BLOCK D: Drive Line Systems

Question 1

Which of the following adjustment procedures is the correct sequence for adjusting a removable carrier rear-axle drive assembly?

a. Backlash, then pinion gear clearance.
b. Differential pinion clearance, then side bearing preload.
c. Pinion bearing preload, then pinion depth.
d. Side bearing preload, then clutch breakaway torque

Answer 1

c. Pinion bearing preload, then pinion depth.

Question 2

A vehicle has a transfer case problem. Which steps should be followed to ensure a successful repair of the problem?

a. Verify, isolate, and repair the problem, then verify the repair.
b. Isolate, verify and then repair the problem.
c. Isolate and repair the problem, then verify the repair.
d. Verify and repair the problem, then isolate and verify the repair.

Answer 2

c. Isolate and repair the problem, then verify the repair.

Question 3

Which statement is true when repairing automatic transmissions?

a. Cooler lines must be flushed before the transmission is removed.
b. Clutch pack clearances must be measured before replacement.
c. Clutch pack plates are lubricated with Vaseline before installing.
d. Cooler lines must be flushed before the transmission is installed.

Answer 3

d. Cooler lines must be flushed before the transmission is installed.

Question 4

Which statement is true when repairing automatic transmissions?

a. Clutch packs may be pressure tested using high pressure air.
b. Metal contaminated torque converters may be flushed and re-used.
c. Clutch packs may be pressure tested using low pressure air.
d. Metal contaminated coolers may be flushed and re-used.

Answer 4

c. Clutch packs may be pressure tested using low pressure air

Question 5

What test procedures should be followed before deciding that an automatic transmission needs a major overhaul?

a. Change the transmission fluid and filter, stall test, and then pressure test.
b. Stall test, pressure test, and then adjust the bands and pressures.
c. Check fluid levels, pressure test, and then inspect pan deposits.
d. Check fluid levels, inspect pan deposits, and then pressure test.

Answer 5

c. Check fluid levels, pressure test, and then inspect pan deposits.

Question 6

An electronically controlled automatic transaxle will not upshift to drive second. What should the tech do to repair this problem?

a. Replace the torque converter assembly.
b. Remove the transmission and check for burnt or damaged clutch packs.
c. Remove the valve body and repair the 1-2 shift valve assembly.
d. Follow the correct diagnostic procedure using hydraulic diagrams.

Answer 6

d. Follow the correct diagnostic procedure using hydraulic diagrams.

Question 7

A vehicle equipped with an automatic transaxle is not shifting correctly. What is the first diagnostic step?

a. Adjust all the bands to specification.
b. Perform a hydraulic pressure test.
c. Inspect and adjust all linkages.
d. Check the fluid level and type.

Answer 7

d. Check the fluid level and type.

Question 8

Which of the following is the most likely cause for an output shaft seal leak?

a. Transmission fluid level high.
b. Slip yoke worn.
c. A worn tail shaft bushing.
d. A worn rear universal joint.

Answer 8

c. A worn tail shaft bushing.

Question 9

A tech is replacing the universal joints in a two-piece driveshaft. What is the correct procedure for replacing the center joint?

a. Remove the retaining clips, place the companion flange on the vice, then drive the cups out with a hammer by hitting the opposite cup.
b. Remove the retaining clips, then push the cups out using a ball joint press.
c. Cut the yoke to remove the existing u-joints, then press in the cups on the new joint using the vice.
d. Align the two halves of the shaft and index, then remove the joint and install the new one using a press.

Answer 9

b. Remove the retaining clips, then push the cups out using a ball joint press.

Question 10

180 lb-ft is the input at a transfer case input shaft. In low range (1.8:1) ratio, how much torque is delivered to the drive pinion of the front axle of a four wheel drive vehicle?

a. 50 lb-ft
b. 100 lb-ft
c. 162 lb-ft
d. 324 lb-ft

Answer 10

b. 100 lb-ft

Question 11

A torque converter will not cause torque multiplication. What is the problem?

a. The stator is not locking to redirect fluid to the impeller.
b. The stator is locking and redirecting fluid to the impeller.
c. The impeller is being driven at engine speed.
d. The impeller and turbine are being driven at the same speed.

Answer 11

a. The stator is not locking to redirect fluid to the impeller.

Question 12

A shift valve in a hydraulically operated automatic transmission fails to open. What is causing this problem?

a. Throttle pressure is greater than governor pressure and spring force combined.
b. Governor pressure is greater than throttle pressure and spring force combined.
c. Mainline pressure has reached or exceeded maximum value.
d. The torque converter has locked up prematurely.

Answer 12

b. Governor pressure is greater than throttle pressure and spring force combined.

Question 13

An automatic transmission has no reverse and no engine braking in manual first gear range. What is the cause of the problem?

a. The over-running clutch has failed.
b. The forward clutch has burned out.
c. The rear band has broken.
d. The direct clutch is slipping.

