Chrysler 2005 Crossfire SRT6 Service Manual page 3278

21 - 208 AUTOMATIC - NAG1 SERVICE INFORMATION
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Front Planetary Gear Set
The annulus gear (8) is driven by the driveshaft (25). The sun gear (21) is held against the housing by the locked
freewheel F1 (20) during acceleration and via the engaged multi-disc holding clutch B1 (4) during deceleration. The
planetary pinion gears (17) turn on the fixed sun gear (21) and increase the torque from the annulus gear (8) to the
planetary carrier (13). The planetary carrier (13) moves at a reduced speed in the running direction of the engine.
Center Planetary Gear Set
The annulus gear (10) turns at the input speed as a result of the engaged driving clutch K2 (9). The driving clutch
K3 (12) transfers an increased speed to the center planetary sun gear (22) due to the connection with the rear
planetary sun gear (23). The planetary pinion gears (18) turn between the annulus gear (10) and the sun gear (22).
The speed of the center planetary carrier (14) and the output shaft (26) connected to the center planetary carrier
lies between that of the annulus gear (10) and the sun gear (22). This provides a step-up ratio.
Rear Planetary Gear Set
The driving clutch K2 (9) is engaged and transfers the input speed of the driveshaft (25) to the planetary carrier (15)
via the annulus gear (10). The annulus gear (11) turns at a reduced speed due to the mechanical connection with
the front planetary carrier (13). The rear planetary pinion gears (19) turn between the annulus gear (11) and the sun
gear (23). The sun gear (23) moves at an increased speed in the running direction of the engine.
REVERSE GEAR POWERFLOW
Torque from the torque converter is increased via the driveshaft (25) and all three planetary gearsets and trans-
ferred with reversed direction of rotation to the output shaft (26).