Jeep Grand Cherokee WK. Manual — part 1472
Center Planetary Gear Set
The annulus gear (10) is driven at the same speed as the rear planetary carrier (15) as a result of a mechanical
connection. The sun gear (22) is held against the housing by the multiple-disc holding clutch B2 (6). The planetary
pinion gears (18) turn on the fixed sun gear (22) and increase the torque from the annulus gear (10) to the plan-
etary carrier (14). The output shaft (5) connected to the planetary carrier (14) turns at a reduced speed in the run-
ning direction of the engine.
THIRD GEAR POWERFLOW
1 - TORQUE CONVERTER LOCK-UP CLUTCH
14 - CENTER PLANETARY CARRIER
2 - TORQUE CONVERTER TURBINE
15 - REAR PLANETARY CARRIER
3 - TORQUE CONVERTER IMPELLER
16 - TORQUE CONVERTER STATOR
4 - HOLDING CLUTCH B1
17 - FRONT PLANETARY PINION GEARS
5 - HOLDING CLUTCH B3
18 - CENTER PLANETARY PINION GEARS
6 - HOLDING CLUTCH B2
19 - REAR PLANETARY PINION GEARS
7 - DRIVING CLUTCH K1
20 - FREEWHEELING CLUTCH F1
8 - FRONT PLANETARY ANNULUS GEAR
21 - FRONT PLANETARY SUN GEAR
9 - DRIVING CLUTCH K2
22 - CENTER PLANETARY SUN GEAR
10 - CENTER PLANETARY ANNULUS GEAR
23 - REAR PLANETARY SUN GEAR
11 - REAR PLANETARY ANNULUS GEAR
24 - FREEWHEELING CLUTCH F2
12 - DRIVING CLUTCH K3
25 - INPUT SHAFT
13 - FRONT PLANETARY CARRIER
26 - OUTPUT SHAFT
A - ENGINE SPEED
C - FIRST GEAR RATIO
B - TRANSMISSION INPUT SPEED
D - FIXED PARTS
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AUTOMATIC TRANSMISSION - NAG1 - SERVICE INFORMATION
WK
Torque from the torque converter is increased via the input shaft (25) and the center planetary gearset and trans-
ferred to the output shaft (26).
Front Planetary Gear Set
The planetary carrier (13) and sun gear (21) are connected via the engaged multiple-disc clutch K1 (7). The plan-
etary gearset is therefore locked and turns as a closed unit at the input speed due to the mechanical connection of
the annulus gear (8) and input shaft (25).
Rear Planetary Gear Set
The multiple-disc clutch K2 (9) is engaged and transfers the input speed of the input shaft (25) to the planetary
carrier (15) via the annulus gear (10). The annulus gear (11) turns in the same way as the planetary carrier (15) due
to the mechanical connection with the locked front planetary gearset. This planetary gearset is therefore locked and
turns as a closed unit.
Center Planetary Gear Set
The annulus gear (10) turns at the input speed as a result of the engaged multiple-disc clutch K2 (9). The sun gear
(22) is held against the housing by the multiple-disc holding clutch B2 (6). The planetary pinion gears (18) turn on
1 - TORQUE CONVERTER LOCK-UP CLUTCH
14 - CENTER PLANETARY CARRIER
2 - TORQUE CONVERTER TURBINE
15 - REAR PLANETARY CARRIER
3 - TORQUE CONVERTER IMPELLER
16 - TORQUE CONVERTER STATOR
4 - HOLDING CLUTCH B1
17 - FRONT PLANETARY PINION GEARS
5 - HOLDING CLUTCH B3
18 - CENTER PLANETARY PINION GEARS
6 - HOLDING CLUTCH B2
19 - REAR PLANETARY PINION GEARS
7 - DRIVING CLUTCH K1
20 - FREEWHEELING CLUTCH F1
8 - FRONT PLANETARY ANNULUS GEAR
21 - FRONT PLANETARY SUN GEAR
9 - DRIVING CLUTCH K2
22 - CENTER PLANETARY SUN GEAR
10 - CENTER PLANETARY ANNULUS GEAR
23 - REAR PLANETARY SUN GEAR
11 - REAR PLANETARY ANNULUS GEAR
24 - FREEWHEELING CLUTCH F2
12 - DRIVING CLUTCH K3
25 - INPUT SHAFT
13 - FRONT PLANETARY CARRIER
26 - OUTPUT SHAFT
A - ENGINE SPEED
C - FIRST GEAR RATIO
B - TRANSMISSION INPUT SPEED
D - FIXED PARTS
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AUTOMATIC TRANSMISSION - NAG1 - SERVICE INFORMATION
21 - 699
the fixed sun gear (22) and increase the torque from the annulus gear (10) to the planetary carrier (14). The output
shaft (26) connected to the planetary carrier (14) turns at a reduced speed in the running direction of the engine.
