Exam 6: Automatic Transmission Fundamentals

Technician A says a multi-disc clutch is an application device in an automatic transmission. Technician B says a one-way roller or sprag is an application device in an automatic transmission. Who is correct?

When turbine speed reaches around 90% of impeller speed, what is the torque multiplication in the torque converter?

Planetary gears are held in place by a:

Technician A says a multi-disc clutch is a holding/application device in an automatic transmission. Technician B says a one-way roller or sprag is a device that typically drives another component in an automatic transmission. Who is correct?

Which of the following describes the operation of the hydraulic control system and gear train in an automatic transmission?

Which of these converts the hydraulic pressure acting on a piston to a mechanical force that is then applied to a brake band?

A(n) ________ is a device with several gears assembled in a compact design.

Which of the following parts is designed to hold a component when it is trying to turn in one direction and allow it to turn freely in the other direction?

Any gear ratio of less than 1:1 is considered: ​

Without the ability to automatically connect and disconnect the transmission from the engine, a vehicle would stall when it came to a stop, much like a manual transmission vehicle will do if the driver forgets to depress the clutch pedal.

Tech A says that the higher the numerical gear ratio (4:1), the more torque will be applied to the wheels. Tech B says that the lower the numerical gear ratio (2:1), the more speed can be obtained at the wheels. Who is correct?

Tech A says that the higher the numerical gear ratio (4:1), the more torque will be applied to the wheels. Tech B says that the lower the numerical gear ratio (2:1), the more speed can be obtained at the wheels. Who is correct?

All of the following statements with respect to automatic transmission are true except:

Tech A says that spur gears create more thrust motion than helical gears. Tech B says that helical cut gears are noisier than straight-cut gears. Who is correct?

All of the following statements with respect to the principles of operation of automatic transmissions are true except:

Tech A says that vehicles with smaller engines require less gear ratios to operate efficiently. Tech B says that manufacturers have been adding more gear ratios in a quest for better fuel economy. Who is correct?

Tech A says that a transaxle assembly includes the transmission and final drive mechanism. Tech B says that transaxles are used for front wheel drive vehicles. Who is correct?

The input shaft is attached to the planetary gear set by one or more clutches, depending on what gear the transmission is in.

Which of the following parts is designed to hold a component when it is trying to turn in one direction and allow it to turn freely in the other direction?

Although none of the automobile manufacturers in the United States are still producing fully hydraulically controlled transmissions, it is still important for automotive technicians to understand how these transmissions operate.