Deck 76: Driveline Diagnosis and Service

Question 1

All of the following statements are true EXCEPT:

A)the side bearings on the differential case are adjusted to a specified preload.
B)if the bearing clearance is too tight, they can fail.
C)a good indication of preload is that your little finger should strain when trying to turn the ring gear.
D)on a Salisbury axle, preload and backlash adjustments are made with hubs.

Answer 1

D

Question 2

Axles are supported on the outside end by the differential side gears.

Answer 2

False

Question 3

The term MOST-Likely used to describe the inner end of a gear tooth is:

A)face
B)plank
C)toe
D)heel

Answer 3

C

Question 4

All of the following statements are true EXCEPT:

A)installing the cross with the zerk fitting backwards will make it difficult, if not impossible, to lube the U-joint after the driveshaft is installed on the vehicle.
B)universal joint lubricant is NLGI #5, with an extreme pressure (EP) additive.
C)sometimes, universal joint cups are held in place with plastic material that is injected into a hole in the yoke.
D)usually galling will be found on a trunnion 180 degrees to brinelling.

Question 5

____________________ measures how far the pinion gear extends into the differential housing.

Question 6

Full-floating axles are found on passenger vehicles.

Question 7

The term MOST-Likely used when terms analyzing gear tooth patterns is:

A)differential
B)pumpkin
C)halfshaft
D)flank

Question 8

The ____ of a gear tooth is the outer end.

A)heel
B)toe
C)plank
D)face

Question 9

The inner bearing race is supported when the bearing is pressed onto the axle.

Question 10

When checking ring and pinion runout, read the backlash at several points around the gear. The maximum variance should be no more than ____.

A)0.002" to 0.003"
B)0.01" to 0.02"
C)0.05" to 0.06"
D)0.06" to 0.08"

Question 11

A(n) ____________________ runs through the center of the tooth from heel to toe.

Question 12

When adjusting a differential, a(n) ____________________ is taken off of the ring gear teeth using colored paste painted onto the teeth.

Question 13

While having a discussion, Technician A says that a good pattern will tend to be toward the toe of the tooth when tested under light load conditions. Technician B says that under heavier load a more complete pattern can be read across the gear tooth. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 14

A vise can be broken if excessive force is used when the jaws are far apart.

Question 15

The ____________________ side of the gear teeth is convex.

Question 16

While having a discussion, Technician A says that noise during acceleration points to heavy heel contact. Technician B says that noise does not usually occur during acceleration. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 17

A problem with driveshaft angles can cause ____________________, which often happens on the ends of the trunnions.

Question 18

Which of the following statements is LEAST-Likely true?

A)The differential and transmission are connected by the spider gear.
B)Gear oil can leak from a differential at the pinion seals, from the cover, from the banjo housing, or from the axle seals.
C)When an axle seal leaks, oil leaks onto the rear brake shoes on that side of the vehicle.
D)A worn or damaged axle bearing can cause bearing noise or a fluid leak.

Question 19

Which of the following statements is LEAST-Likely true?

A)On the drive side of the gear tooth, pulling the pinion gear away from the ring gear (toward the heel of the gear tooth) moves the pattern from the toe flank to the heel face.
B)When the pinion is moved out of mesh, backlash decreases.
C)When the shim is too thin, the drive pinion is moved out of mesh (too far away) from the center line of the ring gear.
D)When the shim is too thick, the drive pinion is too close to the center of the ring gear tooth.

Question 20

Noise from a worn U-joint can include squeaking, clunking, knocking, or grinding sounds.

Question 21

Briefly describe four things you should look for when inspecting a drive shaft?

Question 22

How would you remove the driveshaft?

Question 23

How would you remove a third member from a banjo housing?

Question 24

What could cause damage to differential gears?

Question 25

What is the purpose of moving the ring gear closer to the pinion?