FOURTH GEAR POWERFLOW
1 - TORQUE CONVERTER LOCK-UP CLUTCH
14 - CENTER PLANETARY CARRIER
2 - TORQUE CONVERTER TURBINE
15 - REAR PLANETARY CARRIER
3 - TORQUE CONVERTER IMPELLER
16 - TORQUE CONVERTER STATOR
4 - HOLDING CLUTCH B1
17 - FRONT PLANETARY PINION GEARS
5 - HOLDING CLUTCH B3
18 - CENTER PLANETARY PINION GEARS
6 - HOLDING CLUTCH B2
19 - REAR PLANETARY PINION GEARS
7 - DRIVING CLUTCH K1
20 - FREEWHEELING CLUTCH F1
8 - FRONT PLANETARY ANNULUS GEAR
21 - FRONT PLANETARY SUN GEAR
9 - DRIVING CLUTCH K2
22 - CENTER PLANETARY SUN GEAR
10 - CENTER PLANETARY ANNULUS GEAR
23 - REAR PLANETARY SUN GEAR
11 - REAR PLANETARY ANNULUS GEAR
24 - FREEWHEELING CLUTCH F2
12 - DRIVING CLUTCH K3
25 - INPUT SHAFT
13 - FRONT PLANETARY CARRIER
26 - OUTPUT SHAFT
A - ENGINE SPEED
B - TRANSMISSION INPUT SPEED
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AUTOMATIC TRANSMISSION - NAG1 - SERVICE INFORMATION
WK
Speed and torque are not converted by the direct gear ratio of the 4th gear. Power is transferred from the input
shaft (25) to the output shaft (26) via three locked planetary gearsets.
Front Planetary Gear Set
The planetary carrier (13) and sun gear (21) are connected via the engaged multiple-disc clutch K1 (7). The plan-
etary gearset is therefore locked and turns as a closed unit at the input speed due to the mechanical connection of
the annulus gear (8) and the input shaft (25).
Rear Planetary Gear Set
The multiple-disc clutch K2 (9) is engaged and transfers the input speed of the input shaft (25) to the planetary
carrier (15) via the annulus gear (10). The annulus gear (11) turns in the same way as the planetary carrier (15) due
to the mechanical connection with the locked front planetary gearset. The planetary gearset is therefore locked and
turns as a closed unit.
Center Planetary Gear Set
The annulus gear (10) turns at the input speed as a result of the engaged multiple-disc clutch K2 (9). The multiple-
disc clutch K3 (12) connects the sun gears (22) and (23) of the rear and center planetary gearset. The planetary
gearset is locked by the same speeds of the annulus gear (10) and the sun gear (22) and it turns as a closed unit.
1 - TORQUE CONVERTER LOCK-UP CLUTCH
14 - CENTER PLANETARY CARRIER
2 - TORQUE CONVERTER TURBINE
15 - REAR PLANETARY CARRIER
3 - TORQUE CONVERTER IMPELLER
16 - TORQUE CONVERTER STATOR
4 - HOLDING CLUTCH B1
17 - FRONT PLANETARY PINION GEARS
5 - HOLDING CLUTCH B3
18 - CENTER PLANETARY PINION GEARS
6 - HOLDING CLUTCH B2
19 - REAR PLANETARY PINION GEARS
7 - DRIVING CLUTCH K1
20 - FREEWHEELING CLUTCH F1
8 - FRONT PLANETARY ANNULUS GEAR
21 - FRONT PLANETARY SUN GEAR
9 - DRIVING CLUTCH K2
22 - CENTER PLANETARY SUN GEAR
10 - CENTER PLANETARY ANNULUS GEAR
23 - REAR PLANETARY SUN GEAR
11 - REAR PLANETARY ANNULUS GEAR
24 - FREEWHEELING CLUTCH F2
12 - DRIVING CLUTCH K3
25 - INPUT SHAFT
13 - FRONT PLANETARY CARRIER
26 - OUTPUT SHAFT
A - ENGINE SPEED
B - TRANSMISSION INPUT SPEED
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AUTOMATIC TRANSMISSION - NAG1 - SERVICE INFORMATION
21 - 701
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