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Exam 7: Differentials and Drive Axles Servicing Differentials and Drive Axles

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Question 1

Multiple Choice

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Preload in bearings eliminates _____.

A) torque
B) pressure
C) breakage
D) looseness

E) None of the above
F) All of the above

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Question 2

True/False

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Backlash is the clearance or play between two gears in a mesh.

A) True
B) False

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Question 3

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What is meant by the term axle ratio?

What part is used to prevent the lubricant from leaking out of the housing of a straight roller axle bearing?

What type of gearset allows the drive shaft to be positioned low in the vehicle because the final drive pinion gear centerline is below the ring gear centerline?

The _____ is the final set of reduction gears the engine's power passes through on its way to the drive wheels.

When engines are placed longitudinally in the car, they are said to have "north/south" placement.

The main types of _____ are torque sensitive, speed sensitive, or mechanically locked.

What is bolted to the axle and contains all of the information needed to identify the axle for diagnosis and service?

What is the difference between a live axle and a dead axle?

What is the metal unit encasing the differential side gears and pinion gears to which the ring gear is attached?

RWD final drives normally use a hypoid ring and pinion gearset that turns the power-flow 45 degrees from the drive shaft to the drive axles.

The overhung-mounted pinion has three bearings supporting the pinion.

At least four bearings are found in all differentials: one over the drive pinion shaft with the other three supporting the differential case.

Geared, torque-sensitive mechanical limited-slip differentials use _____ gears which react to an increase or decrease in torque at one of two shafts.

The differential case is mounted on _____ so that it is able to rotate independently of the drive axles.

The teeth of a hypoid gear are _____, causing a wiping action when meshing.

A _____ gearset is one in which any one pinion tooth comes into contact with only some of the ring gear teeth. One revolution of the ring gear is required to achieve all possible gear tooth contact combinations.

Technician A says that there are three designs of axle shaft bearings: ball-type, straight roller, and C-type roller bearings. Technician B says that the three designs are: ball-type, straight roller, and tapered roller bearings. Who is correct?

_____ express the number of turns the drive gear makes compared to one turn of the driven gear it mates with.