The document discusses different types of manual transmissions, including sliding-gear transmissions which are unsynchronized and were used in older vehicles, constant-mesh transmissions which are synchronized using synchronizers to prevent grinding between gears, and preselector manual transmissions which allow gears to be preselected using a lever. It also describes the main components of a manual transmission system, including the clutch, gears of different sizes, synchronizers, stick shift, and their basic functions in transmitting power from the engine to the drive wheels.

1. Transmission

3. CONTENT
• 1 Types of Manual Transmission
• 1.1 Sliding-gear transmission:
• 1.2 Constant-Mesh Transmission:
• 1.3 Preselector manual Transmission:
• 2 Parts of the manual transmission system and their functions
• 3 How manual transmission works
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5. Types of Manual Transmission
Sliding-gear transmission:
• These types of manual transmission are known as
unsynchronized transmission. It was invented in the
late 19th century which is why they are found on older
model cars. When staying stationary when the
transmission is neutral. In the transmission case, the
main drive gear and cluster gear keep moving.

6. •https://youtu.be/tAxzTSYsCE8

7. Constant-Mesh Transmission:
• These types of transmission are known as
synchronized transmission. The drive gear, cluster gear
and main shaft gears in constant motion. this happens
because the gears freely spin around the main shaft.
• Sliding gear transmission is used to lock gears in
place. A dog clutch also helps to lock these gears in
place when needed. Teeth on the dog clutch and main
shaft gears lock onto each other and hold the gear
stationary. This occurs as the shift linkage moves.
• The synchronizers are used in this transmission to
prevent clashing or grinding while changing gears.

8. •https://youtu.be/5AHcLthMau4

9. • Preselector manual Transmission:
• This manual transmission system was also developed
before the invention of automatic transmission. It is
known as the Wilson preselector, introduced in 1930.
• The transmission uses a planetary gear system to
preselect gear ratio. A small lever on the steering
column is used. Drivers shift gears by pressing down
the foot pedal that notifies one of the preselected gears.
• The previous gear disengaged immediately the new
gear engages.

10. https://youtu.be/nDD_TrJ-rKI

11. Parts of the manual transmission system
and their functions
• Clutch disc; allows the torque to be transmitted from the engine to the
manual transmission system. This disc works when the clutch pedal is
pressed.

12. • Clutch pedal: is a manual transmission part that is operated hydraulically. it
controls the clutch disc when pressed by foot.

13. • Synchronizers: synchronizers allow the engagement
between the collar and the gear. It makes the speed to be
synchronized. The speed could end up being different but it
prevents that from happening.

14. •Flywheel: The
flywheel is one of
the major parts in
manual
transmission that
send torque from
the engine to the
clutch disc.

15. • Gears: gears in the
transmission is of
different sizes of big
and small. The big
gears generate extra
torque to slow down
the speed of the
vehicle. Smaller gears
generate less torque
making the vehicle to
move faster.

16. • Selector fork: is a gear that allows the collars to move
on the output shaft.

17. •Stick shift: this
manual
transmission part
is used for
applying the gear
via hand. It is
connected to the
gearbox

18. •Collar: collars
are used to lock
the selected
gear in place
and allow the
torque to past to
the output shaft.

19. https://youtu.be/wCu9W9xNwtI