multiply the amount of torque transmitted from the engine to the transmission. Tech B says that the torque converter allows the engine to idle when the vehicle stops in traffic. Who is correct?

Technician A says that it is almost impossible to drain all of the fluid out of a converter. Technician B says that it is impossible to remove all of the old fluid and debris without a flushing machine. Who is correct?

Which of the following functions does a torque converter perform?

A vehicle stalls when coming to a stop. After test-driving the vehicle, it is found that the Torque Converter Clutch (TCC) is remaining engaged as the vehicle slows down. Technician A says that the vehicle probably needs a new torque converter. Technician B says that the TCC solenoid may be sticking and could need replaced. Who is correct?

Tech A states that the torque converter should be replaced in the event of catastrophic transmission failure. Tech B states that it is possible to flush out the converter on a specialized flushing machine. Who is correct?

Which of the following is used increase fuel economy and prevent heat generation in the torque converter?

Two technicians are discussing torque converters. Technician A says that a torque converter does a similar job as the manual clutch. Technician B says that the torque converter multiplies torque from the engine to the input shaft of the transmission. Who is correct?

Torque converters should always be flushed using a specialized converter flushing machine.

Which of the following torque converter parts are similar in construction?

Which of the following statements regarding a torque converter is NOT true?

If friction material is to be reused, it is ok to clean it in a solvent tank.

When rebuilding a transmission, most shops will:

Which of the following torque converter components are similar in construction?

Which of the following was used in early automatic transmissions?

Most transmission shops do not rebuild torque converters due to the amount of time needed to perform the service.

Technician A says that the torque converter multiplies the amount of torque transmitted from the engine to the transmission. Technician B says that the torque converter couples and uncouples the engine and transmission as the vehicle stops and starts in traffic. Who is correct?

A torque converter should always be replaced during rebuilding as the internal lock-up clutch may be worn.

With the engine idling, little torque is transferred from the impeller to the turbine, as the fluid flow is too slow.