AUT 141 Final - Manual Transmissions/Transaxles

The Rzeppa CV-joint contains ____ ball bearings.

3 to 6

When a Rzeppa CV joint is modified to become a plunging joint by making the grooves in the inner race longer, it is called a _____.

double-offset CV joint

The resistance to current flow produces _____, which can be measured to determine the amount of resistance.

heat

Geared, torque-sensitive mechanical limited-slip differentials use _____ gears which react to an increase or decrease in torque at one of two shafts.

worm

On 4WD vehicles, all of the following may cause a vibration except:

worm synchronizer ring

Technician A says electronically controlled systems may use sensor inputs to control the center differential for front-rear torque bias. Technician B says the Porsche PTM system uses an electronically controlled motor in the transfer case. Who is correct?

Both A and B

Technician A says magnetism is a source of electrical energy in an automobile. Technician B says a chemical reaction is a source of electrical energy in an automobile. Who is correct?

Both A and B

Technician A says seals that are incorrectly installed can cause a leak in a transfer case. Technician B says noises in a transfer case or a differential can be caused by bad bearings. Who is correct?

Both A and B

Technician A says the amount of torque steer a vehicle is dependent on the length of the axle shafts. Technician B says a factor that affects torque steer is the amount of power the engine produces. Who is correct?

Both A and B

Technician A says the hypoid gearset was designed to lower the body profile. Technician B says hypoid gears provide for smoother and quieter action. Who is correct?

Both A and B

Technician A says the inner race of the Rzeppa CV-joint is connected to the drive axle. Technician B says the ball bearings rotate on a trunnion within the outer housing. Who is correct?

Both A and B

Technician A says the mechanic's style U- joint bearing cups are held in place by metal lock rings. Technician B says some U- joints are held in place by injected nylon locks. Who is correct?

Both A and B

Technician A says the most commonly used type of CV-joint is the ball type. Technician B says it is the Rzeppa type. Who is correct?

Both A and B

Technician A says the purpose of a transfer case is to transfer power to an additional drive axle. Technician B says most transfer cases have two speeds which affect the overall gear ratio of the vehicle. Who is correct?

Both A and B

Technician A says there may be three drive shafts connected to a transfer case. Technician B says one drive shaft is connected to the transfer case, directly from the transmission, and the other two are for driving the front and rear axles. Who is correct?

Both A and B

Technician A says upshift and shift lamps are controlled by the PCM. Technician B says upshift and shift lamps help the driver maximize fuel economy. Who is correct?

Both A and B

Technician A says, upon heavy acceleration, the pinion attempts to climb up the ring gear due to an "equal and opposite" reaction. Technician B says this action attempts to raise the front of the differential housing. Who is correct?

Both A and B

The CV joint boots on the left side of a vehicle appear to be squeezed together; the boots on the right side of the vehicle appear to be stretched apart. Technician A says that one or more of the engine/transaxle's mounts may be broken. Technician B says that one or more of the engine/transaxle's subframe mounts may be broken. Who is correct?

Both A and B

The amount of current being drawn by a load is about to be measured. Technician A says that the ammeter can be connected in the positive side of the circuit. Technician B says that the amperage can be measured by connecting the ammeter to the negative side of the circuit. Who is correct?

Both A and B

A digital ammeter being used to measure current drain is indicating 101 mA. Which of the following represents this reading?

0.101 amps

Shifting between _____ can be done at a stop or while driving at any speed.

4WD-Auto and 4WD-High

A clunking sound is heard from the front of a vehicle whenever it is in motion and the engine is accelerated. Technician A says that a worn inner CV joint could be causing this noise. Technician B says that worn transaxle gears could cause this noise. Who is correct?

A Only

A rear-wheel-drive car exhibits a knocking sound only during turns; the vibration disappears when the vehicle is driven straight. Technician A says that the differential pinion gears may be damaged. Technician B says that the carrier bearings may be worn out. Who is correct?

A Only

An inoperative back-up light circuit is being tested. After the transmission shifter is placed in reverse, a DVOM connected across the terminals of the circuit fuse indicates 12 volts. Technician A says that the fuse is probably blown. Technician B says that the circuit ground is probably faulty. Who is correct?

