ASE A2 Automatic Transmission Practice Test

11. A transmission brake band:

  • A. Holds and drives members of the planetary gear set.
  • B. Is a stopping and holding device.
  • C. Both A and B.
  • D. Neither A or B.

11.

Answer A is wrong. Automatic transmission clutches hold and drive members of the planetary gear set.

Answer B is correct. A transmission band is a reaction device in the same family as multiple clutch discs and one-way overrunning clutches. There is a difference. A brake band is strictly a stopping and holding device.

Answer C is wrong. Automatic Transmission Brake Bands are flexible steel plates lined with organic (cellulose) or semi-metallic friction material.

Answer D is wrong. The lining absorbs transmission fluid to dissipate heat. As the band tightens around the drum, the fluid is squeezed into grooves cut into the band's surface. The band brings the drum to a stop and holds it there.

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12. Shift valves are controlled by:

  • A. Governor pressure.
  • B. Throttle pressure.
  • C. Both A and B.
  • D. Neither A or B.

12.

Answer A is wrong. Governor pressure works on one end of the valve, and a spring assisted by throttle pressure works on the other.

Answer B is wrong. Throttle pressure indicates engine load. Older transmissions use a vacuum modulator, and late-model vehicles use computer-controlled electric solenoids to achieve precise timing.

Answer C is correct. These two pressures control shift valve movement.

Answer D is wrong. Shift valves control hydraulic pressure flow to the reactionary devices (clutches and bands) that drive and hold the planetary gearset members.

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13. Technician A says the torque converter lockup clutch provides a mechanical link between the engine and the transmission. Technician B says that when the lockup clutch is fully engaged, the turbine speed reaches the impeller speed. Who is correct?

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

13.

Answer A is wrong. Both technicians are correct. The lockup clutch creates a mechanical link between the engine and the transmission. This connection occurs during the coupling phase when the turbine spins at about 90% of the impeller's speed.

Answer B is wrong. As engine speed increases, the impeller (the pump) spins and forces transmission fluid against the turbine vanes with enough force to turn the transmission's input/turbine shaft.

Answer C is correct. Learn more about torque converter lockup clutches in the Read more... section.

Answer D is wrong. Both technicians are correct.

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14. An automatic transmission has delayed engagement when shifting from Park into Drive or Reverse. Which of the following is LEAST likely to result in this condition?

  • A. A clogged transmission oil filter.
  • B. Low oil pressure.
  • C. Oil pump starvation.
  • D. Open shift interlock solenoid.

14.

Answer A is wrong. A clogged automatic transmission oil filter affects fluid flow and pressure. It causes a noticeable delay while shifting from Park into other gears.

Answer B is wrong. If the transmission has a drawn-out and delayed shift from Park to Reverse while backing up, suspect low or restricted oil pressure. Low pressure causes erratic shifting into other gears as well.

Answer C is wrong. A clogged oil filter results in oil pump starvation; the blockage obstructs the fluid supply. It can result in clutch and band slippage.

Answer D is correct. If the transmission does not shift out of Park, suspect a faulty shift interlock solenoid.

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15. Technician A says a faulty transmission range sensor will prevent starter operation. Technician B says to test an analog transmission range sensor with an ohmmeter. Who is correct?

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

15.

Answer A is wrong. A faulty neutral safety switch or transmission range sensor can prevent starter operation.

Answer B is wrong. An analog transmission range sensor consists of a series of resisters that reduce the voltage signal returned to the PCM. Test for resistance with an ohmmeter.

Answer C is correct. Both Technicians are correct. The Neutral Safety Switch and the TR sensor are protection devices used to prevent starter operation in all gears other than Park and Neutral.

Answer D is wrong. The Transmission Range Sensor is part of the transmission computer control system found on late-model vehicles. It can be analog or digital.

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