chapter 47

Which of the following is likely the problem if a stall speed is lower than specification by 600 rpm or more?

A freewheeling stator in the torque converter

Retarders can be in which of the following locations?

All of the above

During peak torque multiplication in a torque converter, which of the following would be occurring?

All of the above.

Technician A says that a torque divider has a planetary gear set. Technician B says that a torque divider's turbine is attached to a planetary gear set ring gear. Who is correct?

Both Technician A and Technician B

Technician A says that the primary key to torque multiplication in a torque converter is the stator. Technician B says that the angle of the blades in the turbine affects the torque multiplication. Who is correct?

Both Technician A and Technician B

Technician A says that the torque multiplication factor of a torque converter is affected by the angle of the stator blades. Technician B says that the turbine end play can affect the torque converter's multiplication factor. Who is correct?

Both Technician A and Technician B

A stall speed slightly lower than specified would typically indicate which of the following problems?

Engine power is lower than normal

A lockup clutch in the torque converter does which of the following?

It provides 100% efficiency between the impeller and turbine.

Technician A says that the stator locks up during the torque-converter coupling phase. Technician B says that the stator freewheels during the torque multiplication phase. Who is correct?

Neither Technician A nor Technician B

Technician A say that when a machine equipped with a torque divider first starts to move, the turbine may actually be turning slightly counterclockwise. Technician B says that the lockup clutch for a torque converter usually locks up only at top speed. Who is correct?

Technician A

Technician A says that vortex flow in the torque converter is highest during full stall. Technician B says that vortex flow follows the rotation of the converter housing or shell. Who is correct?

Technician A

Technician A says that a hydraulic retarder adds only a small amount of braking effort to a machine. Technician B says that the retardation force in a hydraulic retarder is controlled by the fluid pressure. Who is correct?

Technician B

Technician A says that when a torque converter is multiplying torque, the stator is freewheeling. Technician B says the impeller can drive turbine at approximately only 90-95% of engine speed. Who is correct?

Technician B

Technician A says that when a torque divider is used and the machine is stopped in gear, the turbine is stationary. Technician B says a torque divider has two inputs from the engine. Who is correct?

Technician B

The stall test can be used to determine which of the following?

The condition of the engine, torque converter, and the transmission

When the engine is idling and you are in park or neutral, which of the following is happening in the torque converter?

The impeller, the stator, and the turbine are all turning at close to the same speed.

What is meant when a torque converter is said to have a modulated lockup strategy?

The lockup clutch will apply based on a number of factors, including throttle request.

What are the two phases of torque-converter operation?

The torque multiplication phase and the coupling phase

What is the main purpose of a hydraulic retarder?

to reduce service brake wear