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MANUAL TRANSMISSIONS. Chapter 4 Classroom Manual Page 67 Lab Manual Page 105. CBC AUTOMOTIVE RK. OBJECTIVES. Discuss the operation of typical manual transmissions. Describe the purpose and operation of a synchronizer. Discuss power flow through a manual transmission.

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manual transmissions
MANUAL TRANSMISSIONS
  • Chapter 4
  • Classroom Manual
    • Page 67
  • Lab Manual
    • Page 105

CBC

AUTOMOTIVE

RK

objectives
OBJECTIVES
  • Discuss the operation of typical manual transmissions.
  • Describe the purpose and operation of a synchronizer.
  • Discuss power flow through a manual transmission.
  • Compare and contrast transmissions and transaxles.

CBC

AUTOMOTIVE

RK

objectives1
OBJECTIVES
  • Discuss power flow through a transaxle.
  • Describe how gears are shifted.
  • Identify accessories controlled by a manual trans.
  • Discuss Gear oil.

CBC

AUTOMOTIVE

RK

manual trans
MANUAL TRANS
  • Purpose to keep engine in normal operating RPM range.
  • Manual transmissions and transaxles are fundamentally the same.
  • Can change gear ratios and reverse direction.
  • Transaxle includes differential in same housing.

CBC

AUTOMOTIVE

RK

sliding gear trans
SLIDING GEAR TRANS
  • Sliding spur gears.
  • Gears go in & out of mesh.
    • If gear speeds are different grinding will occur.
    • Typically used for reverse in both transmissions and transaxles.

Page 69

collar shift trans
COLLAR SHIFT TRANS
  • A collar shift trans has parallel shafts fitted with gears in constant mesh.
    • If gear speeds are different grinding will occur.
    • Used for Low gear on some older model transmissions.

CBC

AUTOMOTIVE

RK

Page 69

synchromesh trans
SYNCHROMESH TRANS
  • A synchromesh transmission is a constant mesh, collar shift transmission equipped with synchronizers, which equalize the speed of the shafts and gears before they are engaged.

CBC

AUTOMOTIVE

RK

Page 69

synchronizers
SYNCHRONIZERS
  • Purpose to equalize shaft and gear speeds.
  • Four types
    • Hub
    • Sleeve
    • Blocking Ring
    • Inserts or spring & ball devices

CBC

AUTOMOTIVE

RK

Page 70

synchro operation
SYNCHRO OPERATION

CBC

AUTOMOTIVE

RK

Page 71

synchro operation1
SYNCHRO OPERATION

CBC

AUTOMOTIVE

RK

Page 72

synchro operation2
SYNCHRO OPERATION

CBC

AUTOMOTIVE

RK

Page 72

transmission designs
TRANSMISSION DESIGNS
  • Three-Speed Transmission
  • Three-Speed Transmission /w add-on OD
  • Four-Speed Transmission
  • Four-Speed Transmission /w Internal OD
  • Five-Speed Transmission /w Internal OD
  • Six-Speed Transmission /w 2 Internal OD’s

CBC

AUTOMOTIVE

RK

Page 73 - 74

aftermarket od
AFTERMARKET OD
  • Available for popular standard and automatic transmissions.
  • Expensive $1,000 to $2,000
    • Must shorten drive shaft.
    • Some are two speed.
      • Direct and OD
      • Direct and UnderDrive

CBC

AUTOMOTIVE

RK

Page 75

basic operation
BASIC OPERATION

CBC

AUTOMOTIVE

RK

Page 77

detent interlock
DETENT & INTERLOCK
  • Detent - a ball & spring used to hold a shift rail in position.
  • Interlock - a oval shaped device used between shift rails so only one gear at a time can be selected.
  • Rollpin or setscrew - used to attach a shift fork to a shift rail.

CBC

AUTOMOTIVE

RK

Page 79

detent interlock1
DETENT & INTERLOCK

CBC

AUTOMOTIVE

RK

Page 79

shift rail typical
SHIFT RAIL TYPICAL

Page 79

CBC

AUTOMOTIVE

RK