Exam 6: Automatic Transmission Fundamentals

Tech A states that most automatic transmissions use pneumatic pressure to apply individual clutches and bands. Tech B states that most automatic transmissions use hydraulic pressure to apply individual clutches and bands. Who is correct?

When an engine is operating under light load, engine manifold pressure is high.

Planetary gears are held in place by a:

Any gear ratio of less than 1:1 is considered an overdrive ratio. Overdrive ratios are typically used to:

The transmission needs to be able to adapt the engine torque to meet the _________ demands of the vehicle.

Which of these are often used to change the direction of power flow 90 degrees?

Which of the following is specifically used to hold one member of the planetary gear set stationary?

Apply devices, such as clutches and brakes, either drive or stop members in a planetary gear set in order to create the needed gear ratio.

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?

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

Which of the following is NOT a holding device used in an automatic transmission?

Which type of automatic transmission use multi-plate clutches and bands applied by hydraulic pressure?

Tech A says that bands allow components to freewheel in one direction, and lock up in the other direction. Tech B says that sprags are stronger than one-way rollers. Who is correct?

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

Which of the following pressures is not used in reverse, because there is only one speed available?

Which of the following transmission designs uses multidisc clutch packs replace to synchronizer assemblies, which would be in a manual transmission, to lock the individual gears onto the main shaft?

When a gear is selected in an automatic transmission, the input shaft becomes locked to the output shaft of the transmission through which of the following?

What is the purpose of a vehicle's transmission?

Given the number of automatic transmission vehicles being produced, it is valuable for all technicians to have a working knowledge of automatic transmission fundamentals, even if they may never rebuild a transmission while working in the automotive field.

Tech A says that dog clutches are used on most automatic transmissions. Tech B says that all transmissions utilize helical cut gears. Who is correct?