Manuel Transmission Final Exam Review

The last step after installing a replacement CV boot is to________.

"Burp the boot"

All drive shafts are balanced to within

0.5% of the driveshaft weight

Front and rear driveshaft U-joint working angles should be within ________ degrees of each other.

0.5°

A rear-wheel drive 5-speed manual transmission is being discussed. What is the gear ratio when the transmission is in 4th gear?

1 to 1

The maximum allowable difference between the front and rear working angle of a driveshaft is.

1/2 degree

Which series U-joint has the greatest torque capacity?

1480

What is the purpose and function of a transmission.

All of the Above.

In a manual transmission, engine torque is applied to the __________ when the engine is running and the clutch is engaged.

All of the above

What needs to be removed to replace a drive axle shaft from a front-wheel-Drive vehicle?

All of the above

What could be a symptom of a defective U-joint?

Any of the above

What is the relationship between speed, torque, and power?

Both A and C (Torque and speed have an inverse relationship. With a constant speed, transmission torque decreases as output speed increases.

A transfer case is difficult to shift (range shift). Technician A says that the shift linkage or shift fork may be worn or damaged. Technician B says that the blocking ring may be worn or damaged. Which technician is correct?

Both Techs

A transfer case is extremely noisy in all selections except neutral (N) whenever the vehicle is moving.Technician A says the drive chain may be stretched, causing the noise as it hits the inside of the case. Technician B says that one or more of the transfer case bearings could be defective. Which technician is correct?

Both Techs

Technician A says a 4WD transfer case is an auxiliary 2-speed transmission. Technician B says a planetary gearset may provide a low and high range. Which technician is correct?

Both Techs

The backlash is less than specifications (too low). This will cause the ring gear tooth pattern to be to close to the _______

Toe

The drive pinion gear is positioned with a shim that is too thick. This will cause contact with the ring gear teeth too close to the ________.

Toe

What is recommended to install the drive shaft to avoid damage to the hub bearing?

Torque Wrench

A defective (collapsed) engine mount on a front wheel drive vehicle can cause a vibration.

True

A dent in a prop shaft can cause damage that may result in failure when engine torque is applied.

True

Is is recommended by many experts that an air impact wrench not to be used to remove axle shaft buts because the impacting force can damage the hub bearing

True

The type of gears used in a transmission include

all of the above

The outer CV joints used on front-wheel drive vehicles are

fixed type

Drive axle shafts are also called

half shafts

Incorrect or unequal U-joint working angles are most likely to be caused by ________.

A collapsed engine or transmission mount

Which part of a synchronizer is splined to a shaft?

Hub

What part is splined to the clutch disc?

Main Gear

The backlash exceeds specifications. The technician should position the ring gear______

closer to the drive pinion gear

A vibration that is felt in the steering wheel at highway speed is usually due to

defective or out-of-balance front tires

Technician A says that a range shift is used to select high or low gear ratios within the transfer-case. Technician B says that a mode shift is used to select two wheel drive or four wheel drive. Which technician is correct?

Both Techs

Technician A says that a transfer case may use GL-4 gear lube such as SAE 80W-90. Technician B says that a transfer case may use automatic transmission fluid (ATF). Which technician is correct?

Both Techs

Technician A says that a vehicle equipped with part-time four-wheel drive should be driven in four-wheel drive only on slippery surfaces. Technician B says that full-time four-wheel-drive vehicles use a center differential in the transfer case. Which technician is correct?

Both Techs

Technician A says that a vibration felt at highway speeds with the transmission in neutral, is not likely to be caused by the engine. Tech B says that a vibration felt during acceleration could be due to uneven U-joint angles. Which technician is correct?

Both Techs

Technician A says that high frequency vibrations are likely to be heard rather that felt. Technician B says that engine related vibrations vary with engine speed. Which technician is correct.

Both Techs

Technician A says to inspect a suspicious exhaust system when it is warm. Technician B says that dampeners are used with many exhaust systems to reduce vibration. Which technician is correct?

Both Techs

Technician A uses a dial indicator to check a hub flange for runout. Technician B says that excessive runout on a wheel hub flange would cause low frequency vibrations. Which technician is correct.

Both Techs

Two technicians are discussing U-joints. Technician A says that a defective U-joint could cause a loud clunk when the transmission is shifted between Drive and Reverse. Technician B says a worn U-joint can cause a clicking sound when driving the vehicle in reverse. Which technician is correct?

Both Techs

Two technicians are discussing the purpose of a transfer case in a four-wheel-drive system. Technician A says it transfers power to an additional axle. Technician B says some transfer cases have two speeds. Which technician is correct?

Both Techs

Two technicians are discussing the towing of a four-wheel-drive vehicle. Technician A says that the vehicle should be transported on a flatbed truck to avoid the possibility of doing damage to the drive train. Technician B says that the wheels not lifted off the ground by the tow truck should be on a dolly to prevent doing damage to the drive train. Which technician is correct?

Both Techs

Two technicians are discussing torque steer on a front wheel-drive vehicle. Technician A says that equal length drive axle shafts help reduce torque steer. Technician B says that equal drive axle shaft angles help reduce torque steer. Which technician is correct?

Both Techs

When diagnosing a vibration, technician A asks the customer about any recent work that has been preformed on the vehicle. Tech B says that misaligned engine or transmission mounts can cause vibration. Which technician is correct?

Both Techs

The name most often used to describe the universal joints on a conventional rear-wheel drive vehicle drive shaft is

Cardan

A defective outer CV joint will usually make a ________.

Clicking noise

A limited-slip differential has _______ on the side gears that a standard (open) differential does not have.

