ASE A3 Manual Drive Train and Axles

6. A vehicle is clicking while making U-turns. Technician A says an outer CV joint could be the cause. Technician B says if water and dirt have intruded past its rubber boot, it can be repaired by replacing the lubrication and protective boot with a CV boot replacement kit. Who is correct?

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

6.

Answer A is correct. Faulty outer CV axle joints click while making turns, especially during sharp turns.

Answer B is wrong. Once the water and dirt intrusion has occurred, the axle joint or the entire unit, not just the rubber boot, must be replaced.

Answer C is wrong. They are protected by a rubber or plastic boot because they are particularly vulnerable to water and dirt intrusion.

Answer D is wrong. Technician A is correct.

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7. The clutch pedal of a vehicle with a manual transmission feels firm and is binding. The clutch sticks and does not completely disengage. Which of the following is MOST likely causing this condition?

  • A. The input shaft.
  • B. The input shaft bearing.
  • C. The clutch release bearing.
  • D. The vacuum booster.

7.

Answer A is wrong. Answer C is correct.

Answer B is wrong. Answer C is correct.

Answer C is correct. The clutch release/throwout bearing rides along a tube or shaft that's part of the front bearing retainer. This tube is lubricated at the factory to provide a smooth surface, reducing friction and preventing binding. Most manufacturers recommend restoring this lubricant whenever replacing the throwout bearing.

Answer D is wrong. A faulty throwout bearing makes a squealing or chirping sound when the bearing first contacts the pressure plate's fingers.

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8. A 6-speed manual transmission with a hydraulic clutch is difficult to shift and creeps in gear. Technician A says there may be air in the hydraulic fluid. Technician B says excessive clutch pedal free travel can cause this condition. Who is correct?

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

8.

Answer A is wrong. Both technicians are correct. Air trapped in the fluid results in a spongy pedal and incomplete disengagement.

Answer B is wrong. Excess free pedal travel causes clutch drag, resulting in gear clash and vehicle creep.

Answer C is correct. Clutch drag occurs when the clutch does not fully disengage.

Answer D is wrong. Both Technicians are correct.

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9. A vehicle with a 5-speed manual transmission and a dual mass flywheel rattles at startup. Technician A says a broken spring in the flywheel could cause this rattle. Technician B says resurfacing the flywheel and replacing the clutch will repair this condition. Who is correct?

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

9.

Answer A is correct. The internal springs weaken and break, causing excessive movement; this causes the secondary plate to oscillate, resulting in a noise and driveline vibration.

Answer B is wrong. A dual-mass flywheel contains two plates, a bearing, and internal springs that absorb torsional vibrations. They are difficult to resurface.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

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10. A constant-mesh manual transmission is binding and difficult to rotate. Technician A says the countershaft gear assembly may have faulty needle bearings. Technician B says this binding could be caused by worn, tapered roller bearings. Who is correct?

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

10.

Answer A is wrong. Some countershafts have a solid countershaft fixed to the case; it is fastened and does not spin. The countershaft gear assembly rides on needle bearings between the countershaft and the gear cluster.

Answer B is wrong. Another type of countershaft contains tapered roller bearings.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

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