2003 SSANGYONG MUSSO clutch

SECTION 5A
AUTOMATIC TRANSMISSION
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 5A-2
Model Part Numbers and Applications . . . . . . 5A-2
Model Specifications . . . . . . . . . . . . . . . . . . . . 5A-2
Clutch Pack Details . . . . . . . . . . . . . . . . . . . . . 5A-3
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . 5A-4
Special Tools Table . . . . . . . . . . . . . . . . . . . . . 5A-4
Schematic and Routing Diagrams . . . . . . . . 5A-5
TCU Circuit (Diesel) . . . . . . . . . . . . . . . . . . . . 5A-5
TCU Circuit (Gasoline) . . . . . . . . . . . . . . . . . . 5A-6
Shift Pattern Diagram . . . . . . . . . . . . . . . . . 5A-7
661LA Normal Mode . . . . . . . . . . . . . . . . . . . . 5A-7
661LA Power Mode . . . . . . . . . . . . . . . . . . . . 5A-8
662LA Normal Mode . . . . . . . . . . . . . . . . . . . . 5A-9
662LA Power Mode . . . . . . . . . . . . . . . . . . . 5A-10
662LA Low Mode . . . . . . . . . . . . . . . . . . . . . 5A-11
E32 Power Mode . . . . . . . . . . . . . . . . . . . . . 5A-12
E32 Normal Mode . . . . . . . . . . . . . . . . . . . . . 5A-13
E32 Low Mode . . . . . . . . . . . . . . . . . . . . . . . 5A-14
E23 Power Mode . . . . . . . . . . . . . . . . . . . . . 5A-15
E23 Normal Mode . . . . . . . . . . . . . . . . . . . . . 5A-16
E23 Low Mode . . . . . . . . . . . . . . . . . . . . . . . 5A-17
Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5A-18
Operator Interfaces . . . . . . . . . . . . . . . . . . 5A-20
Gear Select Lever Operation . . . . . . . . . . . . 5A-20
Driving Mode Selector . . . . . . . . . . . . . . . . . 5A-21
Control Systems . . . . . . . . . . . . . . . . . . . . . 5A-22
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-22
Electronic Control System . . . . . . . . . . . . . . . 5A-22
Hydraulic Control System . . . . . . . . . . . . . . . 5A-31
Power Train System . . . . . . . . . . . . . . . . . . 5A-42
Torque Converter . . . . . . . . . . . . . . . . . . . . . 5A-43
Clutch Packs . . . . . . . . . . . . . . . . . . . . . . . . . 5A-44Bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-45
One Way Clutches . . . . . . . . . . . . . . . . . . . .
5A-45
Planetary Gear Set . . . . . . . . . . . . . . . . . . . . 5A-45
Parking Mechanism . . . . . . . . . . . . . . . . . . . 5A-46
Power Flows . . . . . . . . . . . . . . . . . . . . . . . . 5A-47
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-47
Power Flow - Park and Neutral . . . . . . . . . . . 5A-48
Power Flow - Reverse . . . . . . . . . . . . . . . . . . 5A-49
Power Flow - Manual 1 . . . . . . . . . . . . . . . . . 5A-50
Power Flow - Drive 1 . . . . . . . . . . . . . . . . . . . 5A-51
Power Flow - Drive 2 and Manual 2 . . . . . . . 5A-52
Power Flow - Drive 3 and Manual 3 . . . . . . . 5A-54
Power Flow - Drive 3 Lock Up and Manual
3 Lock Up . . . . . . . . . . . . . . . . 5A-56
Power Flow - Drive 4 (Overdrive) . . . . . . . . . 5A-57
Power Flow - Drive 4 Lock Up . . . . . . . . . . . . 5A-59
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . 5A-60
Diagnostic System . . . . . . . . . . . . . . . . . . . . 5A-60
Mechanical Tests . . . . . . . . . . . . . . . . . . . . . 5A-69
Self Diagnosis Test . . . . . . . . . . . . . . . . . . 5A-75
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 5A-79
Hydraulic System . . . . . . . . . . . . . . . . . . . . . 5A-79
Transmission Fluid Test Procedure . . . . . . . . 5A-79
Electronic Adjustments . . . . . . . . . . . . . . . . . 5A-80
Maintenance and Repair . . . . . . . . . . . . . . 5A-82
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . 5A-82
Removal and Installation of Transmission . . . 5A-82
Unit Repair . . . . . . . . . . . . . . . . . . . . . . . . . 5A-85
Rebuild Warnings . . . . . . . . . . . . . . . . . . . . . 5A-85
Disassembly Procedure . . . . . . . . . . . . . . . . 5A-85
Assembly Procedure . . . . . . . . . . . . . . . . . . . 5A-94
Front and Rear Band Adjustment . . . . . . . . 5A-128

