Question 1

All transmissions have a throttle valve linkage that controls forced downshifts.

Accepted Answer

Not all transmissions have a throttle valve linkage. Many modern transmissions, especially those that are electronically controlled, do not use a mechanical throttle valve linkage to control forced downshifts; instead, they rely on electronic signals from the throttle position sensor and other inputs.

Question 2

Fluid clutches and torque converters are one and the same.

Accepted Answer

Fluid clutches and torque converters are similar in that they both use fluid to transmit power between an engine and a transmission, but they are not the same thing. A fluid clutch is typically a smaller component that is used within a manual transmission to engage and disengage the engine from the transmission. A torque converter, on the other hand, is a larger component that is used in automatic transmissions to provide a smooth and variable transfer of power between the engine and transmission.

Question 3

Driving a vehicle with a very low level of ATF is not harmful to the transmission.

Accepted Answer

Driving a vehicle with very low ATF levels can cause significant harm to the transmission as this fluid plays a crucial role in lubricating and cooling the transmission components. Lack of proper lubrication can lead to excessive friction and heat buildup, which can ultimately cause the transmission to fail.

Question 4

All automatic transmissions use some sort of planetary gear set.

Accepted Answer

The answer of All automatic transmissions use some sort of...

Question 5

A change in tire diameter may affect transmission operation.

Accepted Answer

Changing the tire diameter can potentially affect the accuracy of the speedometer and odometer readings, which can cause issues with the transmission's shift points and overall operation.

Question 6

The Lepelletier design of planetary gear sets are used in some six- and seven-speed transmissions.

Accepted Answer

The Lepelletier design of planetary gear sets is used in some six- and seven-speed transmissions.

Question 7

​ A scan tool is needed to check fluid level in transmissions without a dipstick.

Accepted Answer

The answer of ​ A scan tool is needed to...

Question 8

A reduction ratio results in decreased torque with a reduced speed.

Accepted Answer

A reduction ratio in gears or transmissions increases torque while reducing speed.

Question 9

The speedometer drive assembly is geared to the input shaft.

Accepted Answer

The speedometer drive assembly is typically geared to the output shaft or the differential, not the input shaft, to measure the vehicle's speed accurately.

Question 10

Technician A says the manual shift valve, which is located in the valve body, moves indirectly to the movement of the throttle pedal. Technician B says the manual shift valve in the transmission is moved by the gear selector lever and linkage. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Technician B is correct. The manual shift valve in the transmission is moved by the gear selector lever and linkage. Technician A is incorrect because the manual shift valve does not move indirectly to the movement of the throttle pedal. The manual shift valve is responsible for controlling the shifting of gears in the transmission.

Question 11

It is not important to use the recommended ATF in the transmission.

Accepted Answer

It is important to use the recommended ATF (Automatic Transmission Fluid) in the transmission as using the wrong type can cause damage to the transmission and affect its performance.

Question 12

Overdrive improves fuel economy but increases engine noise.

Accepted Answer

Overdrive reduces engine speed, which can improve fuel economy and often reduces engine noise at higher speeds.

Question 13

An accumulator helps the servo operate the clutch smoothly.

Accepted Answer

An accumulator helps the servo maintain smooth pressure on the clutch, resulting in smooth operation.

Question 14

A slipping forward clutch may cause a delay in the shift of all forward gears.

Accepted Answer

A slipping forward clutch can cause a delay in the shift of all forward gears because the forward clutch is responsible for engaging and disengaging the transmission's forward gears. If the clutch is slipping, it may not engage properly and cause a delay in shifting.

Question 15

In order to properly diagnose a transmission complaint, it is essential that you gather as much information from the customer as possible.

Accepted Answer

Gathering information from the customer can provide valuable clues about the specific transmission problem, such as the type of noise, when it occurs, and whether it is accompanied by any warning lights or other symptoms. This information can help the technician narrow down the possible causes and perform a more accurate diagnosis.

Question 16

A clunking noise during acceleration may be the result of a worn CV joint.

Accepted Answer

A worn CV joint can cause a clunking noise during acceleration.

Question 17

Some newer designs of transmissions and transaxles may be equipped with two fluid filters.

Accepted Answer

Some newer designs of transmissions and transaxles may be equipped with two fluid filters to increase filtration efficiency and improve longevity of the unit.

Question 18

Engine performance can affect torque convertor clutch operation.

Accepted Answer

Engine performance, such as low idle speed or misfiring, can impact the torque converter clutch operation by causing it to disengage or not engage at all.

Question 19

A compound planetary gear set contains two complete planetary gear sets.

Accepted Answer

A compound planetary gear set consists of two or more planetary gear sets that are connected in series or parallel to achieve different transmission ratios. Therefore, it contains two complete planetary gear sets.

Question 20

Technician A says to reduce the chance of slipping under heavy load, increasing the pressure will hold the planetary control units tightly. Technician B says a throttle cable or electronics are used to sense engine load in a transmission or transaxle not equipped with a vacuum modulator. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Increasing the pressure in a transmission can indeed help to hold the planetary control units more tightly, reducing the chance of slipping under heavy load, which aligns with Technician A's statement. For vehicles not equipped with a vacuum modulator, a throttle cable or electronic sensors are used to sense engine load in the transmission or transaxle, supporting Technician B's claim.

Quiz 3: General Theories of Operation