Exam 8: Hydraulic Fundamentals

Technician A says that some automatic transmissions have a check plug on the side of the case to inspect fluid level rather than the traditional dipstick. Technician B says that some automatic transmissions use a plug on the bottom of the pan that attaches to a tube inside the transmission to set the fluid level to the correct level. Who is correct?

A common cause of transmission failure is a failed piston lip seal.

Technician A says that when checking the fluid level on the dipstick, always read the highest level on either side. Technician B says that checking the transmission fluid should be done when the engine and transmission are cold. Who is correct?

Technician A says that a spool valve can be positioned manually by springs or by hydraulic pressure. Technician B says that spool valves can have multiple lands with different diameters. Who is correct?

What is placed in the transmission pan is designed to help catch ferrous (iron-containing) particles that could cause severe damage to the internal surfaces of the pump as well as to the seals, bearings, and bushings within the transmission?

Where may the valve body may be located?

Technician A says that the sharp corners on a spool valve give it a self-cleaning action. Technician B says that due to the very close clearances, any damage will make the spool valve unusable. Who is correct?

Tech A says that accumulators are used to filter contaminates. Tech B says that accumulators are used to soften clutch engagement. Who is correct?

As throttle pressure increases, what other pressure changes to help hold the planetary clutches and brakes more firmly due to additional engine torque?

What information is usually contained in a technical service bulletin (TSB) contain?

Which of the following devices delay an apply by restricting the flow of oil in a hydraulic circuit?

Which style of automatic transmission filter is used inside the transmission case?

The vehicle has no reverse but moves forward. The transmission seems to drive forward fine. The transmission holds on deceleration in first. Which of these could cause the problem?

A pressure regulator valve ensures that:

Some automatic transmissions may have a threaded plug located on the transmission case that you remove while the vehicle is running to check the automatic transmission fluid level.

Technician A says precisely sized orifices can be used to control fluid flow in hydraulic circuits. Technician B says an orifice provides no restriction in line with the device being applied. Who is correct?

How can spool valves of an automatic transmission be moved or positioned?

A _______ is often a simple fine-mesh screen made out of metal or plastic such as polyester.

All of the following are advantages of using the clutch and band application charts EXCEPT:

How can spool valves of an automatic transmission be moved or positioned?