A Only

Technician A says that balance pads should be checked when checking U-joints because they are sometimes missing. Technician B says that this is not necessary because the balance pads are firmly adhered. Who is correct?

A Only

Technician A says the Universal joint has a center cross with machined arms. Technician B says it has bearing cups that contain a set of ball bearings. Who is correct?

A Only

Technician A says the protective boot on a CV-joint is made of bellows-type neoprene or silicone in some cases to protect against high temperature extremes. Technician B says the boots can be made from ordinary rubber. Who is correct?

A Only

There is excessive end play on an axle shaft of an integral carrier differential (where the shaft is retained in a C-lock). Technician A says that the differential side gear thrust washer may be worn. Technician B says that a worn axle shaft bearing may be the cause of the problem. Who is correct?

A Only

When checking the components of a differential, Technician A says that the maximum allowable runout of a ring gear is about .003 inch. Technician B says that excessive ring gear runout may be caused by a worn pinion gear. Who is correct?

A Only

When discussing CV joint repair, Technician A says that some discoloration of an outer CV joint housing is acceptable. Technician B says that it is acceptable to mix different brands of CV joint grease. Who is correct?

A Only

When discussion rear axle operation, Technician A says that when a car is moving straight ahead, all differential gears rotate as a unit. Technician B says that when a car is turning a corner, the inside differential side gear is locked to the differential case, causing the outside side gear to rotate faster. Who is correct?

A Only

A discussion concerning CV joint testing is being held. Technician A says that a recommended method to check CV joints is to raise the vehicle so that the lower control arms are hanging freely; at this point the engine can be accelerated while noise checks can be performed. Technician B says that the vehicle should be road tested so that the CV joints can be checked under load. Who is correct?

B Only

A half shaft is being removed from a vehicle. The outer CV joint appears to be pressed into the hub. Technician A says that a brass punch or hammer can be used to remove the CV joint from the hub. Technician B says that a puller should be used to remove the CV joint from the hub. Who is correct?

B Only

A vehicle makes a loud clicking sound during a left turn; during a right turn, the clicking noise is still apparent but is less pronounced. Technician A says that the left inner CV joint may be the source of the noise. Technician B says that the left outer CV joint may be causing the noise. Who is correct?

B Only

Dual-clutch transmissions are being discussed: Technician A says these transmissions use a modified torque converter to transfer power from the engine to the transmission. Technician B says dual-clutch transmissions can use either wet or dry clutches. Who is correct?

B Only

Technician A says direct current (DC) flows in two directions. Technician B says alternating current (AC) flows in two directions. Who is correct?

B Only

Technician A says most drive shafts have a slip yoke and three universal joints. Technician B says a drive shaft may vibrate if the balance pads are missing off of the tube. Who is correct?

B Only

Technician A says that there are three designs of axle shaft bearings: ball-type, straight roller, and C-type roller bearings. Technician B says that the three designs are: ball-type, straight roller, and tapered roller bearings. Who is correct?

B Only

The adjustment of the ring and pinion gear set on a shim-style carrier is being discussed. Technician A says that increasing the size of both shims an equal amount will result in a reduction in carrier bearing preload. Technician B says that placing a thinner shim on one side of the carrier and a thicker shim on the other side of the carrier will affect the ring and pinion gear contact pattern. Who is correct?

B Only

The front- and rear-drive shaft angles are being discussed, Technician A says that the angle of the front slip yoke is usually adjusted to match the angle of the rear slip yoke. Technician B says that ideally both the front- and rear-drive shaft angles should cancel each other out. Who is correct?

B Only

When diagnosing a differential noise, Technician A says that a noise heard during deceleration will also be heard on acceleration. Technician B says that a noise heard during acceleration will not necessarily be heard during a coast condition. Who is correct?

B Only

When discussing computer-controlled AWD systems, Technician A says that one of the first steps is to connect a scan tool and retrieve DTCs. Technician B says that after the problem or concern has been verified, the next step in diagnostics is a thorough inspection. TSBs and the vehicle service history should be checked. Who is correct?

