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Manual Transmission and Driveline
Manual transmissions and transaxles provide the driver with manually selectable gear ratios. The numbers of ratios depends on
manufacturer, but anywhere from 3 to 7 gear ratios are found in cars and light trucks. The difference between a transmission
and transaxle is the latter has the final drive or axle differential incorporated within the transmission housing. The individual
ratios use a pair of gears, one is splined to a shaft and the other is riding on needle bearings (speed gear) on a separate shaft, a
synchronizer which matches speeds and couples the speed gear to the transmission shaft. The torque is then transferred from
the engine to the input shaft via a driver operated clutch. The clutch allows the driver to engage and disengage the engine from
the transmission or transaxle. Torque from the input shaft travels through the gear pair to the output shaft and finally out to the
driveline. The driveline encompasses the propeller shafts, transfer case (AWD/4WD vehicles) and axles. The driveline transfers
the torque from the transmission to the drive wheels.
Clutch Pressure Plate
Clutch Friction Disc
Flywheel
Clutch Release Bearing
Clutch Pilot Bearing or Bushing
Bearings and Bushings
Seals and Gaskets
Constant Velocity Joints
U-Joints
Gear Oils

Summary of content (6 pages)