Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 428

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. 2) (Fig.
3)

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 annulus gear (11) turns at a reduced speed

due to the mechanical connection to the front plane-
tary carrier (15). The sun gear (23) is held against
the housing by the engaged multiple-disc holding
clutch B2 (6), by the locked freewheel F2 (24) during
acceleration and by the engaged multiple-disc clutch
K3 (12) during deceleration. The planetary gears (19)
turn on the fixed sun gear (23) and increase the
torque from the annulus gear (11) to the planetary
carrier (15). The planetary carrier (15) moves at a
reduced speed in the running direction of the engine.

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

Fig. 3 First 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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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 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.

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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION

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SECOND GEAR POWERFLOW

Fig. 4 Second 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 - FIXED PARTS

C - FIRST GEAR RATIO

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Torque from the torque converter is increased via

the input shaft (25) and the center and rear plane-
tary gearset and transferred to the output shaft (26).
(Fig. 4) (Fig. 5)

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 blocked and
turns as a closed unit at the input speed due to the
mechanical connection of the annulus gear (8) and
input shaft.

Rear Planetary Gear Set

The annulus gear (11) turns at the input speed as

a result of the mechanical connection to the front
planetary carrier (13). The sun gear (23) is held

against the housing by the engaged multiple-disc
holding clutch B2 (6), by the locked freewheel F2 (24)
during acceleration and by the engaged multiple-disc
clutch K3 (12) during deceleration. The planetary
pinion gears (19) turn on the fixed sun gear (23) and
increase the torque from the annulus gear (11) to the
planetary carrier (15). The planetary carrier (15)
moves at a reduced speed in the running direction of
the engine.

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

Fig. 5 Second 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 - FIXED PARTS

C - FIRST GEAR RATIO

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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION

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