B Only

When discussing pinion flange inspection, Technician A says that a groove on the flange sealing surface requires replacement of the flange. Technician B says that excessive runout of the pinion flange could cause a vibration. Who is correct?

B Only

When discussing the procedure for removing a differential unit, Technician A says that the same procedure should be followed on both a removable and integral carrier housing. Technician B says that the axle shafts must be removed before removing the differential case. Who is correct?

B Only

When discussing the proper timing of a ring and pinion gear set, Technician A says that if the gear set does not have timing marks, it is a nonhunting gear set. Technician B says that if that there are timing marks, one tooth of the pinion gear may be grooved or painted and there will be a notch between two ring gear teeth. Who is correct?

B Only

When discussing why a transfer case will not shift into 4WD, Technician A says that the drive chain could be stretched. Technician B says that the transfer case shift motor might be seized. Who is correct?

B Only

When making ring and pinion gear adjustments, Technician A says that a gauge set (arbor and block gauge) can be used to adjust pinion bearing preload. Technician B says that the gauge set can be used to determine the thickness of the pinion gear spacer shim. Who is correct?

B Only

When reviewing the service procedures for CV joints and drive axles, Technician A says that the axle can be used as a slide hammer to help remove a stubborn inboard joint from the transaxle. Technician B says that a drive axle should never be allowed to hang by its own weight during removal or installation. Who is correct?

B Only

While discussing freeze-frame data, Technician A says control systems only store snapshots of emissions-related concerns. Technician B says this data shows the activity of a particular sensor or actuator during the time the computer set a DTC. Who is correct?

B Only

A continuous humming sound is heard from the front of a vehicle when it is in motion; the noise seems to go away when the steering wheel is moved from side to side. Technician A says that a wheel bearing may be worn. Technician B says that an unevenly worn tire could be the source of the noise. Who is correct?

Both A and B

The owner of a vehicle equipped with a limited-slip differential says the differential is making a chattering noise when he makes a right- or a left-hand turn. Technician A says that the differential fluid may need to be replaced. Technician B says that the fluid used in limited-slip differentials is different from the fluid used in conventional differentials. Who is correct?

Both A and B

When diagnosing a vibration that becomes greater with vehicle speed, Technician A says that the tires may be out of balance. Technician B says that the drive shaft may be out of balance. Who is correct?

Both A and B

When diagnosing the cause of noise from a transfer case, Technician A says that incorrect tire size could be the cause. Technician B says that a faulty bearing or gear could be the cause. Who is correct?

Both A and B

When discussing differential action, Technician A says that when a car is making a turn, the outside wheel must turn faster than the inside wheel. Technician B says that a locked differential may cause the car to slide around a turn. Who is correct?

Both A and B

When discussing electrical checks on 4WD systems, Technician A says that if the circuit's fuse is blown, check for a short in the wiring or solenoids. Technician B says that if there is power to a solenoid but it does not work, the solenoid may be sticking. Who is correct?

Both A and B

When discussing gear ratios, Technician A says that they express the number of turns the driven gear makes compared to one turn of the drive gear. Technician B says that the gear ratio of a differential unit expresses the number of teeth on the ring gear divided by the number of teeth on the pinion gear. Who is correct?

Both A and B

When discussing how other vehicle problems can affect U-joint failure, Technician A says that raising the suspension height of a vehicle excessively could result in premature U-joint failure. Technician B says that a very high engine idle speed setting could cause excessive U-joint wear. Who is correct?

Both A and B

When discussing resistance, Technician A says that current will increase with a decrease in resistance. Technician B says that current will decrease with an increase in resistance. Who is correct?

Both A and B

While discussing vehicle speed sensor tests, Technician A says use an ohmmeter to test the resistance of the coil. Technician B says the voltage generated by the sensor can be measured by connecting a voltmeter across the sensor's terminals. Who is correct?

Both A and B

A _____ is used to transfer a uniform torque and a constant speed while operating through a wide range of angles.

CV joint

_____ is a synthetic oil with magnetic particles, such as iron, suspended in it.

MR Fluid

The normal, sport, and super sport shifting modes are found in the _____.

