ASE A3 Manual Drive Train and Axles

Ring and Pinion gear tooth contact pattern.

16. After setting the backlash and pinion depth on a new ring and pinion gearset the tooth contact pattern is being checked. The illustration above indicates:

  • A. The pinion depth should be increased.
  • B. The pinion depth should be decreased.
  • C. There is insufficient ring gear backlash.
  • D. None of the above.

16.

Answer A is correct. The pattern indicates the pinion depth should be increased. This would move the contact pattern closer to the bottom or root of the ring gear.

Answer B is wrong. When the tooth contact pattern is too close to the root of the ring gear, pinion depth should be decreased, moving the pinion away from the ring gear. This would move the tooth contact pattern closer to the top. The contact pattern should centered between the top and the root or flank of the gears teeth, not at the top of the gears teeth like the illustration.

Answer C is wrong. Adjusting ring gear backlash moves the pattern from the outer end of the ring gear (heel) to the inner end of the ring gear (toe) and visa versa.

Answer D is wrong. Answer A is correct.

17. Gold metal shavings are found in the oil after draining a five speed manual transaxle. Technician A says this is a normal condition. Technician B says this is from chipped gear teeth. Who is correct?

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

17.

Answer A is wrong. Both are of these technicians are wrong. This is not a normal condition. They're actually brass shavings.

Answer B is wrong. Metal shavings from a gears teeth would appear like shinny metal or silver, not gold.

Answer C is wrong. Neither of these technicians are correct.

Answer D is correct. Neither of these technicians are correct.

18. An all wheel drive vehicle suffers from continuous viscous clutch failure. Which of the following is the cause?

  • A. Front Universal Joints
  • B. Overfilled Fluid
  • C. Vehicle Speed Sensor
  • D. Different Size Tires

18.

Answer A is wrong. Universal joints cause a vibration that increases with vehicle speed.

Answer B is wrong. Overfilled fluid would not likely cause repeated failure.

Answer C is wrong. A bad vehicle speed sensor would affect a vehicle's speedometer and cruise control. It would also affect an automatic transmission's shift timing.

Answer D is correct. The viscous clutch is designed to allow for differences in axle rotation. When forced to compensate for different sized tires or inflation, the clutch is over worked and will wear prematurely.

19. A manual transaxle is suffering from clutch chatter. Technician A says that clutch chatter is caused by glazed clutch facings. Technician B says a worn pressure plate will cause clutch chatter. Who is correct?

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

19.

Answer A is wrong. Both technicians are correct. Glazed or contaminated clutch facings will result in clutch chatter.

Answer B is wrong. A worn pressure plate will result in clutch chatter.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

20. Two technicians are discussing a growling sound in second gear only. Technician A says the grooves on the blocking ring of its synchronizer are rounded. Technician B says that second gear has a chipped tooth. Who is correct?

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

20.

Answer A is wrong. The inner surfaces of the blocking ring must be sharp.

Answer B is correct. Technician B is correct. The growling or grinding sound is more pronounced in the gear with the chipped tooth.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.