AUT-128 final exam

Which of the following gear ratios shows an overdrive condition?

0.85:1

Blocking rings are being discussed. Technician A says that during a gear shift, the blocking ring is pushed into the speed gear cone by the shifter plates or keys. Technician B says the blocking ring eliminates friction between the cone shaped surface on the speed gear and the synchronizer assembly. Who is correct?

a only

Technician A says when a small gear drives a larger gear, output speed is decreased. Technician B says when a small gear drives a larger gear, output torque is decreased. Who is correct?

a only

Technician A uses a gear puller to remove ball bearings from the main shaft. Technician B uses a pin punch. Who is correct?

a only

The owner of a car complains that the gears grind when shifting into reverse. Technician A says the clutch has excessive free play. Technician B says there could be oil on the clutch disk facing. Who is correct?

a only

Transaxle R&R is being discussed. Technician A says in some cases, flange-mounted drive shafts may be left attached to the wheel and hub assembly and only unbolted at the transmission flange. Technician B says never separate the lower ball joint from the steering knuckle as this may cause wheel alignment problems. Who is correct?

a only

While discussing the shift linkage of a typical five-speed transmission, Technician A says three shift rails are needed. Technician B says only the center shift rail is machined with interlock and detent notches. Who is correct?

a only

A humming or growling noise in the front of the vehicle that changes with road speed could be caused by ______.

all answers are correct

Axle shafts with CV joints at each end are found on the ______.

all answers are correct

Gears can _____.

all answers are correct

In an automatic AWD vehicle, normally one axle receives all the torque; when slippage occurs, 50 percent of the torque can be sent to the other axle by _____ means.

all answers are correct

The bearing cups of a conventional U-joint are retained by ______.

all answers are correct

When the vehicle is turning left, ______.

all answers are correct

Which of the following could cause a clutch pedal pulsation?

all answers are correct

Technician A says if the dog (clutch) teeth of the synchronizer are rounded, the synchronizer should be reused. Technician B says the movement of the synchronizer sleeve on the shaft should be checked. Who is correct?

b only

Shift linkages are being discussed. Technician A says cables are used to connect the shift lever to the transmission. Technician B says rods are used to connect the shift lever to the transmission. Who is correct?

both a and b

Technician A checks the transmission mounts by pushing up and down on the transmission while observing the mounts. Technician B says if the case moves up but not down, the mounts require replacement. Who is correct?

both a and b

Technician A says a double-offset plunging-style CV joint uses a cylindrical outer housing with straight grooves. Technician B says a double-offset plunging-style CV joint is a compact design. Who is correct?

both a and b

Technician A says an all-wheel drive vehicle uses a differential at both axles. Technician B says some four-wheel drive vehicles use an interaxle differential. Who is correct?

both a and b

Technician A says limited slip differential clutch packs are designed to slip slightly when the vehicle is turning. Technician B says pressure is kept on the clutch packs by either an S-shaped spring or coil springs. Who is correct?

both a and b

Technician A says mismatched tire sizes can cause transfer case noise. Technician B says incorrect tire inflation pressure can cause transfer case noise. Who is correct?

both a and b

Technician A says spur gears have straight cut teeth. Technician B says helical gears have teeth cut at an angle. Who is correct?

both a and b

Technician A says the clutch assembly is located between the engine and the transmission. Technician B says the clutch provides a mechanical coupling between the engine flywheel and the transmission input shaft. Who is correct?

both a and b

Technician A says the outboard CV joint allows torque to be transmitted through a working angle of up to 20 degrees as the suspension moves up and down. Technician B says the CV joint transmits torque to the front wheels at an angle of up to 40 degrees as the vehicle is steered right and left. Who is correct?

both a and b

Technician A says the outer CV joints of FWD axle shafts are nine times more likely to need replacement than the inner joints. Technician B says a worn cage or race can cause a clicking sound during a turn. Who is correct?

both a and b

Technician A says the transmission output shaft seal is prone to leakage. Technician B says a worn transmission rear bushing may contribute to output shaft seal leakage. Who is correct?

both a and b

Technician A tests for clutch slippage on a road test. Technician B tests for clutch slippage in the shop by engaging the clutch with the transmission in third gear while the vehicle is stationary. Who is correct?

both a and b

Two technicians are discussing transfer case shifting mechanisms. Technician A says the transfer case range is controlled by a shifter lever and mechanical linkage. Technician B says the transfer case range is controlled electrically by a switch on the dash and an electric motor on the case. Who is correct?

both a and b

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

excessive crankshaft endplay

A shudder or vibration only when accelerating is most likely caused by ______.

excessive play in the inboard plunge joint

To reduce gear whine, manufacturers use _____ gears.

helical

When a large gear drives a smaller gear, the output speed _____.

increases and torque decreases

When installing a ball bearing that is a press fit [tight] onto the main shaft, pressure should be applied to the _____ race.

inner

Technician A says a transmission noise is caused by something internal if it is most noticeable during a test drive. Technician B says the noise is caused by the clutch if the noise disappears when the clutch is disengaged. Who is correct?

neither a nor b

Technician A says an oil-soaked clutch disc cannot cause clutch chatter. Technician B says clutch chatter cannot be caused by loose bell housing bolts. Who is correct?

neither a nor b

In a viscous clutch, when the silicone fluid is heated, it ______.

stiffens

Under what conditions should the interaxle differential be locked?

when driving in snow or off road at low speed

If the 4WD indicator light is flashing on and off, ______

a fault code is stored in the 4WD system

Differential gearsets are being discussed. Technician A says the inside bore of the side gears is splined and mates with splines on the ends of the axles. Technician B says the differential pinion gears and side gears are in constant mesh. Who is correct?

both a and b

Final drive ratios are being discussed. Technician A says that the final drive ratio is the gear ratio of the ring gear and pinion gear in a rear axle. Technician B says the final drive ratio is the gear ratio of the pinion gear and ring gear in a transaxle. Who is correct?

both a and b

Which of the following is NOT a function of the flywheel?

Splines on the flywheel hub transfer torque to the transmission input shaft

Technician A says that a leaking clutch master cylinder primary seal will cause fluid to leak onto the clutch pedal and driver's footwell. Technician B says that a leaking clutch master cylinder secondary seal will not show externally but will cause the pedal to be low and spongy. Who is correct?

neither a nor b

Locking hubs are generally found on ______.

older SUVs and pickup trucks with part-time 4WD

In a self-adjusting-type cable clutch mechanism, the adjusting mechanism is located ______.

on top of the clutch pedal

Full floating axle shafts are found on ______.

rear axle of a heavy duty truck

When an idler gear is placed between the driving and driven gear, the driven gear _____.

rotates in the same direction as the driving gear

CV joints are lubricated with ______.

special high-temperature, high-pressure grease made specifically for CV joints

A ratcheting sound from an automatic locking hub may be caused by ______.

the hub on the opposite side of the axle not disengaging

A _____-type limited slip differential uses a set of helical gears to transfer torque from the wheel that is slipping to the wheel with traction.

torsen

A clicking noise during transmission/transaxle operation may be an indication of ______.

worn, broken, or chipped gear teeth