ASE A2 Automatic Transmission Practice Test

56. Technician A says that when the torque converter's lockup clutch engages, the turbine speed matches the impeller speed. Technician B says the lockup clutch engages during the coupling phase. Who is correct?

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

56.

Answer A is wrong. During the coupling phase, the turbine's speed is around 90% of the impeller's. It's when the lockup clutch fully engages, cooling the transmission fluid and increasing performance.

Answer B is wrong. This stage occurs when the vehicle is cruising.

Answer C is correct. Both technicians are correct. There are three phases of operation: the stall phase, the acceleration phase, and the coupling phase.

Answer D is wrong. Both technicians are correct.

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57. The MIL is illuminated, and the transmission only operates in third and reverse gears. Which of the following is MOST likely causing this condition?

  • A. Adaptive learning.
  • B. High line pressure.
  • C. Low line pressure.
  • D. Limp mode.

57.

Answer A is wrong. Today's electronic transmissions adapt and compensate for clutch and band wear conditions.

Answer B is wrong. High line pressure results in hard shifting

Answer C is wrong. Low line pressure results in slipping and excessive clutch and band wear.

Answer D is correct. This is the most likely choice. Limp-in mode illuminates the MIL and operates the transmission in only one forward gear (2nd or 3rd) and reverse.

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58. Technician A says a transmission fluid temperature sensor (TFT) is a thermistor. Technician B says a scan tool and an ohmmeter can be used to diagnose a TFT sensor. Who is correct?

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

58.

Answer A is wrong. The transmission fluid temperature sensor is a thermistor.

Answer B is wrong. Use a scan tool and a multimeter to diagnose a TFT sensor.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

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59. A transaxle's torque converter clutch is not engaging. Technician A says a faulty TFT sensor could cause this. Technician B says a defective ECT sensor would cause this condition. Who is correct?

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

59.

Answer A is wrong. Both of these technicians are correct. The transmission fluid temperature sensor and the engine coolant temperature sensor are vital inputs for torque converter clutch operation.

Answer B is wrong. The ECT inputs engine coolant temperature information. The TCM adjusts the TCC application with this necessary input. TCM is an acronym for the transmission control module.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

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60. Technician A says that the vehicle speed sensor is driven by the input shaft of an automatic transmission. Technician B says the parking pawl engages the input shaft to lock an automatic transmission in Park. Who is correct?

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

60.

Answer A is wrong. The vehicle speed sensor is driven by the output shaft of an automatic transmission.

Answer B is wrong. The parking pawl engages the output shaft to lock an automatic transmission in Park.

Answer C is wrong. Neither technician is correct.

Answer D is correct. Both the parking pawl and the vehicle speed sensor are associated with the output shaft.

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ASE A2 Automatic Transmission Quiz
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