Exam 8: Hydraulic Fundamentals

When rebuilding a clutch pack, the piston needs to be carefully inspected for:

The transmission hydraulic pump is called the front pump due to its location in the transmission.

Technician A says a servo-operated band can only hold a member stationary in an automatic transmission. Technician B says multi-disc clutches can hold or drive individual members of the planetary set in an automatic transmission. Who is correct?

Technician A says that the torque converter hub drives the front pump in an automatic transmission. Technician B says that the turbine shaft drives the front pump. Who is correct?

Technician A says that governor pressure is controlled by torque converter rpm. Technician B says that governor pressure is controlled by output shaft speed. Who is correct?

Technician A says check valves are classified as one-way and two-way in automatic transmissions. Technician B says two-way check valves are often used in the release circuit for application devices. Who is correct?

A clutch and band application chart helps to:

When rebuilding a clutch pack, the piston needs to be carefully inspected for:

_______ filters have a thick filter medium that the fluid must pass through.

Which part of a gear type pump usually needs to be changed during an overhaul of an automatic transmission?

Technician A says that you should check fluid level in many automatic transmissions with the engine idling and the transmission in park. Technician B says that modern automatic transmissions may not have a dipstick to check the level.

Tech A says that one benefit of using hydraulic pressure is that it is not affected by leaks in the system. Tech B says that hydraulic pressure is the same in all directions within a closed container. Who is correct?

Technician A says check valves can be used to regulate maximum pressures within in automatic transmissions. Technician B says one-way check valves are often used in the release circuit for application devices. Who is correct?

Where is transmission fluid discharged from the front pump directed before being sent to the other transmission valves?

175 psi (1207 kPis applied to a clutch piston with a radius of 3" (6" diameter). What is the total clamping force?

When adjusting the fluid level in an automatic transmission with a dipstick, how much fluid is typically required to raise the level from the bottom of the crosshatched area or add mark to the full mark?

Both multi-disc clutches and bands are hydraulically operated.

Technician A says that a check ball should be replaced during a rebuild. Technician B says that the area a check ball is located should be inspected for damage. Who is correct?

Accumulators are used to:

Which of the following is a simple mechanism that uses a spring and a spool valve to dump excess fluid back to the transmission pan.