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. The ASE A3 Manual Drive Train and Axles test has questions that require an understanding the clutch system. This includes the clutch release bearing, slave and master cylinder, and the linkage or lines and hoses. 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 faulty clutch release bearing can be heard squealing 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.