Exam 44: Four- and All- Wheel Drive

A transfer case is constructed somewhat similarly to a manual ____________________.

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

All-wheel drive vehicles may be switched to two-wheel drive by activating the mode switch.

Part-time 4WD is found on what type of vehicle?

Locking hubs are generally found on ______.

Technician A says an interaxle differential can lower performance in poor traction conditions. Technician B says many 4WD vehicles use an interaxle differential in the transfer case to eliminate driveline windup during turns. Who is correct?

The result of having a different gear ratio in the front axle than in the rear axle will cause a phenomenon called driveline ____________________.

The TCM [transmission control module] controls the application of the viscous clutch in a transfer case.

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

When the plates of a viscous coupling (clutch) rotate at different speeds, the plates ____________________ the fluid.

What is the main advantage of all-wheel drive?

Describe the operation of a viscous clutch.

Which of the following components is NOT part of a viscous clutch assembly?

Technician A says part-time 4WD vehicles do not have an interaxle differential. Technician B says part-time 4WD vehicles do not have a transfer case. Who is correct?

Technician A says viscous couplings are electronically controlled. Technician B says Haldex clutches are electronically controlled. Who is correct?

All-wheel drive vehicles may use a viscous clutch, rather than a transfer case, to drive the axle with low tractive effort.

The wheel bearing locknuts on most 4WD vehicles require the use of a ______.

A vacuum leak could prevent a vehicle from engaging 4WD.

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

Technician A says wheel bearings on 4WD vehicles are permanently sealed and lubricated and do not require disassembly and service after the hubs have been submerged in water. Technician B says a frequent cause of wheel bearing failure is the use of oversized tires mounted on wheels with substantial offset. Who is correct?