ASE A3 Manual Drive Train and Axles

1. There is a chirping sound as the clutch pedal is depressed. Technician A says it could be a worn clutch release bearing. Technician B says the sound is a worn transmission synchronizer. Who is correct?

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

1.

Answer A is correct. A chirping clutch release or throw out bearing will make a squeal when the bearing contacts the pressure plate diaphragm fingers.

Answer B is wrong. Technician A is correct. A worn synchronizer would affect a certain gear range. A clutch release bearing would be heard when the clutch pedal is depressed.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

2. Two technicians are discussing driveline seals. Technician A says repeated extension housing seal failure could be caused by a pitted axle slip yolk. Technician B says a bent axle will cause axle seal leakage. Who is correct?

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

2.

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

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

Answer C is correct. Repeated extension housing seal failure can be caused by a pitted slip yolk. A bent axle will also cause axle seal leakage.

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

3. While shifting a part time 4WD vehicle from 2H to 4H, the indicator light flashes and the vehicle remains in 2H. Technician A says this is caused by a faulty planetary gearset. Technician B says this could be caused by a faulty shift motor. Who is correct?

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

3.

Answer A is wrong. Technician B is correct. The planetary gearset, usually located between the input shaft and the drive sprocket, provides a lower gear ratio, allowing the vehicle to be shifted into (4L). The planetary gearset alters gear ratio. It does not engage the front axle for 4WD.

Answer B is correct. A fault shift motor will prevent front axle engagement. This would result in the vehicle remaining in 2H and the indicator light flashing, indicating a problem to the driver.

Answer C is wrong. Many of today’s transfer cases are electronic and require a controller.

Answer D is wrong. Technician B is correct.

4. Technician A says a clutch start switch is normally closed when the clutch pedal is released. Technician B says the clutch start switch is designed to complete the circuit between the ignition switch and the starter solenoid. Who is correct?

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

4.

Answer A is wrong. The clutch start switch is normally open when the clutch pedal is released.

Answer B is correct. It's normally open and closes to complete the circuit when the pedal is depressed.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

5. Two technicians are discussing a clutch master assembly. Technician A says external leaks are due to the secondary seal. Technician B says hydraulic fluid is hygroscopic and tends to absorb moisture from the atmosphere. Who is correct?

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

5.

Answer A is wrong. The primary seal leaks internally and the secondary seal leaks externally. A leaking secondary seal will result in fluid dripping from the clutch master on to the driver's floor panel.

Answer B is wrong. Brake fluid is typically used. Brake fluid is hygroscopic and easily absorbs moisture. Always remember to replace the cap on the brake fluid before putting it back into storage.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.