303Ja

Question 1

What are the five (5) functions of the drive axle assembly?

Answer 1

a) The drive axle assembly must withstand and support the weight of the vehicle
and load
b) The drive axle assembly provides a gear reduction in the basic vehicle
powertrain.
c) The drive axle assembly must change the direction of torque by 90°.
d) The drive axle must transfer torque evenly between the two wheel assemblies
e) The operator is able to lock the wheel ends in a low traction situation.

Question 2

The main function of the carrier housing is to

Answer 2

hold the internal gear components.

Question 3

The pinion bearing cage is always a removable component of the carrier housing.

Answer 3

false;

Question 4

The overhung pinion differs from the straddle mount in that it has a short stub that
extends past the end of the pinion gear.

Answer 4

false;

Question 5

The input drive pinion is in constant mesh with the:

Answer 5

bevel gear.

Question 6

What is the main purpose of the thrust screw?

Answer 6

The thrust screw prevents the bevel gear from deflecting away from the input pinion
during heavy torque loads.

Question 7

The bevel gear is bolted directly to the:

Answer 7

flanged case half.

Question 8

The differential pinions are driven by the:

Answer 8

cross shafts.

Question 9

The most common differential carrier assembly used today is the:

Answer 9

single speed single reduction.

Question 10

Which components are attached to the drive axle housing?

Answer 10

all of the above

Question 11

Number the following components in the path-of-power through the single speed,
single reduction carrier assembly. Begin with the input shaft yoke and end with the
wheel assemblies.

Answer 11

. input shaft yoke 1
differential cross shaft 5
differential case 4
axle shafts 8
input drive pinion 2
bevel gear 3
axle side gears 7
differential pinions 6
wheel assemblies 9

Question 12

The torque available to the wheel with good traction in a wheel spin condition is:

Answer 12

the same as the torque to the spinning wheel.

Question 13

When a vehicle is turning a corner, the differential assembly allows the:

Answer 13

outer drive wheel to rotate faster than the inner drive wheel.

Question 14

Semi-floating axle shafts can be removed from a vehicle when the weight of the vehicle is on the drive wheels.

Answer 14

false;

Question 15

Transfer cases always incorporate a differential to allow for a difference in speed
between the two output shafts

Answer 15

false;

Question 16

. A planetary differential allows for torque to be proportioned between its outputs

Answer 16

true;

Question 17

. Why is it preferable to allow the operator control over the differential lock?

Answer 17

To minimize tire spin and maximize traction in low traction conditions, but to also allow differential action in high traction conditions and while hauling at higher
speeds.

Question 18

True or false

The axle spider gears are able to rotate at different speeds then the case when required?

Answer 18

True

Question 19

What are some identification numbers you can find stamped on pinion and bevel gears?

Answer 19

Steel he code, part number, matched set number, manufacture date, tooth combination.

Question 20

What’s the formula for gear ratio?

Answer 20

Drive

Question 21

True or false

The differential assembly will always deliver the same amount of torque to each wheel

Answer 21

True

Question 22

What’s the formula for bevel gear speed

Answer 22

   2

Question 23

What is the purpose of a no-spin differential?

Answer 23

It drives both wheels at the same time at the same speed.

Question 24

The no-spin differential can not take corners. T/F

Answer 24

True. The unit disengages to allow the outer wheels to turn faster.

Question 25

What assists with the outer faster wheel speed?

Answer 25

When the outer wheels turn faster, it overcomes a tapered clutch. A spring puts the clutch back into place when the outer wheels reach the same speed as the inner rings.

Question 26

What percentage of the weight of the equipment and load is carried by a full-floating axle?

Answer 26

Zero percent.

Question 27

The common arrangement for a planetary final drive is input on the carrier, output on the internal gear and the sun is held.(T/F)

Answer 27

False.

Question 28

What component of a drive axle provides a framework for mounting the carrier assembly and all of the attached components?

Answer 28

The axle housing.

Question 29

What is the opening in an axle housing where the carrier assembly is installed?

Answer 29

The bowl.

Question 30

The term GAWR means?

Answer 30

Gross axle weight rating

Question 31

For transfer cases with a standard interaxle differential, torque is split equally between the front and rear drive shafts. T/F

Answer 31

True