Exam 44: Four- and All-Wheel Drive

What is the disadvantage of manual locking hubs?

Interaxle differential construction is being discussed. Technician A says some are designed with a multiple-disc clutch pack. Technician B says cone brake clutches are not used. Who is correct?

Helical center differentials are often referred to as Torsen units.

Which step does not need to be taken before removing the transfer case?

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.

Where is a viscous clutch used?

If additional torque is required at all four wheels in a 4WD vehicle, the gear selector should be placed in the ____________________ position.

On what type of vehicle(s)is part-time 4WD used?

On-demand AWD systems engage the front and rear axles on an as-needed basis.

Front hubs on 4WD vehicles are being discussed. Technician A says that some front hubs lock automatically. Technician B says that some front hubs must be manually engaged. Who is correct?

Helical limited slip differentials are designed to offer an unequal torque bias.

The Haldex clutch in the all-wheel drive automatic transaxle takes the place of the ______.

Two technicians are discussing the difference between 4WD and AWD. Technician A says AWD does not have an interaxle differential lockout. Technician B says AWD does not have a low range. Who is correct?

When a difference in speed of ____________________ percent exists between the input and output of a viscous  clutch, it will lock the input to the output.

Which component is NOT found in a transfer case ?

A 4WD transfer case engaged in 2-high or 4-high always provides power to the ____________________ wheels.

Which 4WD transfer case shift position should be used for climbing steep hills when driving off-road?

Selective ____________________ are used to set the transfer case shaft assembly end play.

When should the interaxle differential lockup be applied?

For most driving conditions, the transfer case gear selector in a 4WD vehicle should be in the ____________________ position.