Driveline Midterm

Ratios are normally expressed as the equivalent of the first number to 1; thus, 8 to 2 would be expressed as ___.

4:1

Technician A says powertrain mounts hold the engine and transmission in proper position in the vehicle. Technician B says a faulty powertrain mount cannot affect throttle linkage. Who is correct?

A

Technician A says spur gears are stronger than helical gears and are often used in heavy-duty vehicles. Technician B says spur gears run more quietly than helical gears. Who is correct?

A

Technician A says an improperly adjusted shift linkage and range sensor can cause the vehicle to start in gear. Technician B says an improperly adjusted shift linkage and range sensor can cause the vehicle to not start. Who is correct?

Both A,B

Technician A says powertrain mounts wear out over time. Technician B says fluid leaks can cause powertrain mounts to get soft and separate. Who is correct?

Both A,B

Technician A says transmission repairs that can be done without removing the transmission include the replacement of external gaskets and seals. Technician B says transmission repairs that can be done without removing the transmission include the replacement of shift solenoids and repairs to the valve body. Who is correct?

Both A,B

In __________, the clutch pedal acts on a master cylinder connected by a hydraulic tube and flexible hose to a slave cylinder mounted on (external type) or in (internal type) the transmission bell housing.

Hydraulic clutch release mechanisms

Which of the following describes torque multiplication in a torque converter?

Is maximum at converter stall

Which of the following is not caused by excessive temperature in the transmission fluid?

Longer fluid life

If a vehicle has a broken powertrain mount, what symptoms might a customer us to describe their concern?

Loud thump when starting from a stop or when braking

Referring to transfer cases, which of the following statements is NOT true?

Power is always directed to both front and rear axles.

In some cable-operated clutch vehicles, which device provides self-adjustment as the clutch disc wears?

Quadrant ratchet

The flywheel is bolted to the _____ of the crankshaft and allows the crankshaft to mate with the transmission via the clutch system.

Rear

Which of the following is most likely to be caused by too cold of a temperature in the transmission fluid?

Reduced lubrication

When the clutch pedal is in the ________ position, power is transmitted to the transmission, and forward or rearward movement of the vehicle can be achieved.

Released

The driven gear in a final drive assembly is the:

Ring gear

Each set of gears, called a gear set, in the transmission provides a certain amount of mechanical advantage and has a specific speed differential associated with it.

T

On a cable-operated clutch control system, the outer cable housing is fixed to the pedal support inside the vehicle and to the transmission bell housing in the engine compartment.

T

The final drive assembly incorporates a set of differential gears arranged so that they sit between two axles.

T

Without the ability to automatically connect and disconnect the transmission from the engine, a vehicle would stall when it came to a stop, much like a manual transmission vehicle will do if the driver forgets to depress the clutch pedal.

True

In a manual transmission, bearings do all of the following, EXCEPT:

increase synchronizer temperature.

The purpose of the final drive assembly is to:

increase torque from the transmission.

Releasing the clutch pedal reapplies the clamping force and reconnects the engine and transmission by firmly clamping the clutch disc between the ______ and the flywheel, allowing them to rotate as a unit.

pressure plate

In a hydraulically operated clutch, all of the following statements are true, EXCEPT:

the master cylinder is connected directly to the clutch fork.

A torque converter center hub is mounted on a one-way clutch and is splined to the transmission stator support shaft.

true

To properly diagnose a problem with an automatic transmission, you need to do a thorough inspection of the transmission and perform several diagnostic tests.

True

When diagnosing an automatic transmission problem, it is important to first verify the customer concern by taking the vehicle on a road test, if possible.

True

Technician A says that the differential assembly provides a means for the inside and outside wheels to turn at different speeds when going around a corner. Technician B says that the differential assembly provides smooth shifts and reduces gear "grinding" by matching gear speeds. Who is correct?

A

When discussing gear ratios, Technician A says total work (force × distance) will be the same regardless of the gear ratio. Technician B says total work increases proportionately when the mechanical advantage is increased. Who is correct?

A

Failed powertrain mounts may cause a loud thumping noise. Which of the following operating conditions might this noise due to bad mounts be most prominent?

All

Linkage-style clutch control systems use a system of _______ between the clutch pedal and the clutch fork.

All

The Powertrain Control Module (PCM) and Transmission Control Module (TCM) have memory that contains the software for the computer. Which of the following is also retained in memory in these modules?

All

Typically, a technical service bulletin (TSB) contains which of the following information?

All

Which components are added to the drive train of a four-wheel drive vehicle compared to a two-wheel drive model?

All

Which of the following can be caused by excessive transmission fluid temperature?

All

Which of the following can be caused by low transmission fluid temperature?

All

Which of the following is required when working on and around hybrid vehicles?