Mitsubishi SST

A differential is being assembled. Technician A says that carrier bearing preload must be adjusted prior to making the pinion gear depth adjustment. Technician B says that if the pinion bearing preload is excessive, the pinion nut will need to be backed off until the correct preload is reached. Who is correct?

Neither A nor B

Technician A says both MG1 and MG2 are used to power the drive wheels in a Toyota hybrid drive system. Technician B says only MG1 is used to drive the wheels. Who is correct?

Neither A nor B

The diagnosis of a limited-slip differential is being discussed. Technician A says a chattering sound while the vehicle is going straight indicates that the clutches are slipping. Technician B says that an inch-pound torque wrench can be used to check breakaway torque. Who is correct?

Neither A nor B

The resistance of an electromagnetic clutch coil is 200 ohms; it should be 4 ohms. Technician A says that this will result in a blown fuse. Technician B says that the magnetic field developed by the clutch coil will be excessive. Who is correct?

Neither A nor B

When checking the pattern of a gear set, Technician A says that the markings on the coast side of the tooth are the most important. Technician B says that if the marking is toward the outside diameter of the ring gear, it is referred to as being toward the toe of the gear. Who is correct?

Neither A nor B

When discussing drive shaft problem diagnosis, Technician A says that worn U-joints will cause a vibration that is very speed sensitive: the faster the vehicle is traveling the greater the vibration will be. Technician B says that an unbalanced drive shaft will cause a vibration that is most noticeable at low speeds. Who is correct?

Neither A nor B

When discussing sealers and leak diagnosis, Technician A says that when using silicone sealer to seal a differential housing cover, a bead that is at least ½ inch wide should be used. Technician B says that silicone sealer can be used to repair a porous differential housing. Who is correct?

Neither A nor B

When discussing the different designs of rear axles, Technician A says that the bearings for full-floating shafts are located within the axle tubes of the rear axle housing. Technician B says that C-type retainer axles are held in place by a pressed retainer ring against the axle bearing. Who is correct?

Neither A nor B

When examining a pinion gear, a marking "+2" is found on the small end of the gear, Technician A says that this indicates that the gear has been remanufactured. Technician B says that this indicates that 0.002 inches should be added to the measured nominal pinion depth shim. Who is correct?

Neither A nor B

When servicing a CV joint, Technician A says that if the boot of a CV joint is not leaking grease, then the joint must be in good condition. Technician B says that one of the first steps in CV drive axle removal is to drain the transaxle after the vehicle has been raised. Who is correct?

Neither A nor B

While discussing axle hub nuts, Technician A says that all axle nuts are torqued to the same specification. Technician B says the best way to install an axle hub nut is with an air impact. Who is correct?

Neither A nor B

A vehicle towed into the shop because of a no-start condition is found to have an inoperative starter. A voltmeter connected to both of the terminals of the clutch safety switch indicates 8 volts when the clutch pedal is depressed and the ignition switch is placed in the Start position. Technician A says that the clutch safety switch is faulty. Technician B says that the resistance of the circuit is higher than normal. Who is correct?

Both A and B

A voltmeter that is connected across the power and ground terminals of an operating motor indicates 7.5 volts. Technician A says that there may be a problem in the ground side of the circuit. Technician B says that the power supply of the circuit may be faulty. Who is correct?

Both A and B

Technician A says a diode allows current to flow in only one direction. Technician B says transistors are semiconductor switching devices. Who is correct?

Both A and B

In normal automotive terms, suspension spring compression is called jounce, while the expansion of the suspension spring is called _____.

Rebound

Which statement concerning turning a corner with a 4WD system is correct?

The rear wheels move through a wider arc than the front wheels. (The front wheels travel a greater distance than the rear wheels.) The right rear wheel travels the greatest distance. The left rear wheel travels the greatest distance.

Motor generator 1 (MG1) and Motor generator 2 (MG2) are components found in _____.

Toyota and Lexus hybrids

(T/F) A differential is needed between any two drive wheels, whether in a RWD, FWD, all-wheel drive (AWD), or four-wheel drive (4WD).

