AUT 2020 Test 1

Technician A says that in a conventional transmission, the speed gears freewheel around the mainshaft until they are locked to it by the appropriate synchronizer. Technician B says that speed gears are an integral part of the countershaft assembly. Who is correct?

a. Technician A

Technician A says that reverse lamp switches are activated at the transmission/transaxle by the gearshift lever. Technician B says that reverse lamp switches are activated by a sensor at the input shaft. Who is correct?

a. Technician A

Technician A says the clutch is disengaged when the clutch pedal is depressed. Technician B says the clutch is engaged when the clutch pedal is depressed. Who is correct?

a. Technician A

When the clutch pedal is released on a hydraulic clutch linkage, the ___.

a. master cylinder piston is returned by spring tension

Before making a clutch adjustment, it is necessary to ___.

a. measure clutch pedal free travel

The component used to ensure that the mainshaft (output shaft) and main (speed) gear locked to it are rotating at the same speed is known as a ___.

a. synchronizer

Technician A says the pilot bushing aligns the flywheel to the crankshaft. Technician B says the pilot bushing supports the transmission input shaft. Who is correct?

b. Technician B

Which of the following gear ratios indicates an overdrive condition?

c. 0.85:1

Technician A says the transmission may jump out of gear if the transmission is not mounted squarely and securely to the engine. Technician B says excessive input shaft endplay may cause a transmission to jump out of gear. Who is correct?

c. Both A and B

While discussing the power flow through a five-speed transmission while it is in first gear: Technician A says that power enters on the input shaft, which rotates the countershaft that is engaged with first gear. Technician B says that the first gear synchronizer engages with the clutching teeth of first gear and locks the gear to the main shaft, allowing power to flow from the input gear through the countershaft and to first gear and the main shaft. Who is correct?

c. Both A and B

While discussing the purpose of a clutch pressure plate: Technician A says that the pressure plate assembly squeezes the clutch disc onto the flywheel. Technician B says that the pressure plate moves away from the clutch disc so that the disc can stop rotating. Who is correct?

c. Both A and B

Clutch pedal free play sets the clearance between what two components?

c. Release bearing and pressure plate

Which of the following is not a typical manual transmission/transaxle lubricant?

c. Standard hydraulic oil

Which of the following would not cause hard shifting?

c. Weak pressure plate

Torsional coil springs in the clutch disc ___.

c. absorb the torque forces

The surface of the pressure plate contacts the ___.

c. clutch disc

Insufficient clutch pedal clearance results in ___.

c. premature release bearing failure

When the clutch is disengaged, the power flow stops at the ___.

c. pressure plate and flywheel

Technician A says that most transaxles have a countershaft between the main and output shafts. Technician B says that a countershaft is always in motion when the engine is running. Who is correct?

d. Neither A nor B

While discussing different abnormal clutch noises: Technician A says that pilot bushing noises are most noticeable in cold weather and usually occur when the pedal is being depressed and the transmission is in neutral. Technician B says that release bearing noise is most noticeable when the transmission is in neutral and occurs when the clutch pedal is depressed and stops when the pedal is fully released. Who is correct?

b. Technician B

While discussing the cause of a pulsating clutch pedal: Technician A says that this can be caused by a low fluid level in the hydraulic system. Technician B says that this can be caused by a warped flywheel. Who is correct?

b. Technician B

While discussing the various types of transmissions found on today's vehicles: Technician A says that one type is the sliding gear transmission. Technician B says that one type is the sliding collar transmission. Who is correct?

b. Technician B

Which of the following is probably not the cause of a vibrating clutch?

a. Excessive crankshaft end play

Which type of gear develops gear whine at high rotational speeds?

a. Spur gear

Technician A says in a manual transmission/transaxle, idler gears are used to provide reverse. Technician B says idler gears are used to allow the engine to idle. Who is correct?

a. Technician A

Technician A says that clutch drag is caused by a warped disc. Technician B says that clutch drag is caused by liquid contaminant on the friction surfaces. Who is correct?

a. Technician A

Technician A says that clutch slippage is most noticeable in higher gears. Technician B says that clutch slippage is not noticeable in lower gears. Who is correct?

a. Technician A

Technician A says that double-cone synchronizers have friction material on both sides of the synchronizer rings. Technician B says that multiple-cone synchronizers are used with larger engines and require a larger transmission housing. Who is correct?

a. Technician A

Chipped speed gears can cause which of the following:

b. Clicking noises

Which of the following is the least likely cause of gear clash when shifting?

b. Damaged input gear teeth

Most modern transmissions and transaxles are which type:

b. Fully synchronized constant mesh design

A bearing-type noise is heard immediately when the clutch pedal is depressed; as the pedal is pushed to the floor the noise remains about the same. When the clutch pedal is released, the noise disappears. Technician A says the clutch pilot bearing could be at fault. Technician B says the clutch release bearing could be at fault. Who is correct?

