SsangYong Musso. Manual - part 469

AUTOMATIC TRANSMISSION  5A-53

5A-54  AUTOMATIC TRANSMISSION

POWER FLOW - DRIVE 3 AND MANUAL 3

In Drive 3 and Manual 3, transmission drive is via the input shaft to the forward clutch cylinder. The elements of the
transmission function as follows :

!

The C2 clutch is engaged to drive the forward sun gear.

!

The C1 clutch is engaged to drive the planet carrier.

!

The forward sun gear and the planet carrier are driven clockwise at the same speed therefore there is no

relative motion between the sun gear and the pinions.

!

The ring gear and output shaft are driven in a clockwise or forward direction at input shaft speed.

!

The C4 clutch is applied to bypass the 3-4 OWC and provide engine braking on overrun.

Control

To maintain this arrangement in the steady state solenoids and valves are activated as follows:

!

Solenoid S1 is switched Off. S2 is switched Off.

!

With S1 and S2 switched Off, the 2-3 and 3-4 shift valves are held in the third gear position by line 500

pressure.

!

The 1-2 shift valve is held in the third gear position by S1-S2 oil pressure.

!

2nd oil (line pressure) from the 1-2 shift valve is directed to the band apply regulator valve. and to the 2-3 shift

valve.

!

The band apply regulator valve supplies 2nd oil (regulated to line pressure multiplied by the valve ratio) to the

band apply feed (BAF) circuit.

!

Band apply feed oil is directed to:

- The outer apply area of the front servo

- The 1-2 shift valve to provide an exhaust port when the transmission is shifted to first gear

- The 3-4 shift valve for use when the transmission is shifted into fourth gear

!

2nd oil at the 2-3 shift valve is directed to the 3rd oil circuit.

!

3rd oil from the 2-3 shift valve is directed to the clutch apply regulator valve, and to the 4-3 Sequence Valve.

!

The clutch apply regulator valve supplies oil (regulated to line 500 pressure multiplied by the valve ratio) to the

clutch apply feed (CAF) circuit.

! 

The CAF oil is directed to:

- The C1 clutch

- The C1 bias valve

- The 4-3 sequence valve

!

At the 4-3 sequence valve the CAF oil becomes band 1 release feed (B1R-F) oil, and is directed through the

3-4 shift valve to the spring end of the 4-3 sequence valve, and to the release side of the front servo piston to
hold band 1 off.

!

Drive (line pressure) is routed through the 3-4 shift valve to apply the C4 clutch.

Refer to figure 5.6 and table 5.7.

Table 5.7 - Engaged Elements - Drive 3 and Manual 3

Gear State

Drive 3 and Manual 3

C1

X

C2

X

C3

-

C4

X

B1

-

B2

-

1-2

OWC

-

3-4

OWC

X

LU

CLUTCH

-

ELEMENTS ENGAGED

AUTOMATIC TRANSMISSION  5A-55

5A-56  AUTOMATIC TRANSMISSION

POWER FLOW - DRIVE 3 LOCK UP AND MANUAL 3 LOCK UP

In Drive 3 Lock Up and Manual 3 Lock Up, transmission drive is the same as for Drive 3 but with the application of the
converter lock up clutch to provide positive no-slip converter drive.

Control

Control for Drive 3 Lock Up and Manual 3 Lock Up is the same as for Drive 3 with the addition of the converter clutch
circuit activated by solenoid S7.

!

When S7 is switched On, S7 feed oil to the converter clutch control valve is switched off and allowed to exhaust

through the S7 solenoid. This allows the valve to move to the clutch engage position.

!

Regulated apply feed oil, derived from line 500 oil at the converter clutch regulator valve, is directed by the

converter clutch control valve to the engage side of the converter clutch.

!

Converter clutch release oil is exhausted at the converter clutch control valve.

!

Converter feed oil is re-routed by the converter clutch control valve directly to the oil cooler and lubrication

circuit.

Refer to figure 5.7and table 5.8.

Table 5.8 - Engaged Elements - Drive 3 Lock Up and Manual 3 Lock Up

Gear State

Drive 3 Lock Up and Manual 3

Lock Up

C1

X

C2

X

C3

-

C4

X

B1

-

B2

-

1-2

OWC

-

3-4

OWC

X

LU

CLUTCH

X

ELEMENTS ENGAGED