Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 431
REVERSE GEAR POWERFLOW
Fig. 12 Reverse 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
21 - 19
Torque from the torque converter is increased via
the input shaft (25) and all three planetary gearsets
and transferred with reversed direction of rotation to
the output shaft (26). (Fig. 12) (Fig. 13)
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 planetary carrier (15) is held against the hous-
ing by the engaged multiple-disc holding clutch B3
(5). The annulus gear (11) turns at a reduced speed
due to the mechanical connection to the front plane-
tary carrier (13). The planetary gears (19) turn
between the annulus gear (11) and the sun gear (23).
The direction is reversed by the held planetary car-
rier (15) so that the sun gear (23) turns in the oppo-
site direction to the running direction of the engine.
Center Planetary Gear Set
The annulus gear (10) is held against the housing
by the multiple-disc holding clutch B3 (5) via the
mechanical connection to the planetary carrier (15).
The sun gear (22) turns backwards due to the
Fig. 13 Reverse 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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engaged multiple-disc clutch K3 (12). The planetary
gears (18) turn on the fixed annulus gear (10) and
increase the torque from the sun gear (22) to the
planetary carrier (14). The output shaft (26) con-
nected to the planetary carrier (14) turns at a
reduced speed in the opposite direction to the run-
ning direction of the engine.
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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REVERSE GEAR POWERFLOW - LIMP IN
Fig. 14 Reverse Gear Powerflow - Limp In or 4WD Low Range
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 - FIXED PARTS
C - FIRST GEAR RATIO
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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