Exam 10: Hydraulically Controlled Transmission

Some vacuum modulators are adjustable.

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

Two technicians are discussing automatic transmissions. Technician A says on many hydraulically controlled transmissions, the modulator valve receives vacuum from the engine. Technician B says the vacuum modulator converts the engine vacuum signal into a hydraulic pressure called modulator pressure. Who is correct?

Technician A says that modifying governor weights will alter transmission shifting. Technician B says that excessive modification of the governor weights may cause the transmission to not shift. Who is correct?

Because transmission line pressure must vary according to engine load and torque demand, other valves are used to act on the pressure regulator valve.

Tech A says that line pressure is reduced during light throttle conditions to improve fuel economy. Tech B says that as the engine speeds up in rpm, the transmission line pressure gradually reduces to maintain clutch pack pressure. Who is correct?

Governor pressure is always working against spring and line pressure.

The device that varies incoming line pressure using centrifugal force is known as:

When does the kickdown valve force downshifts?

Governor and throttle/modulator pressure are not needed for reverse to operate and are exhausted right into the transmission pan.

Technician A states that the pump sends fluid out under pressure. This release of fluid creates line pressure. Technician B states that line pressure sent to the throttle valve is mostly exhausted to the transmission pan when the throttle is open and the vehicle is under load. Who is correct?

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

Line pressure that is sent to the _______ is allowed to be exhausted back to the transmission pan when the vehicle is not moving and the governor is not creating any pressure.

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

Which of the following is typically calibrated to a particular engine on a governor?

Which of the following is a typical method of connecting a transmission throttle valve to the engine's throttle?

Which of the following is a typical method of connecting a transmission throttle valve to the engine's throttle?

Technician A says typically on hydraulic controlled transmissions, downshifting was often accomplished through the use of a kickdown valve. Technician B says in some transmissions, the kickdown valve was called a detent valve. Who is correct?

When the spring pressure of a mechanical line pressure regulator valve is overcome, excess fluid is returned to the transmission pan.

The automatic transmission's shift valve will ______ the passage of transmission oil at line pressure to apply a particular clutch or brake servo.