All

A vehicle stalls when coming to a stop. After test-driving the vehicle, it is found that the Torque Converter Clutch (TCC) is remaining engaged as the vehicle slows down. Technician A says that the vehicle probably needs a new torque converter. Technician B says that the TCC solenoid may be sticking and could need replaced. Who is correct?

B

Technician A says that a transaxle must have a type of differential assembly to allow the front wheels to turn at different speeds while driving around a curve. Technician B says that a conventional rear-wheel drive vehicle will typically use a differential assembly that is located in the rear axle assembly. Who is correct?

Both A and B

Technician A says that the torque converter multiplies the amount of torque transmitted from the engine to the transmission. Technician B says that the torque converter couples and uncouples the engine and transmission as the vehicle stops and starts in traffic. Who is correct?

Both A and B

Two technicians are discussing torque converters. Technician A says that a torque converter does a similar job as the manual clutch. Technician B says that the torque converter multiplies torque from the engine to the input shaft of the transmission. Who is correct?

Both A and B

When the engine accelerates, higher impeller speed discharges the fluid across and against the turbine vanes. What happens when the oil strikes the turbine vanes?

Both A and B

A vehicle's axles can be flexible half-shafts, which use constant velocity (CV) joints, as is the case with ______.

Both A,B

Technician A states that whenever possible, you should always test-drive a vehicle to verify the reported problem. Technician B states that before road testing, the transmission fluid level and condition should be checked. Who is correct?

Both A,B

What can be calculated by the Powertrain Control Module by comparing the input shaft speed sensor and output shaft speed sensor?

Both A,B

Which of the following is affected by the gear ratio of the final drive assembly?

Both A,B

Clutch throw-out bearings are usually thrust-type angular-contact ball bearings that are pressed onto a ______.

Carrier

The Powertrain Control Module (PCM) monitors the ________ and the input shaft speed sensor to determine the amount of torque converter slippage and control the lock-up of the Torque Converter Clutch (TCC).

Crankshaft Position (CKP) Sensor

The inner workings of the ______ helps absorb engine vibrations, thus minimizing gear rattle and putting less strain on the drivetrain components.

Dual mass flywheel

Where are transmission in-vehicle diagnosis inspections and tests performed?

During a test-drive

Which of the following is a method of checking engine and transmission mounts?

Either A,C

If a transmission oil cooler ruptures and leaks, which of the following fluids could contaminate the transmission fluid?

Engine coolant

If an automatic transmission has a large amount of oil and dirt on it, locating a fluid leak may require cleaning the transmission case. Which of the following is the best way to clean the case?

Engine degreaser and pressure washer

A gear set in which the input gear has half as many teeth as the output gear has an overdrive ratio.

F

Mechanical advantage can be used to generate a larger output force, but it requires a decrease in the input distance and speed.

F

An automatic transmission fluid leak can result in the failure of the transmission due to a high fluid level.

False

Hydraulic power train mounts use silicone hydraulic fluid that is squeezed back and forth between three chambers, similar to the design of a shock absorber.

False

Performing a check of the fluid level in an automatic transmission is the final step in diagnosing a transmission problem.

False

UV dye should never be used to locate the source of transmission leaks.

False

Which of the following was used to connect the engine crankshaft to the input shaft of early automatic transmissions?

Fluid coupling

Inside a torque converter, the one-way clutch allows the stator to rotate only in one direction. Technician A says that it will turn in the same direction as the output shaft. Technician B says it turns in the same direction as the impeller. Who is correct?

Technician B

Technician A says that the torque converter is mounted between the transmission and the drive shaft. Technician B says that the torque converter is located between the engine and the transmission. Who is correct?

Technician B

When the slave cylinder is located outside the bell housing, which part operates the throw-out bearing?

The clutch fork

When a vehicle travels around a corner or curve, which drive wheel must travel the greatest distance?

The outside wheel

Which of the following provide a large mass to dampen crankshaft vibrations?

The torque converter

Why are helical gears most often used for light-duty passenger vehicles?

They operate very quietly

Why is it important to know the functions of a hybrid vehicle and how it operates?

To know the precautions you should take during operation, service and repair

Which of the following is not an in-vehicle transmission repair?

Torque converter clutch replacement

How will transmission fluid and other fluids coming into contact affect the rubber in the power train mounts?

Transmission fluid will cause the rubber to soften

After installing leak detection dye in an automatic transmission and running the transmission for a few minutes, any leaking dye should be visible with a black light.

True

If the automatic transmission's shift linkage is not adjusted properly, the transmission position indicator will not be set correctly, the customer will not know which gear the vehicle is in, and the backup or reverse lights may not work.

True

Limp-in mode means that even if the computer for the transmission or the part of the PCM that controls the transmission fails, the vehicle will still be driveable.

True

Chrysler Powertrain and Transmission Control Modules calculate a parameter called Clutch Volume Index (CVI). What can the CVI value be used for?

both A,B

The clutch is designed to:

connect and disconnect the transmission from the engine.