Clutch packs

Inside the drive axle of a rear-wheel drive vehicle, the ring gear is attached to the ________.

Differential case

A cardan-type U-joint may require what tools to replace

May require any of the above.

Technician A says that the gear ratios of both differentials are typically the same in a four-wheel-drive vehicle.Technician B says that the rear differential may use a slightly higher ratio (lower number) than the front differential. Which technician is correct?

Neither Technician

Two technicians are discussing the front axle disconnect mechanism. Technician A says that the front axles are only disconnected if the vehicle is being towed. Technician B says that this unit is only used on all-wheel-drive vehicles. Which technician is correct?

Neither Technician

The driving gear has 15 teeth and the driven gear has 29 teeth. Technician A says that the output gear will be going faster than the input gear. Technician B says the ratio is 3.86:1. Which technician is correct?

Neither technician A nor B

Measuring driveshaft U-joint phasing involves checking to see if the front and rear U-joint are ______ with each other.

Parallel

What part(s) wears rapidly if a vehicle equipped with an open differential spins one wheel on ice or snow for an extended period of time?

Pinion gear thrust washers

The shim used on a drive pinion gear is used to properly position the gear so that it can correctly mesh with the ________.

Ring gear

The free rotating gears on the main shaft of a RWD manual transmisson are called________ gears.

Speed

The splines of the drive shaft yoke should be lubricated to prevent ________.

Spline bind

A growling sound is heard from the rear of a rear wheel drive vehicle during cornering only. Technician A says that defective rear axle bearings may be the cause. Technician B says that defective drive pinion bearings may be the cause. Which technician is correct?

Tech A

Technician A says full-time 4WD also allows the driver to select 2WD or 4WD. Technician B says part-time 4WD includes a differential or viscous coupling that allows the front and rear axles to rotate at different speeds. Which technician is correct?

Tech A

Technician A says that a vibration felt in the seat may be caused by improper rear wheel balance. Technician B says that a vibration felt in the steering wheel may be caused by a worn clutch throw-out bearing. Which technician is correct.

Tech A

Technician A says that most transfer cases have a built in oil pump. Technician B says that most transfer cases use a heavy grease as a lubricant. Which technician is correct?

Tech A

Technician A says that the convex side of the ring gear is the drive side on most rear axle assemblies. Technician B says that the conveys side of the ring gear is the drive side on differentials used in the front of many four wheel drive vehicles. Which technician is correct?

Tech A

Technician A says that the torque available at the output shaft is greater in second gear than when the transmission/transaxle is in third gear at the same engine speed. Technician B says that the output shaft is rotating faster when the transmission/transaxle is in second gear compared to third gear when the engine is at the same speed. Which technician is correct?

Tech A

Technician A says that tires and wheels are the most common source of low frequency vibrations. Technician B says that engine or transmission mounts are most common source of low frequency vibrations. Which technician is correct?

Tech A

A customer complained of hard shifting particularly into first gear and reverse. Technician A says that the blocking ring maybe worn. Technician B says that the clutch may be defective or out of adjustment? Which technician is correct?

Tech B

A customer complained that the front wheel would skip, hop, and shake while cornering and accelerating at the same time. Technician A says that a fault in the transfer case is the most likely cause. Technician B says that the vibration may be normal if the vehicle is equipped with Cardan U-joints at the front wheels. Which technician is correct?

Tech B

Technician A says only 4WD rear driveshafts are balanced. Technician B says all RWD driveshafts are balanced. Which technician is correct?

Tech B

Technician A says that a vibration in the steering wheel when braking is an indication that the front tires need service. Technician B says that a vibration in the steering wheel when braking is an indication that the front brake rotors need service.

Tech B

Technician A says that if the backlash is okay, then the side bearing preload is also okay. Technician B says that a ring gear tooth pattern check will indicate if the drive pinion depth is correct. Which technician is correct?

Tech B

Technician A says that low frequency vibrations are often not noticed by vehicle occupants. Technician B says that order is defined as the number of vibrations created in one revolution of a component. Which technician is correct.?

Tech B

Technician A says that low frequency vibrations may be heard as a moan or hum. Technician B says that high frequency vibrations may be heard as a moan or hum. Which technician is correct?

Tech B

Two technicians are discussing a dented driveshaft. Technician A says that is should be repaired. Technician B says it should be replaced. Which technician is correct?

Tech B

Two technicians are discussing which lubricants are used in a limited-slip differential. Technician A says to use SAE 80W-140. Technician B says that most vehicle manufacturers usually specify SAE 80W-90 be used with or without special limited-slip additives. Which technician is correct?

Tech B

A Manuel transmission is difficult to shift but only when the outside temperature is below freezing (32°F or 0°C). Technician A says that the brass blocking ring could be defective. Technician B says that incorrect gear lubrication could be the cause. Which technician is correct?

Tech B.

What is the first step in diagnosing noise or vibration complaint.

Test drive to verify the concern

When part-time 4WD vehicles in 4WD are engaged in a turn, which of these occur?

The front wheels travel faster and farther than the rear wheels

A collapsible spacer is used in some differentials to provide______

The proper preload for the drive pinion bearings

A driveshaft can be checked for proper balance by making the circumference of the shaft in four places and running the vehicle drive wheels to spot the point of imbalance using a(n)

strobe light

The proper grease to use with CV joints is

the grease that is supplied with the boot kit.

A rear wheel drive vehicle vibrates when first acceleration from a stop. The vibration is less noticeable at higher speeds. The most likely cause is

unequal U-joint working angles

A vibration is felt in the steering wheel during braking only. A common cause of the vibration is

warped or nonparallel front disc brake rotors