Question 1

A transmission can prevent a downshift if the maximum rpm is too high.

Accepted Answer

A transmission system is designed to prevent downshifts that would cause the engine to exceed its maximum RPM, protecting the engine from potential damage.

Question 2

When the vehicle is in drive and the transmission shifts into second gear, line pressure is moving past the manual valve, around the 1-2 shift valve, and into the:

Accepted Answer

When the transmission shifts into second gear, the line pressure moves past the manual valve and into the 2-3 shift valve as part of the hydraulic circuit operation in automatic transmissions.

Question 3

When transmission is in second gear, fluid flows around the 1-2 shift valve and into the center of the 2-3 shift valve and then to the:

Accepted Answer

In second gear, the fluid is directed to the second gear clutch to engage it, allowing the vehicle to operate in second gear.

Question 4

When the second gear clutch has pressure going to it, the 2-3 shift valve has what pressure acting on it?

Accepted Answer

The 2-3 shift valve is influenced by both governor pressure and the 2-3 shift valve spring pressure.

Question 5

If vehicle speed decreases, governor pressure decreases, allowing the transmission to downshift back into first gear.

Accepted Answer

Governor pressure in a transmission is directly related to vehicle speed. As speed decreases, governor pressure decreases, which can cause the transmission to downshift to a lower gear like first gear.

Question 6

Technician A says that if throttle pressure increased enough in second gear, it could cause the transmission to downshift into first gear. Technician B says that by decreasing vehicle speed, this would cause a lower governor pressure, allowing the transmission to downshift into first gear. Who is correct?

Accepted Answer

By decreasing vehicle speed, this would cause a lower governor pressure, allowing the transmission to downshift into first gear.

Question 7

The shifting of a hydraulically controlled transmission is a constant push-pull between all of the following EXCEPT:

Accepted Answer

Boost valve pressure is not typically involved in the shifting process of a hydraulically controlled transmission. The shifting is primarily influenced by governor pressure, shift spring pressure, and vacuum modulator/throttle valve pressure.

Question 8

Technician A says that a vehicle can downshift by fully depressing the throttle, allowing full throttle pressure to overcome governor pressure. Technician B says that a vehicle may downshift when governor pressure drops below line pressure. Who is correct?

Accepted Answer

Both technicians are correct. A vehicle can downshift by fully depressing the throttle, which increases throttle pressure to overcome governor pressure. Additionally, a vehicle may downshift when governor pressure drops below line pressure, as this indicates a need for a lower gear.

Question 9

A vehicle will upshift into second gear only when governor pressure exceeds which of the following?

Accepted Answer

The governor pressure must exceed the spring pressure, throttle valve pressure, and vacuum modulator pressure in order for the vehicle to upshift into second gear.

Question 10

Governor pressure is the same on both the 1-2 shift valve and the 2-3 shift valve.

Accepted Answer

Governor pressure is used to control the timing of shifts in an automatic transmission, and it is applied to both the 1-2 and 2-3 shift valves to determine when shifts should occur based on vehicle speed.

Question 11

Technician A says that a malfunctioning governor can cause a shifting problem between first and second gear. Technician B says that a broken shift valve spring can cause a shifting problem. Who is correct?

Accepted Answer

Both technicians are correct. A malfunctioning governor can affect the hydraulic pressure and timing of shifts, causing issues between first and second gear. Similarly, a broken shift valve spring can disrupt the proper operation of the valve body, leading to shifting problems.

Question 12

Which of the following is a type of automatic transmission uses a mainshaft and counter shaft, similar to a manual transmission?

Accepted Answer

Dual shaft transmission uses a mainshaft and counter shaft, similar to a manual transmission.

Question 13

When the transmission is first shifted into drive, fluid moves past the manual valve and into the:

Accepted Answer

Fluid moves past the manual valve and into the 1-2 shift valve when the transmission is first shifted into drive.

Question 14

When the transmission is shifted into drive, fluid moves through the 1-2 shift valve and into the:

Accepted Answer

When the transmission is shifted into drive, fluid moves through the 1-2 shift valve and into the first gear clutch or band to engage first gear.

Question 15

As the vehicle accelerates, what component controls line pressure flowing past it?

Accepted Answer

The answer of As the vehicle accelerates, what component controls...

Question 16

With the vehicle in drive and accelerating, governor pressure is sent to the back side of the ____________ to counteract spring pressure?

Accepted Answer

The 1-2 shift valve is responsible for controlling the shift from first to second gear, and governor pressure is used to counteract the spring pressure to facilitate this shift.

Question 17

The throttle valve or vacuum modulator adds force to the spring side of the 1-2 shift valve to act against governor pressure.

Accepted Answer

The throttle valve or vacuum modulator is designed to adjust the hydraulic pressure in the transmission, which influences the shift timing by adding force to the spring side of the shift valve, counteracting the governor pressure.

Question 18

When governor pressure exceeds 1-2 shift valve spring pressure, the port to the first gear clutch or band is shut, releasing it.

Accepted Answer

In an automatic transmission, when governor pressure exceeds the spring pressure of the 1-2 shift valve, it causes the valve to move, closing the port to the first gear clutch or band, thus releasing it and allowing the shift to second gear.

Question 19

Technician A says that the higher the engine load or the more the throttle is opened, the higher the line pressure. Technician B says that as vehicle speed increases, so does governor pressure. Who is correct?

Accepted Answer

Both technicians are correct. Higher engine load or throttle opening increases line pressure, and vehicle speed increase raises governor pressure.

Question 20

Governor pressure is always working against spring and line pressure.

Accepted Answer

Governor pressure is used to oppose the spring and line pressure in order to control the speed of the engine.

Quiz 10: Hydraulically Controlled Transmission