Chrysler 2005 Crossfire SRT6 Service Manual page 3404

21 - 334 AUTOMATIC - NAG1 SERVICE INFORMATION
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PISTON TRAVEL
The relationship between hydraulic lever and a
mechanical lever is the same. With a mechanical
lever, it's a weight-to-distance output rather than a
pressure-to-area output. Using the same forces and
areas as in the previous example, the smaller piston
has to move ten times the distance required to move
the larger piston one inch. Therefore, for every inch
the larger piston moves, the smaller piston moves ten
inches. This principle is true in other instances also. A
common garage floor jack is a good example. To raise
a car weighing 2000 lbs., an effort of only 100 lbs.
may be required. For every inch the car moves
upward, the input piston at the jack handle must move
20 inches downward.
PLANETARY GEARTRAIN
DESCRIPTION
Three planetary gear sets are used to produce the different gear ratios. These are located in the mechanical part of
the transmission as the front, middle and rear planetary gear sets.
OPERATION
The annulus gear (1) and sun gear (3) elements of a
planetary gear system are alternately driven and
braked by the actuating elements of the multi-plate
clutch and multiple-disc brake. The planetary pinion
gears (2) can turn on the internal gearing of the annu-
lus gear (1) and on the external gearing of the sun
gear (3). This allows for a variety of gear ratios and
the reversal of the rotation direction without the need
for moving gear wheels or shift collars. When two
components of the planetary gear set are locked
together, the planetary gear set is locked and turns as
a closed unit.
The torque and engine speed are converted according
to the lever ratios and the ratio of the number of teeth
on the driven gears to that on the drive gears, and is
referred to as the gear ratio. The overall ratio of a
number of planetary gear sets connected in series is
obtained by multiplying the partial ratios.