True

(T/F) Backlash is the clearance or play between two gears in a mesh.

True

What unit contains a constant-mesh, six-speed manual transaxle with wet clutches?

Volkswagen DSG

The main source of electrical power for a vehicle is stored in the _____.

battery

The differential case is mounted on _____ so that it is able to rotate independently of the drive axles.

bearings

A _____ consists of two individual U-joints connected by a centering socket yoke and a center yoke that functions like a ball and socket.

double cardan universal joint

The basic purpose of the universal joint is to allow the _____.

drive angle between two parts of the drive train to change.

_____ are often used to link the input and output shafts in a transfer case and serve as a link that does not influence gear ratios.

drive chains

Many automotive components, such as alternators, ignition coils, starter solenoids, and magnetic pulse generators operate using principles of _____.

electromagnetism

The size of the pulleys in a CVT is _____ controlled to select the best overall drive ratio based on throttle position, vehicle speed, and engine speed

electronically

The _____ is the final set of reduction gears the engine's power passes through on its way to the drive wheels.

final drive

The bearing of a _____ is located on the outside of the housing which places all of the vehicle's weight on the axle housing with no weight on the axle.

full-floating rear axle

_____ express the number of turns the drive gear makes compared to one turn of the driven gear it mates with.

gear ratios

What part is used to prevent the lubricant from leaking out of the housing of a straight roller axle bearing?

grease seal

The short drive shafts or axles used on front-wheel drive (FWD), four-wheel drive (4WD), and rear-wheel drive (RWD) with independent rear suspension are called _____.

half shafts

Which of the following is not a typical electrical problem?

high resistance in the circuit an open circuit a shorted circuit (a closed circuit)

The main types of _____ are torque sensitive, speed sensitive, or mechanically locked.

limited-slip differentials

Preload in bearings eliminates _____.

looseness

A _____ gearset is one in which any one pinion tooth comes into contact with only some of the ring gear teeth. One revolution of the ring gear is required to achieve all possible gear tooth contact combinations.

nonhunting

A 4WD vehicle may be shifted into four-wheel drive _____.

only according to the owner manual's instructions

A _____ gearset is one in which any one pinion tooth comes into contact with only some of the ring gear teeth, but more that one revolution of the ring gear is required to achieve all possible gear tooth contact combinations.

partial nonhunting

A(n) _____ is an electric switch which allows a small amount of current to control a much larger one.

relay

The Spicer style, mechanic's style (aka Detroit/Saginaw style), and the Cleveland style are styles of _____.

single universal joints

A CVT without a torque converter may use a(n) _____.

start clutch

If a CVT is equipped with five or six predetermined pulley stops in the transmission, it is known as a(n) _____.

stepped transmission

What is the central gear in a planetary gearset around which the rest of the gears rotate?

sun gear

A _____ is a geared, torque-sensitive mechanical limited-slip differential that uses worm gears to "sense" torque on one shaft.

torsen

Most drive shafts in a front-engine, rear-wheel drive car have at least _____.

two universal joints

The _____ hybrid system, found in GM, BMW, and DaimlerChrysler vehicles, relies in advanced hybrid, transmission, and electronic technologies to improve fuel economy and overall vehicle performance.

two-mode

Failure to index the driving and driven yokes of the rear U-joint before removal could result in which of the following?

vibration

Which of the following clutches serves to reduce friction, limits the production of heat, improves overall performance, increases the life of the clutch assembly, and is capable of handling large amounts of torque?

wet clutch

While discussing the cause of an oil leak in an axle housing, Technician A says if the fluid leaks past the threads of the drive pinion nut, the leak can be corrected by installing a copper washer under the nut. Technician B says fluid leakage past the stud nuts that hold the carrier assembly to the axle housing can be corrected by applying thread or gasket sealer on the threads and tightening the nuts to specifications. Who is correct?

Neither A nor B

When reviewing the procedure for setting backlash, Technician A says that backlash can be adjusted along with side bearing preload by loosening or tightening side bearing adjusting nuts. Technician B says that to decrease the amount of backlash, a thinner shim is normally installed on the ring gear side of the case and a thicker shim installed on the other side. Who is correct?

