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.Limp-in mode illuminates the MIL and operates the transmission in only one forward gear (2nd or 3rd) and reverse. It limits top speed and disables simulated shifts in most vehicles with CVT transmissions. The vehicle should be driven or towed directly to the repair shop. The mode causes the vehicle to start slow and caps the engine speed to around 3000 RPM. An underlying condition has caused this, and an inspection and scan are needed to diagnose the fault that resulted in this condition. Check all fluid levels.

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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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