b. Technician B

A customer says that occasionally when he is at a stoplight with the transmission in first gear and the clutch pedal depressed, the vehicle begins to move by itself. Technician A says the problem could be caused by insufficient clutch pedal free play. Technician B says the problem could be caused by an internal leak in the clutch master cylinder. Who is correct?

b. Technician B

A transmission is stuck in gear. Technician A says worn or misadjusted clutch linkage may be the cause. Technician B says the fluid level should be checked. Who is correct?

b. Technician B

Technician A says a gear ratio of 1.2:1 is an overdrive gear ratio. Technician B says a gear ratio of 0.9:1 is an overdrive gear ratio. Who is correct?

b. Technician B

Technician A says both internal and external transmission/transaxle linkages require adjustment. Technician B says all powertrain mounts should be inspected when adjusting the transmission/transaxle linkage. Who is correct?

b. Technician B

Technician A says manual transaxles can be found in all types of modern FWD, RWD, and 4WD vehicles. Technician B says transaxles are used in FWD vehicles only. Who is correct?

b. Technician B

Technician A says that if a single idler gear is used to obtain reverse gear, its size and number of teeth must be used to calculate gear ratios. Technician B says that an idler gear is often used for reverse gear because it causes the output shaft to rotate in the reverse direction of the input shaft. Who is correct?

b. Technician B

When reviewing the procedure for installing a clutch disc, Technician A says the clutch disc should always be installed with its hub and springs toward the engine. Technician B says the splines of the disc should be clean and never greased or oiled. Who is correct?

b. Technician B

While discussing ways to determine if a pilot bushing is faulty: Technician A says that if it operated quietly, it does not need to be replaced. Technician B says that a careful inspection of the transmission's input shaft can determine the condition of the pilot bushing. Who is correct?

b. Technician B

A growling noise is heard from a manual transaxle. Which of the following is the least likely cause?

b. Worn pilot bearing

In a transaxle, the pinion gear on the pinion shaft meshes with the ___.

b. ring gear

When an idler gear is placed between the driving and driven gears, the driven gear:

b. rotates the same direction as the drive gear

The clutch, or friction, disc is connected to the ___.

b. transmission input shaft

Which of the following gear ratios provides the highest torque multiplication?

c. 5.23:1

Which of the following would not cause clutch binding?

c. An oil-soaked clutch disc

A vehicle has a clutch slippage complaint, Technician A says the pressure plate may be weak. Technician B says a faulty crankshaft rear main seal could be the cause. Who is correct?

c. Both A and B

Technician A says direct drive uses a gear ratio of 1:1. Technician B says during direct drive the input and mainshafts are turning at the same speed. Who is correct?

c. Both A and B

Technician A says that an oil-soaked clutch disc can cause clutch chatter. Technician B says that clutch chatter can be caused by loose bell housing bolts. Who is correct?

c. Both A and B

Technician A says that if the hydraulic clutch reservoir is overfilled, the clutch may prematurely wear. Technician B says that if the fluid level is too low, the clutch may not disengage. Who is correct?

c. Both A and B

Technician A says that incorrect clutch adjustment can cause premature clutch disc wear. Technician B says that incorrect clutch adjustment can cause premature clutch release bearing wear. Who is correct?

c. Both A and B

Technician A says that some synchronizer assemblies use frictional material on the blocking rings to reduce slippage. Technician B says that the inside of some blocking rings is shaped like a cone lined with many sharp grooves. Who is correct?

c. Both A and B

Technician A says that the countergear or cluster gear is actually several gears machined out of single piece of iron or steel. Technician B says that the countergear is driven by the clutch gear and drives the mainshaft speed gears. Who is correct?

c. Both A and B

Technician A says the clutch allows the engine to continue to run when the vehicle is brought to a stop. Technician B says the clutch allows for easier shifting of the gears. Who is correct?

c. Both A and B

Technician A says that all manual transmission vehicles have at least one pilot bearing or bushing for the input shaft. Technician B says that the pressure plate always rotates with the input shaft when the engine is running. Who is correct?

d. Neither A nor B

Technician A says transmission noise that is only heard when the vehicle is driven in first gear is probably caused by a bad input shaft bearing. Technician B says noise in first gear only could be caused by bad output shaft bearings. Who is correct?

d. Neither A nor B

While discussing shift mechanisms: Technician A says that the interlock notches hold the transmission in the selected gear. Technician B says that the detent notches prevent the selection of more than one gear during operation. Who is correct?

d. Neither A nor B

While discussing the different types of pressure plates: Technician A says that coil spring types are commonly used because they have strong springs. Technician B says that Belleville-type pressure plates are not commonly used because they require excessive space in the bell housing. Who is correct?

d. Neither A nor B

A whining noise is heard from the bell housing/transmission area when the clutch pedal is depressed. The most likely cause is:

d. Worn release bearing