AUT 201 Week 3 Quiz

Harsh-shifting transmission could be caused:

• if the line pressure is too low during normal cruising speeds

• when the line pressure is too high during normal cruising speeds.

• when the line pressure is too low during low cruising speeds

• when the line pressure is too high during high cruising speeds

Technician A says that the throttle valve is controlled by a cable or linkage hooked to the engine throttle linkage. Technician B says that a misadjusted throttle valve cable can prevent wide-open throttle (WOT) on an engine. Who is correct?

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B

When checking the effect of throttle pressure on line pressure, which of the following might you read on a properly operating transmission with the throttle valve closed?

• 15 PSI

• 50 PSI

• 75 PSI

• 200 PSI

If the vacuum modulator's diaphragm becomes ripped, the customer may report that the vehicle shift is extremely delayed and harsh, often shifting only at the engine red line, regardless of the driving condition or throttle position.

• True

• False

After leaving the automatic transmission's cooler, the transmission fluid is ready to enter the transmission lubrication circuit. Which parts are typically lubricated by this circuit?

• Clutches and front pump assembly

• Bushings and planetary gears

• Transmission pan and filters

• The torque converter and flexplate

Technician A says to check the effect of throttle pressure on the boost valve, you do not need to disconnect the throttle cable or linkage. Technician B says to check the effect of throttle pressure on the boost valve, you need to connect a pressure gauge to the transmission line pressure test port.

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B

Engine vacuum, atmospheric pressure and spring tension all work on the vacuum modulator diaphragm. Which of the following statements describes the action of these forces on the diaphragm?

• As manifold vacuum increases, it works with atmospheric pressure to stretch the spring, increasing modulator pressure

• As manifold vacuum decreases, the spring extends, increasing modulator pressure

• As atmospheric pressure changes, there is an inversely proportional change in modulator pressure

• As manifold pressure changes there is a directly proportional change in modulator

Technician A says that when governor pressure on one side of a shift valve overcomes spring pressure and throttle pressure on the other side, an upshift occurs. Technician B says when reverse boost pressure on one side of the reverse valve overcomes governor pressure on the other side, shift into reverse occurs. Who is correct?

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B

Which of these is least likely to cause harsh shifting during normal cruising speeds?

• High line pressure

• Low line pressure

• Broken or missing accumulator spring

• None of the above

When does the kickdown valve force downshifts?

• Wide open throttle

• Three-quarters open throttle

• Half open throttle

• One-quarter open throttle