A Only

While diagnosing the cause of a squeaking sound coming from the driveline, Technician A checks for a dry or worn U-joint. Technician B checks for excessive clearance between the slip joint and the extension housing bushing. Who is correct?

A Only

While discussing the reasons for DTC that denotes a communication problem, Technician A says the individual control modules are not able to communicate with each other. Technician B says the scan tool is unable to communicate with each control module. Who is correct?

A Only

While servicing a differential, Technician A says a special additive should be used in clutch-type limited-slip differentials. Technician B says to fill the differential approximately one inch below the opening to avoid foaming. Who is correct?

A Only

_____ systems automatically react to normal or slippery road conditions and are not designed for off-road use; rather, they are designed to increase vehicle performance in poor traction situations.

AWD

The _____ contains a seven-speed computer-controlled unit called Drivelogic which carries out all shifts with no interruption of power flow.

BMW M-DCT

DCTs were first put into production by _____.

Borg Warner

When discussing the retention of axle shafts, Technician A says that some axle shafts are retained in the housing by a plate and bolts. Technician B says that some axle shafts are retained in the housing by a C-washer or clip. Who is correct?

Both A and B

When installing a new U-joint, one bearing cup fits into the slip joint easily, while the other needs extreme force to put it in place, Technician A says that the slip yoke may need to be replaced. Technician B says that the U-joint may be the wrong one for the application. Who is correct?

Both A and B

While checking ring gear runout, Technician A says excessive runout requires the ring gear to be removed and a separate runout check must be made on the case. Technician B says if case runout is within specifications, the ring and pinion must be replaced. Who is correct?

Both A and B

While diagnosing an output in an electronic control system, Technician A says actuators that are duty cycled are best tested with a scan tool. Technician B says some scan tools allow a technician to energize and de-energize individual actuators so the technician can observe the activity. Who is correct?

Both A and B

While discussing a relearn procedure following a component replacement, Technician A says that driving the vehicle under recommended conditions can reset the computer to the basic factory programming. Technician B says that a scan tool can be used to complete the relearn procedure. Who is correct?

Both A and B

While discussing the behavior of electricity, Technician A says that the amount of current which flows in a circuit is determined by the resistance in the circuit. Technician B says that as resistance goes up, the current goes down. Who is correct?

Both A and B

_____ occur when opposing operating angles of two Universal joints cancel the oscillations developed by the individual Universal joint.

Canceling angles

What term describes the rotational speed at which an object begins to vibrate as it turns?

Critical Speed

The _____ assembly transmits torque from the engine and transmission to drive the vehicle's wheels.

Drive axle

A(n) _____ is a fully automated, manual transmission with two computer-controlled clutches.

DCT

Controller area network (CAN) components are used in _____ to interconnect the network of electronic control modules.

Ford hybrids

The control unit of a(n) _____ relies on inputs available on the CAN bus, plus four distance sensors, two pressure sensors, and two engine-speed sensors to choose the correct gear and shift timing.

Porsche Dual Klutch/Doppelkupplung

CV-joints come in a variety of types which can be referred to by ____.

Position, function, or design

_____ are used in antilock brake systems to measure the speed of the wheels.

Wheel speed sensors

All vehicles sold in the United States after 1971 are required to have _____.

back-up (reverse) lights

Full-time four-wheel drive _____.

is never disconnected

Part-time four-wheel drive _____.

is usually disconnected when driving on pavement

A viscous clutch, cone clutch, or a multiple-plate clutch are three types of clutches that may be used in a(n) _____ differential.

limited-slip center

The _____, often referred to as the interaxle differential, allows the front and rear wheels to turn at different speeds and with different amounts of torque.

center differential

The _____ prevents the engine starting unless the clutch pedal is fully depressed.

clutch safety switch

Like the Rzeppa CV joint, the ____ uses six balls in a cage and inner and outer races.

cross-groove CV joint

The teeth of a hypoid gear are _____, causing a wiping action when meshing.

curved to follow a spiral