AUTOMATIC TRANSMISSION 5A-3
CLUTCH PACK DETAILS
C1Composition Steel
C2
Composition Steel
C3
CompositionSteel
C4 CompositionSteel
0574-000002
5
5(2)
5
4(2)
4
4(2)
3
4(1)0574-000001, 0574-000004, 0574-000005
4
6(2)
4
5(2)
3
5(2)
3
4(1)
Note : Numbers in brackets indicate number of selective thickness steel plates required to achieve specifed
clutch pack clearance

5A-4 AUTOMATIC TRANSMISSIONSPECIAL TOOLS
SPECIAL TOOLS TABLE
Part Number
0555 - 332083 0555 - 3360460555 - 3362560555 - 3362570555 - 336258 0555 - 336259 0555 - 3362600555 - 3362610555 - 3362620555 - 336263 0555 - 336264 0555 - 3362650555 - 3362660555 - 3362670555 - 336268 0555 - 336269 0555 - 3362700555 - 332895Description
Solenoid / Thermistor, Electronic Tester
Solenoid, Bench Tester
Transmission Bench Cradle Pump Puller
Pin Remover / Installer Tool (Cross Shaft / Detent Lever)Clutch Spring CompressorClutch Pack Clearance Kit
Seal Removal Tool (Cross - Shaft) Oil Seal Dolly (Cross - Shaft)Assembly BulletSeal CompressorPin Press Seal Dolly
Alignment ToolPump Seal DollyEnd Float AdaptorEnd Float Shaft
Locknut Crimping Tool (W-Car Only)

AUTOMATIC TRANSMISSION 5A-21
Downshift Type
RANGE ‘1’ (MANUAL ‘1’):
RANGE ‘2’ (MANUAL ‘2’):
RANGE ‘3’ (MANUAL ‘3’):
RANGE ‘D’ (DRIVE):
RANGE ‘N’ (NEUTRAL):
RANGE ‘R’ (REVERSE):
RANGE ‘P’ (P ARK):Inhibited Above
First gear operation only with inhibited engagement as a function of vehicle speed. Engine braking is applied with reduced throttle.
First and second gear operation with inhibited engagement of second gear, as
a function of vehicle speed. Engine braking is applied with reduced throttle.
First, second and third gear operation with an inhibited third gear engagement
at high vehicle speed. Refer to the vehicle owner’ s manual.Engine braking is applied with reduced throttle.
First, second, third and fourth gear operation. First to second (1-2), first to third
(1-3), second to third (2-3), second to fourth (2-4), third to fourth (3-4), fourth
to third (4-3), fourth to second (4-2), third to second (3-2), third to first (3-1)
and second to first (2-1), shifts are all available as a function of vehicle speed,throttle position and the time rate of change of the throttle position (forced
downshift). Lockup clutch may be enabled in 3rd and 4th gears depending on
vehicle type. Refer to the owner’ s manual.
Rear band applied only, with inhibited engagement as a function of vehicle
speed, engine speed and throttle position. The inhibitor switch allows the en-gine to start.
Reverse gear operation, with inhibitor engagement as a function of vehicle
speed, engine speed and throttle position. The inhibitor switch enables reverse lamp operation.
Rear band applied only, with inhibited engagement as a function of vehicle
speed, engine speed and throttle position. The transmission output shaft is
locked. The inhibitor switch allows the engine to start.
Table 2.1 - Gear Selections DRIVING MODE SELECTOR
The driving mode selector consists of a mode selection switch and indicator light. The driving mode selector is
located on the centre console. See figure 2,1.
The schedules available to be selected vary with vehicle types. Typically the driver should have the option to select
between ‘NORMAL’ , ‘POWER’ or ‘WINTER’ modes.
When ‘NORMAL’ mode is selected upshifts will occur to maximise fuel economy and the indicator lights remain
extinguished. When ‘POWER’ mode is selected upshifts will occur to give maximum performance and the ‘POWER’
mode indicator light is swi tched on. When ‘WINTER’ mode is selected, starting at second gear is facilitated, the
‘WINTER’ mode indicator light is switched on and the ‘POWER’ mode indicator light is switched off.
Refer to the vehicle owner ’ s manual for specific modes for each vehicle type.