Answer 13

c. The rear band has broken.

Question 14

If a multiple-disc holding clutch in an automatic transmission fails, which of the following statements is true?

a. One member of a planetary gear set will not lock to the output shaft.
b. The input shaft will not lock to the torque converter.
c. One member of a planetary gear set will not lock to the transmission case.
d. The output shaft will not lock to the transmission case.

Answer 14

c. One member of a planetary gear set will not lock to the transmission case.

Question 15

How is a forward gear reduction obtained from a simple planetary gear set?

a. The sun gear must be held.
b. The carrier assembly must be the input member.
c. The ring (annulus) gear must be held.
d. the carrier assembly must be the output member

Answer 15

d. the carrier assembly must be the output member

Question 16

A manual transmission is noisy under load in all reduction gears. What is the problem?

a. First speed output gear teeth chipped
b. Clutch shaft pilot bearing is worn
c. Cluster shaft bearings damaged
d. Speedometer drive gear chipped.

Answer 16

d. Speedometer drive gear chipped.

Question 17

Front driveshaft angle 2.5 degrees down from horizontal
Rear driveshaft angle 5 degrees down from horizontal
Rear axle housing angle 5 degrees down from horizontal

a. The front u-joint will be tight; causing clicking.
b. The rear u-joint will cause a vibration.
c. The steady bearing will be loaded; causing premature wear.
d. The joints are all within specified operating angles and will perform as expected.

Answer 17

b. The rear u-joint will cause a vibration.

Question 18

A customer complains of a squeaking noise as the vehicle starts to move. The noise increases frequency about three times faster than the vehicle speed increases. What problem is indicated by this symptom?

a. A worn CV joint
b. An out of phase driveshaft
c. A dry Cardan u-joint
d. A worn steady bearing

Answer 18

c. A dry Cardan u-joint

Question 19

When servicing the wheel bearings on a vehicle with locking hubs, which of the following should be done?

a. clean and lightly coat the hub components with
grease.
b. install new hub cotter pin.
c. install the hubs in the engaged position only.
d. install all new snap rings.

Answer 19

a. clean and lightly coat the hub components with
grease.
[ when servicing 4x4 locking hubs, they should be cleaned and lightly lubricated to ensure smooth and bind-free operation.]

Question 20

Which of the following could cause a very harsh clutch application?

a. scored flywheel surface.
b. worn clutch friction disc.
c. weak and broken torsion springs.
d. heat spots on the pressure plate

Answer 20

c. weak and broken torsion springs.

[torsion or damper spring on a clutch assembly, if worn, weak or broken, will contribute to harsh clutch applications]

Question 21

If a vehicle with electronically controlled transmission will not shift out of 1st gear, which of the is a likely cause?

a. TPS
b. Torque converter.
c. PCS
d. TFTS

Answer 21

a. TPS
[ if the throttle position sensor malfunctions and does not provide the correct signal, the transmission, it is possible the transmission might not shift.]

Question 22

Which of the following is likely to occur if the torque converter stator binds and hangs up?

a. poor acceleration from start.
b. engine stalls at vehicle stop.
c. transmission fluid over cooling.
d. lack of power at highway speeds.

Answer 22

d. lack of power at highway speeds.
[if the stator in a torque converter hangs up and remains locked, at high speed the torque converter will work against itself. at low speed, vehicle may drive normally but causes engine strain at higher speeds]

Question 23

which of the following could cause an electronic automatic transmission to shift hard when hot?

a. incorrect lubricant.
b. defective 1-2 shift solenoid
c. defective pressure control solenoid.
d. plugged filter.

Answer 23

c. defective pressure control solenoid.

Question 24

which of the following could prevent an automatic transmission from shifting into manual-low?

a. low main line pressure.
b. fluid aeration
c. collapse linkage bushing.
d. binding 1-2 shift valve.

Answer 24

c. collapse linkage bushing.

Question 25

Which of the following could cause harsh crunchy shifts in every gear in a manual gearbox?

a. all synchronizers blocking rings are defective.
b. bent shift shafts.
c. broken tooth on reverse idler.
d. incorrect lubricant.

Answer 25

d. incorrect lubricant.

Question 26

if the backlash in a differential is too great, where will the ring gear tooth pattern show?

a. heel.
b. toe.
c. crest.
d. face.

Answer 26

a. heel.

Question 27

When using an oxy-acetylene torch, what PPE and safety equipment is required?

A. Oxy-acetylene goggles, leather gloves and eye wash station.
B. Oxy-acetylene goggles, leather gloves and fire extinguisher.
C. Oxy-acetylene goggles, cotton gloves and fire extinguisher.
D. Oxy-acetylene goggles, cotton gloves and first aid station.

Answer 27

B. Oxy-acetylene goggles, leather gloves and fire extinguisher.