ASE A2 Automatic Transmission Practice Test

16. Technician A says the valve body separator plate contains the seat for ball-type check valves. Technician B says ball-type check valves allow fluid flow in only one direction. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

16.

Answer A is wrong. The valve body consists of different types of valves. Check valves are placed in hydraulic circuits to prevent flow in one direction while allowing flow in the other.

Answer B is wrong. Make sure the check balls return to their original locations.

Answer C is correct. Check valves are placed in hydraulic circuits to allow flow in only one direction.

Answer D is wrong. Retrieve specifications; using the correct torque and pattern when reinstalling a valve body to a transmission case is essential. Most patterns start in the middle and spiral outwards.

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Transmssion solenoid chart.

17. A vehicle is not shifting into first gear and has no overdrive. View the chart above to determine which of the following is correct?

  • A. Shift solenoid A is faulty.
  • B. Shift solenoid A's circuit is compromised.
  • C. Shift solenoid B is faulty.
  • D. Both A and B are correct.

17.

Answer A is wrong. The solenoid or the circuit could be the problem.

Answer B is wrong. Both A and B are correct.

Answer C is wrong. The TCM powers solenoid B to shift into first and second gears.

Answer D is correct. Both A and B are correct. Transmission solenoid, clutch, and band charts are diagnostic tools for diagnosing shifting problems.

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18. Which of the following is at the center of the planetary gear set?

  • A. The pinion gear.
  • B. The ring gear.
  • C. The spur gear.
  • D. The sun gear.

18.

Answer A is wrong. The pinion gears have external teeth in mesh with both the sun and ring gears. It consists of several pinion gears contained inside a carrier called the planet carrier.

Answer B is wrong. The ring gear has internal teeth and always remains in constant mesh with the pinion gear.

Answer C is wrong. A spur gear is a straight (not helical) gear used in older manual transmissions.

Answer D is correct. The sun gear is located at the center of the planetary gear set and remains in constant mesh with the pinion gears.

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19. A vehicle with an automatic three-speed synchronous transmission slips when it shifts from first to second gear. Technician A says inaccurate timing in a synchronous transmission results in slipping and engine flare. Technician B says that early application of the intermediate band is causing this condition. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

19.

Answer A is correct. Synchronous transmissions rely on precise shift timing. Non-synchronous transmissions have overrunning clutches that lock and drive the output shaft in the first gear and then release and spin freely when the next gear engages and takes over.

Answer B is wrong. Early application of the intermediate band would result in a bind, not a slip.

Answer C is wrong. A non-synchronous automatic transmission uses a one-way driving clutch that overruns as the next gear engages.

Answer D is wrong. Technician A is correct.

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20. Which of the following sensors affect the performance of the engine and the automatic transmission?

  • A. The Manifold Absolute Pressure Sensor.
  • B. The Mass Air Flow Sensor.
  • C. The Throttle Position Sensor.
  • D. All of the above.

20.

Answer A is wrong. The (MAP) manifold absolute pressure sensor senses pressure in the intake manifold. A faulty MAP sensor affects engine performance but can also affect a transmission's shift timing.

Answer B is wrong. The MAF or Mass Air Flow sensor provides information about engine load to the ECM and the TCM.

Answer C is wrong. The TP sensor's output, shared by the ECM and the TCM, indicates the throttle plate's angle. If the throttle plate were to approach WOT (4.5 volts) suddenly, the transmission should downshift.

Answer D is correct. The transmission control module uses inputs from the ECT, MAF, MAP, VSS, TPI, and more.

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