5A-22 AUTOMATIC TRANSMISSIONCONTROL SYSTEMS
GENERAL
There are two control systems associated with the transmission. The electronic control system monitors vehicle
parameters and adjusts the transmission performance. The hydraulic control system implements the electronic controlsystem commands. ELECTRONIC CONTROL SYSTEM
The electronic control system is comprised of sensors, a TCU and seven solenoids. The TCU reads the inputs, and
under software control activates the outputs according to values stored in read only memory (ROM).
The TCU controls the hydraulic control system. This control is via the hydraulic valve body, which contains seven
electro-magnetic solenoids. Six of the seven solenoids are used to control the line pressure, operate the shift valves
and the torque converter lock-up clutch, and to turn on and off the two regulator valves (The two regulator valvescontrol the shift feel.).
The seventh solenoid is the proportional or variable pressure solenoid (VPS) which works with the two regulator
valves to control shift feel.
Figure 3.1 details a typical TCU control system schematic.
The individual component locations, operation and specifications which make up the electronic control subsystem are covered in this section.
Figure 3.1 - Typical TCU Control System Schematic

5A-28 AUTOMATIC TRANSMISSION
Table 3.4 - Solenoid States and Functions
Table 3.5 - Solenoid Logic for Static Gear States
Solenoids 1 and 2 Solenoids 3 and 4 Solenoid 5 Solenoid 6 Solenoid 7S1 and S2 are normally open On/off solenoids that set the selected gear.
These solenoids determine static gear position by operating the shift valves.
Refer to table 3.5. Note that S1 and S2 solenoids also send signal pres- sure to allow or prohibit rear band engagement.
S3 and S4 are normally open On/off solenoids that combine to control
shift quality and sequencing. S3 switches the clutch regulator valve off oron. S4 switches the front band regulator valve off or on. S5 is a variable force solenoid that ramps the pressure during gear changes. This solenoid provides the signal pressure to the clutch and
band regulator, thereby controlling the shift pressures.
S6 is a normally open On/off solenoid that sets the high/low level of linepressure, Solenoid off gives high pressure.
S7 is a normally open On/off solenoid that controls the application of the converter clutch. Solenoid on activates the clutch.
S2
ON ON
OFFOFFOFF OFF OFFS1
ON
OFF OFF ON
OFF OFF OFF
Gear
1st
2nd 3rd
4th
Reverse Neutral Park

