SsangYong Stavic / SsangYong Rodius (2005 year). Manual - part 302

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4A

PLANETARY GEAR SET

Relatively high step-down ratio

Ring gear locked

Sun gear driving (clockwise)

Planet gears driven (rotating counterclockwise)

Planet carrier driven (revolving clockwise)

Relatively low step-down ratio

Sun gear locked

Ring gear driving (clockwise)

Planet gears driven (rotating clockwise)

Planet carrier driven (revolving clockwise)

Direction reversal and step-down ratio

Planet carrier locked

Sun gear driving (clockwise)

Planet gears driven (counterclockwise)

Ring gear driven (counterclockwise)

Gear ratio: teeth of sun gear / teeth of ring gear

Relatively high

step-down ratio

Relatively low

step-down ratio

Direction reversal and

step-down ratio

Output

Locked

Locked

Output

Output

Input

Ring gear

Pinion gear

Sun gear

Planetary gear carrier

Input

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4A

MULTIPLE-DISC CLUTCH

Location

Three multiple-disc clutches, the front, middle and rear multiple-disc clutches K1, K2 and K3, are located in the plan-
etary gear sets in the transmission housing.

Funtion and description

A multiple-disc clutch consists of a number of internally toothed discs (10) on an internally toothed disc carrier and
externally toothed discs (9) on an externally toothed disc carrier.

If the piston (C1a) on multiple-disc clutch K1 is subjected to oil pressure, it presses the internal and external discs of the
disc set together. The sun gear (V1) is locked with the planet carrier (V3) via the externally toothed disc carrier (C1b) and
the internally toothed disc carrier (C1c). The front planetary gear set is thus locked and turns as a closed unit. If the
multiple-disc clutch C2 is actuated via the piston (C2a), the piston compresses the disc set. The ring gear (V4) of the
front planetary gear set is locked with the ring gear (M4) of the middle planetary gear set via the externally toothed disc
carrier (K2b) and the middle planet carrier (M3) on which the internally toothed discs are seated. Ring gear (V4) and ring
gear (M4) turn at the same speed as the input shaft (1). If the multiple-disc clutch C3 is actuated via the piston (C3a), the
piston compresses the disc set. The sun gear (M1) of the middle planetary gear set is locked with the sun gear (H1) of
the rear planetary gear set via the externally toothed disc carrier (C3b) and the internally toothed disc carrier (C3c). Sun
gear (M1) and sun gear (H1) turn at the same speed.

1. Input shaft

9. Externally toothed disc

10. Internally toothed disc

H1. Rear sun gear

C1a. Piston C1

C1b. Externally toothed disc carrier C1

C1c. Internally toothed disc carrier C1

C2a. Piston C2

C2b. Externally toothed disc carrier C2

C3a. Piston C3

C3b. Externally toothed disc carrier C3

C3c. Internally toothed disc carrier C3

M1. Middle sun gear

M3. Middle planet carrier

M4. Middle ring gear

V1. Front sun gear

V3. Front planet carrier

V4. Front ring gear

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4A

FREEWHEEL

Location

Freewheels are installed in the front planetary gear set between the sun gear and the stator shaft, and in the rear
planetary gear set between the sun gear and the intermediate shaft.

Function and description

The freewheel consists of an outer race (1), an inner race (2), a number of locking elements (3) and a cage (4) for these
locking elements.

If the inner race (2) of the freewheel is locked and the outer race (1) turns in direction “A”, the locking elements (3) adopt
a diagonal position on account of their special contours, allowing the freewheel function.

The outer race (1) slides over the locking elements (3) with negligible friction. If the rotation of the outer race (1) changes
to direction “B”, the locking elements (3) stand up and lock the outer and inner races (1, 2) together.

1. Outer race

2. Inner race

3. Locking elements

4. Locking element cage

A. Rotation direction “A”

B. Rotation direction “B”

V1/H1. Front or rear sun gear

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4A

SENSORS AND CONTROLS

Components

Valve body assembly

1. Cap

2. Socket bolt (M6 x 32)

3. Socket bolt (M6 x 30)

4. Leaf spring

9. 1-2/4-5 shift solenoid valve

10. 3-4 shift solenoid valve

11. Electronic control module

12. Lockup clutch control solenoid valve

5. Lockup PWM solenoid valve

6. 2-3 shift solenoid valve

7. Shift pressure (SP) solenoid valve
8. Modulating pressure (MP) solenoid valve