Exam 8: Gears and Shafts

A faulty output shaft will produce vibrations with a change in engine speed.

Technician A says only one gear reduction forward gear can be provided by a single planetary gear set. Technician B says only one reverse gear can be provided by a single planetary gear set. Who is correct?

Technician A says output torque is decreased and output speed is increased when a large gear drives a smaller gear. Technician B says output torque is increased and output speed is decreased when a small gear drives a larger gear. Who is correct?

In the Simpson gear train with the planet carrier as the output, the carrier will always:

Technician A says the sun gear always rotates in the opposite direction to the rotation of the pinion gears. Technician B says the pinions will always follow the same direction as the ring gear when the ring gear and carrier pinions are free to rotate at the same time. Who is correct?

Describe two ways gear reduction is accomplished in a planetary gear set.

What are the four common configurations used as final drive units?

Technician A says a faulty output shaft can cause vibrations. Technician B says an unbalanced torque converter can cause vibrations. Who is correct?

A key difference in a Lepelletier gear set design is that two clutches are applied at the same time.

The sun gear has its teeth on the outer surface.

Technician A says the torque the differential assembly receives from the transmission is multiplied by the ring-and-pinion gear in the differential. Technician B says the purpose of the differential is to allow for equal wheel speed while the vehicle is rounding a corner. Who is correct?

Technician A says when an internal gear drives and is in mesh with an external gear, there will be a speed increase. Technician B says when an external gear drives another external gear, the output gear will rotate in the opposite direction to the input gear. Who is correct?

Technician A says in order to provide additional gear ratios, most transmissions are equipped with more that one planetary gear set. Technician B says that from a single planetary gear set, five forward gear combinations are possible, although some of these combinations are seldom used. Who is correct?

The ____________________ rotates between the ring and sun gear.

​Technician A says Technician A says the Simpson geartrain is an arrangement of a common planetary gearset with two sun gears, two ring gears, and two planetary pinion carriers. Technician B says a Simpson geartrain is the most commonly used compound planetary gearset to provide five reduction gears. Who is correct?

Technician A says when an external gear is in mesh with an internal gear, the two gears will rotate in the same direction. Technician B says there will be a torque increase when an external gear drives and is in mesh with an internal gear. Who is correct?

Technician A says chassis or white lube is suitable for holding thrust washers and bearings in place during reassembly of the transmission. Technician B says when a planetary gear set with blacken gear shafts should be replaced as an unit. Who is correct?

The ____________________ is the outer gear of a planetary gear set.

____________________ is another name for a ring gear.

Describe the neutral position of a planetary gear set.