Question 1

Technician A says when an external gear is in mesh with an internal gear, the two gears will rotate in the same direction. Technician B says there will be a torque increase when an external gear drives and is in mesh with an internal gear. Who is correct?

Accepted Answer

Technician A is correct. When an external gear is in mesh with an internal gear, the two gears will rotate in the same direction. Technician B is incorrect because there will actually be a torque decrease when an external gear drives an internal gear due to the increase in speed.

Question 2

Technician A says nearly all transmission problems can be corrected by installing a rebuild kit. Technician B says a technician should inspect the material in the filter before tearing down the transmission or transaxle. Who is correct?

Accepted Answer

Technician B is correct. It is important to inspect the material in the filter before tearing down the transmission or transaxle because it can provide insight into what may be causing the problem. However, Technician A is incorrect because not all transmission problems can be corrected by installing a rebuild kit. Some problems may require additional repairs or replacement of certain components.

Question 3

Which of the following is true of a Simpson gear train?

Accepted Answer

A Simpson gear train uses one common sun gear and provides three forward reduction gears.

Question 4

Technician A says the output gear will rotate in the opposite direction to the input gear when an external gear drives another external gear. Technician B says the output gear will rotate in the same direction as the input gear when an external gear drives another external gear. Who is correct?

Accepted Answer

The answer of Technician A says the output gear will...

Question 5

Technician A says the output of the gear set will be in the opposite direction to the input, which produces reverse gear when the planetary carrier is held. Technician B says the gear set produces a gear reduction when the planetary carrier is the input member. Who is correct?

Accepted Answer

Both technicians are correct. Technician A is describing how the gear set produces reverse gear when the planetary carrier is held. Technician B is describing how the gear set produces gear reduction when the planetary carrier is the input member. Both of these statements are accurate.

Question 6

When an external gear is in mesh with an internal gear, in which manner will both gears rotate?

Accepted Answer

When an external gear meshes with an internal gear, both gears rotate in the same direction. This is due to the way the teeth of the gears interact with each other, which is different from the interaction between two external gears.

Question 7

How much will a hard gasket compress?

Accepted Answer

On average, hard gaskets will compress less than 20 percent.

Question 8

Technician A says a drum filled with thick fluid that houses several closely fitted, thin steel discs that are connected to the front and rear axles is called a viscous coupling. Technician B says to provide different amounts of torque to the drive axles, a viscous coupling uses a gear set similar to a differential. Who is correct?

Accepted Answer

Both technicians are correct. The viscous coupling is a device that uses a drum filled with a thick fluid and several steel discs closely fitted that connects the front and rear axles. To provide different amounts of torque to the drive axles, a gear set similar to a differential is used by the coupling.

Question 9

Technician A says a faulty torque converter typically emits a whining noises from the transmission. Technician B says faulty clutches or bands are never the cause of abnormal noise from the transmission. Who is correct?

Accepted Answer

Technician A is correct, as a faulty torque converter can indeed emit a whining noise from the transmission. Technician B, however, is not correct, as faulty clutches or bands can also be a cause of abnormal noise from the transmission. Therefore, only Technician A is correct.

Question 10

Technician A says a faulty output shaft can cause vibrations. Technician B says an unbalanced torque converter can cause vibrations. Who is correct?

Accepted Answer

Both technicians are correct. A faulty output shaft can cause vibrations as it is responsible for transferring power from the transmission to the wheels. An unbalanced torque converter can also cause vibrations as it is located between the engine and transmission, and any imbalance can result in vibrations being transmitted throughout the driveline.

Question 11

While discussing transmission lip seals: Technician A says when installing a lip seal make sure the lip is facing in the correct direction. Technician B says the lip should always be aimed away from the source of pressurized fluid. Who is correct?

Accepted Answer

The answer of While discussing transmission lip seals: Technician A says...

Question 12

Technician A says low oil pressure may be the result of a shaft fitted with a check ball in which the check ball does not seat properly. Technician B says scoring of the shaft may be the result of a blocked oil delivery passage. Who is correct?

Accepted Answer

Technician A is correct because low oil pressure can be caused by a malfunctioning check ball located in a shaft. Meanwhile, Technician B is correct because the obstruction of the oil delivery passage can cause the shaft to be scored. As a result, both technicians' statements are correct.

Question 13

Technician A says when removing a seal, inspect the sealing surface or lips. Technician B says this check should be done before cleaning the seal. Who is correct?

Accepted Answer

Both technicians are correct. It is important to inspect the sealing surface or lips before removing the seal to identify any damage or wear that may have led to the seal failure. This inspection should be done before cleaning the seal to avoid further damage to the sealing surface.

Question 14

Technician A says piston seals are designed to seal against high pressures. Technician B says the seal is positioned so that the lip faces the source of the pressurized fluid Who is correct?

Accepted Answer

Both technicians are correct. Piston seals are designed to seal against high pressures, and they are positioned with the lip facing the source of the pressurized fluid to maximize their sealing effectiveness.

Question 15

Technician A says after a vehicle battery is disconnected and reconnected, transmission/transaxle computers may require a relearn procedure. Technician B says that to optimize driveability and performance, some computers memorize operation patterns. Who is correct?

Accepted Answer

Technician A is correct that some transmission/transaxle computers may require a relearn procedure after a vehicle battery is disconnected and reconnected. This is because the computer needs to calibrate itself based on sensor data and will not operate properly until it has done so. 
Technician B is also correct that some computers memorize operation patterns to optimize driveability and performance. For example, an engine control module may adapt to a driver's style of driving, allowing for smoother transitions between gears and better fuel efficiency.

Question 16

Technician A says only one gear reduction forward gear can be provided by a single planetary gear set. Technician B says only one reverse reduction gear can be provided by a single planetary gear set. Who is correct?

Accepted Answer

Technician B is correct. A single planetary gear set can provide multiple gear ratios in the forward direction, but only one gear ratio in the reverse direction. This is because the sun gear and ring gear cannot switch positions in a planetary gear set when the direction of torque is reversed.

Question 17

Which of the following will cause a vibration from a transmission or transaxle?

Accepted Answer

A poorly mounted torque converter can cause a vibration from a transmission or transaxle. Worn wheel bearings can cause a noise and possibly affect steering, but not necessarily a vibration from the transmission or transaxle. Dragging brake pads can cause a noise and affect the vehicle's acceleration, but not necessarily a vibration from the transmission or transaxle. Misbalanced tires can cause a vibration, but it would be felt throughout the vehicle and not just from the transmission or transaxle.

Question 18

Technician A says there will be a speed increase when an internal gear drives and is in mesh with an external gear. Technician B says the output gear will rotate in the opposite direction to the input gear when an external gear drives another external gear. Who is correct?

Accepted Answer

The answer of Technician A says there will be a...

Question 19

Technician A says the sun gear always rotates in the opposite direction to the rotation of the pinion gears. Technician B says the pinion gears will always follow the same direction as the ring gear when the ring gear and carrier pinions are free to rotate at the same time. Who is correct?

Accepted Answer

The answer of Technician A says the sun gear always...

Question 20

Technician A says most oil seals should be installed dry. Technician B says before and during installation, oil seals should be kept clean. Who is correct?

Accepted Answer

Oil seals should be lubricated with the same type of oil they will seal, not installed dry, and they must be kept clean to ensure proper function and longevity.

Quiz 5: Transmission Designs