Mercedes-Benz Sprinter / Dodge Sprinter. Service manual — part 430
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. (Fig. 8) (Fig. 9)
Front Planetary Gear Set
The planetary carrier (13) and sun gear (21) are
connected via the engaged multiple-disc clutch K1
(7). The planetary 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 connec-
tion 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.
Fig. 9 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
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FIFTH GEAR POWERFLOW
Fig. 10 Fifth 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
D - SECOND GEAR RATIO
B - TRANSMISSION INPUT SPEED
E - THIRD GEAR RATIO
C - FIRST GEAR RATIO
F - FIXED PARTS
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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Torque from the torque converter is increased via
the input shaft (25) and all three planetary gearsets
and transferred to the output shaft (26). (Fig. 10)
(Fig. 11)
Front Planetary Gear Set
The annulus gear (8) is driven by the input shaft
(25). The sun gear (21) is held against the housing by
the locked freewheel F1 (20) during acceleration and
via the engaged multiple-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.
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 at a reduced speed due
to the mechanical connection with the front plane-
tary carrier (13). The 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.
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)
transfers
an
Fig. 11 Fifth 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
D - SECOND GEAR RATIO
B - TRANSMISSION INPUT SPEED
E - THIRD GEAR RATIO
C - FIRST GEAR RATIO
F - FIXED PARTS
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increased speed to the sun gear (22) due to the con-
nection with the sun gear (23). The planetary pinion
gears (18) turn between the annulus gear (10) and
the sun gear (22). The speed of the planetary carrier
(14) and the output shaft connected to the planetary
carrier (5) lies between that of the annulus gear (10)
and the sun gear (22). This provides a step-up ratio.
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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