ASE A2 Automatic Transmission Practice Test

31. There is a whining sound coming from the inside of a three speed transmission that is heard in first and second gear but goes away when the transmission shifts into third gear. This whining sound is MOST likely caused by:

  • A. A worn output shaft bearing.
  • B. A worn extension housing bushing.
  • C. A worn multi-disc clutch.
  • D. A faulty planetary gearset.


Answer A is wrong. A worn output shaft bearing will cause growling sound in all gears.

Answer B is wrong. A worn extension housing bushing results in a loose fitting driveshaft slip yolk and a leaking extension housing seal.

Answer C is wrong. A worn and slipping clutch will result in a slipping gear and possible engine flare.

Answer D is correct. The gear sets internal gears are not rotating but held stationary in direct drive. If a component "like the pinion gears" are not moving or rotating, then their not making the whining noise. When two gears are driven with no gear held in reaction a 1:1 direct drive is achieved.

32. A vehicle with a three speed synchronous automatic transmission has engine flare while shifting from first to second gear in drive. Technician A says this is caused by early application of the intermediate band. Technician B says this is caused by a faulty overrunning clutch. Who is correct?

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


Answer A is wrong. Technician A is wrong. Early application of the intermediate band would result in a bind not an overspeed problem.

Answer B is wrong. 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 the release and spin freely when the next gear engages and takes over.

Answer C is wrong. Neither technician is correct.

Answer D is correct. Neither technician is correct.

33. After a recent transmission service a vehicle with an automatic transmission creeps forward when placed in neutral. Technician A says this is normal. Technician B says a worn or misadjusted manual valve will cause this problem. Who is correct?

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


Answer A is wrong. This is not normal. A worn or misadjusted manual valve can lead to pressure bleed between hydraulic circuits.

Answer B is correct. The manual valve should be inspected for wear and replaced or adjusted if necessary.

Answer C is wrong. The manual valve is located in the valve body. It's held by a detent and connected to the gear lever so movement of the lever moves the valve in it's bore. As the driver selects different gear selections, the manual valve directs fluid to different band and clutch circuits.

Answer D is wrong. Technician B is correct.

34. After draining the transmission fluid, pieces of black material are found in bottom of the transmission's oil pan. Which of these is causing this debris?

  • A. Worn gear teeth.
  • B. A worn bushing.
  • C. A worn clutch.
  • D. This is a normal condition.


Answer A is wrong. Worn gear teeth result in metal colored flakes in the base of the oil pan.

Answer B is wrong. Worn bushings and thrust washers leave brass or metal colored flakes in the bottom of the pan.

Answer C is correct. Answer C is correct. Pieces or chunks of black material come from worn clutch and band friction material.

Answer D is wrong. This is not a normal condition.

35. A vehicle's automatic transmission is not down shifting correctly. A disconnected vacuum hose is noticed hanging by transmission case. This vacuum hose should be connected to which of the following?

  • A. The Modulator.
  • B. The Throttle Position Sensor.
  • C. The Governor.
  • D. The Vehicle Speed Sensor.


Answer A is correct. A modulator is a vacuum controlled device that indicates engine load and controls throttle pressure.

Answer B is wrong. A throttle position sensor is used on today's electronically controlled transmissions to indicate load. They replace modulators in older hydraulic transmissions.

Answer C is wrong. Governors are used in hydraulically controlled transmissions to indicate vehicle speed.

Answer D is wrong. Vehicle speed sensor input replaced the governor in electronically controlled transmissions.