Axles & Differentials

Transcription

1 ATASA 5 th Study Guide Chapter 39 Pages Points Please Read The Summary

2 Before We Begin Keeping in mind the Career Cluster of Transportation, Distribution & Logistics Ask yourself: What TDL careers might be present in this slide series? What TDL careers might interest me? How do TDL careers relate to my other high school classes? What career cluster is my 4 year plan preparing me for?

3 Is there a career for me that melds 2 or more of my favorite clusters?

4 1. The drive line assembly (drive axle assembly) transmits from the engine and transmission to the vehicle s wheels. The drive line components also multiply torque, change direction of power flow, and allow different speeds between the driving wheels. Pressure Force Torque

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6 2. FWD axle shafts are fitted with (CV) joints that transfer uniform torque at a constant speed while operating through a wide range of angles up to 40 degrees. Continuously Variable Common Vehicle Constant Velocity

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8 3. CV joints allow the of the axle assembly to change as the wheel travels up & down. Length Angle Torque

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10 4. CV joints are classified by,, and. Location Function Design ATASA 5 th

11 POSITION

12 FUNCTION

13 DESIGN

14 5. joints are nearest the transaxle. joints are nearest the wheels. Outboard Inboard Onboard

15 6. joints are capable of length changes. joints cannot change length. Nixed, Plunge Fixed, Plunge Plunge, Fixed

16 7. The is typically an outboard, fixed CV joint with 6 balls in a roller cage.

17 8. CV joints & CV joints are plunging ball types. Double Offset, Cross Groove

18 9. A has 3 trunions fitted with spherical rollers on needle bearings. (plunge or fixed) Trio Tripod Triangle

19 10. FWD shafts can be either equal or unequal length and can be either solid or tubular. Drive Axle Half

20 Intermediate Shafts

21 11. On hard acceleration vehicle s tend to steer toward the side with the longer half shaft. Bump Memory Torque

22 12. A small weight attached to a half shaft can reduce harmonic vibrations. Pamper Damper Camper

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24 13. CV joints have a higher failure rate characterized by a clicking while cornering. Rear Outboard Inboard

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26 14. Torn or leaking CV boots should be replaced ASAP along with new grease & clamps. True or False

27 15. Best Practice is to recheck alignment after replacing half shafts. True or False

28 16. Hotchkiss type RWD drive shafts are often fit with joints, known as cardan joints or spicer joints. Universal Rzeppa Ball & Socket

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30 17. A or external carrier bearing is used on excessively long shafts. Center Support Cross Groove Hanging Bearing

31 18. A yoke is used to allow effective length change of the RWD shaft. Slip Dip Rip

32 19. When universal joint yokes are in the same plane, the joints are said to be. In Phase In Sync In Touch

33 20. Maintaining minimal universal joint is critical to smooth operation. Operating Room Operating Angle Operating Temperature

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35 21. & binding can be reduced by using canceling angles on the U joints. Vibration Citation Commotion

36 22. U Joints can be held onto their yokes with either an snap ring, an snap ring, or a combination of the two ring types. (Spicer Mechanics or Detroit/Saginaw Cleveland) Internal, External Intrinsic, Extrinsic Interval, Extrovert

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40 23. A joint is also known as a double cross & roller or RWD CV joint. Constant Volume Constant Velocity Common Velocity

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42 24. A worn extension housing can cause a rear trans fluid leak even with a good seal. Bushing Bearing Shaft

43 25. provide a gear reduction & allow the cornering wheels to turn at different speeds. Transmissions Differentials Transaxles

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47 Overhung, Straddle Overhang, Saddle Overhead, Scandal

48 Gearsets can be classified as either: hunting, non hunting, or partial hunting. A non hunting gearset always has the same teeth in contact with each other. A non hunting set is characterized by a whole number ratio such as 3:1, 4:1, 5:1. A hunting gearset does not mesh the same gear teeth during each revolution and would have a decimal ratio such as 2.89:1 or 3.27:1 or 4.11:1. A partial hunting gearset would be characterized by ratios like 2.5:1 or 3.5:1 or 4.5:1.