AUTOMATIC TRANSMISSION 5A-29
Table 3.6- Solenoid Operation During Gearshifts
To Initiate Shift
S1 OFF S4 ONS1 OFF S2 OFF S3 ONS4 ONS2 OFF
S3 ON S4 ON S2 OFFS3 ONS4 ONS1 ON S4 ON S4 ON S3 ON S3 ON S4 ON S2 ON S4 ON S3 ON S4 ON S4 ON S7 ON To Complete Shift
S4 OFF S3 OFF S4 OFF S3 OFF S4 OFF S3 OFF S4 OFF S4 OFF S1 OFF S4 OFFS1 OFFS2 ON S3 OFF S2 ONS3 OFFS4 OFFS4 OFF S1 ON S2 ONS3 OFF S4 OFF S1 ONS4 OFF S7 OFFTypical S5 Current Ramp
750mA to 600mA 850mA to 750mA 850mA to 750mA 700mA to 500mA 750mA to 600mA 750mA to 900mA 750mA to 950mA 600mA to 1000mA 600mA to 450mA @ 20 kph. 550mA to 400mA @ 60 kph. 800mA to 650mA @ 100 kph. 700mA to 950mA 800mA to 950mA 700mA to 400mA 600mA to 100mA
Shift
1-2 1-3 1-4 2-3 3-4 4-3 4-2 4-1 3-2 3-1 2-1
Conv. Clutch ON OFF

5A-30 AUTOMATIC TRANSMISSION
Solenoid Valve Symbols (On/off Solenoids)
The solenoid symbol shown adjacent to each solenoid on the
hydraulic system schematics indicates the state of the oil flow
through the solenoid valve with the power On or 0ff. Refer to
figure 3.6 for the On/off operational details of NO solenoidvalves. Normally Open (NO) Solenoid POWER ON
Line 500 port is closed. The output port is open to exhaust at the solenoid valve. POWER OFF
The exhaust port is closed. The output port is open to line 500,Figure 3.6- Normally Open (NO) Symbols
Variable Pressure Solenoid Multiplexing System
Friction element shifting pressures are controlled by the variable pressure solenoid (VPS).
Line pressure is completely independent of shift pressure and is a function of throttle position, gear state and enginespeed.
S5 is a proportional or variable pressure solenoid that provides the signal pressure to the clutch and band regulator
valves thereby controlling shift pressures.
VPS pressure is multiplexed to the clutch regulator valve, the band regulator valve and the converter clutch regulator
valve during automatic gearshifts.
A variable pressure solenoid produces a hydraulic pressure inversely proportional to the current applied. During a
gearshift the TCU applies a progressively increasing or decreasing (ramped) current to the solenoid. Current applied will vary between a minimum of 200 mA and a maximum of 1000 mA, Increasing current decreases output (55)
pressure. Decreasing current increases output (55) pressure.
Line 500 pressure, (approximately 440 to 560 kPa), is the reference pressure for the VPS, and the VPS outputpressure is always below line 500 pressure.
When the VPS is at standby, that is no gearshift is taking place, the VPS current is set to 200 mA giving maximum output pressure.
Under steady state conditions the band and clutch regulator valve solenoids are switched off. This applies full Line
500 pressure to the plunger and because Line 500 pressure is always greater than S5 pressure it squeezes the S5
oil out between the regulator valve and the plunger. The friction elements are then fed oil pressure equal to Line 500multiplied by the amplification ratio.
When a shift is initiated the required On/off solenoid is switched on cutting the supply of Line 500 to the plunger.
At the same time the VPS pressure is reduced to the ramp start value and assumes control of the regulator valve by
pushing the plunger away from the valve. The VPS then carries out the required pressure ramp and the timed shift is
completed by switching Off the On/off solenoid and returning the VPS to the standby pressure.
This system enables either the band or clutch or both to be electrically controlled for each gearshift. Mode Indicator Light
Depending on the application, the mode indicator light may be used to indicate the mode that has been selected or
if an overheat condition exists. The mode indicator light is usually located on the instrument cluster. Communication Systems CAN
The controller area network (CAN) connects various control modules by using a twisted pair of wires, to share
common information. This results in a reduction of sensors and wiring. Typical applications include using the engine
controller to obtain the actual engine speed and throttle position, and adding these to the network. The ABS controller
(if fitted) can be used to obtain the road speed signal. This information is then available to the TCU without anyadditional sensors.