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52 Limited Slip Lost Torque Lever Actuated

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55 SAE 80 or SAE 90 SAE 20 or SAE40 SAE 5W30 or 0W30

56 26. Differentials mesh an input gear with a gear to achieve the final drive reduction. A reduction in speed of a gearset results in an increase of torque through that gearset. Pinion, Ring Spider, Crown Bevel, Worm

57 27. Differential input pinions are either or mounted on bearings. Overhung, Straddle Overhang, Saddle Overhead, Scandal

58 28. differential gearsets have more than one gear in contact at a time in a wiping motion. Hypiod Thyroid Steroid

59 29. Gearsets can be classified as either, or partial hunting. Hunting, Non Hunting Hunting, Some what Hunting Hunting, Fishing

60 30. Rear axle housings are either or carrier in design. Integral, Removable Internal, Detachable Ingenious, Rzeppa

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62 31. differentials supply the most torque to the axle that s easiest to turn. (has the least traction) Open Closed Ajar

63 32. differentials supply the torque to the axle that has the most traction. Limited Slip Lost Torque Lever Actuated

64 32. differentials supply the torque to the axle that has the most traction. Limited Slip Lost Torque Lever Actuated

65 33. The axle transfers torque from the differential to the vehicle s driving wheels. Booster Shaft Cylinder

66 34. A axle does not drive a vehicle. A axle is one that transfers torque to drive a vehicle. Live, Dead Dead, Live Wanted, Escaped

67 35. Most RWD vehicles have axles that transmit only driving torque. Semi floating Semi driving Semi sonic

68 36. floating axles & floating axles are used in heavy duty vehicles. Three Quarter, Full Five Quarter, Full One Quarter, Full

69 37. Axle shaft bearings are subjected to both loading and loading (axial). Radial. Thrust Radial, Axial Radial, Axial

70 38. Axle bearings are lubricated by the gear oil in the. (hypoid 80w90) (Limited slip may require a special additive.) Oil Pan Axle Housing Oil Tank

71 39. Noises happen in different modes:,,, and mode. Drive, Cruise, Coast, Float

72 40. While removing & replacing an integral carrier differential from the axle housing, a tool called a case must be used to distort the housing just enough to slide the carrier in and out. Shredder Spreader Threader

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74 41. Differential side gears are held on to axle shafts by shaped washers fit into axle shaft grooves. C F Z

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76 Systems Repair

77 42. Pinion bearing and gearset are critical checks and possibly adjustments to be made when assembling, servicing, or diagnosing differential complaints. Preload, Backlash Runout, Parallelism End Play, Clearance

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79 43. A ring gear is never replaced without replacing its mating gear. (wear mated parts) Drive Pinion

80 44. Gearset backlash is measured with a dial indicator on a ring gear tooth, holding the input pinion, and noting the movement while the ring gear. It is then adjusted to meet specs <.004 Hammering Rocking Spinning

81 45. Gearset backlash is adjusted either with or by turning both bearing adjusting. Shims, Nuts

82 46. Turning only 1 adjusting nut or installing only 1 shim will change carrier bearing. Preload Backlash Runout

83 47. Both input pinion bearing & carrier bearing preload is measured with an inch pound wrench connected in such a way to indicate the torque needed to turn the components. Collapsible Spacer Torque Crow s Foot Pipe

84 48. The pattern of gear teeth determines how the two meshed gears will run and describes where on the faces of the teeth the two gears will. Quietly, Contact

85 49. Checking tooth contact pattern is done by the ring gear teeth with a marking compound & turning the input yoke or companion flange in both directions. Contact should be in the middle of the flank, toe, & heel of the ring gear teeth. If not, gearset noise is the result. Painting or Coating

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87 50. Rear axles use either SAE or gear oil. (GL 4 or GL 5) (Limited slip may require a special additive.) 80 or or or 30

88 51. A bent axle or axle runout can also be a source of rear end vibration. Flange Pinch Weld Overlap

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90 Now that we re through Keeping in mind that Career Clusters sensibly link education to careers Ask yourself: What careers could be linked to the topics in this slide series? Which of those careers might interest me? How do career clusters relate to my other high school classes? Do I need to change my 4 year plan to fit my desired career?

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