2003 SSANGYONG MUSSO torque

5A-64 AUTOMATIC TRANSMISSION
Default Transmission Operating Modes
The TCU relies on accurate information from its inputs and complete control of its outputs to effectively control the
transmission. To ensure that it has both valid inputs and functioning outputs, the TCU carries out both hardware and
software fault detection routines. The TCU will respond to any faults detected by adopting the operating modes which
are detailed below.
The following symptoms of faults are the most obvious results of each fault under ‘normal ’ conditions.
There is always the possibility that a fault may not be detected. If undetected fault conditions are present, the
operation of the transmission is difficult to predict.
1 Throttle Fault
All shifts will occur as if a nominal throttle (approx. 44%) were applied for shift scheduling.
All shifts will be firm as full throttle and hence high engine torque is assumed.
The torque converter will be unlocked at all times.
All downshifts initiated by the shift lever will occur as though they were ‘automatic ’ shifts. That is the engine
braking effect will not occur until near the end of the shift.
Line pressure will always stay high (solenoid 6 OFF) to cope with assumed high throttle/torque.
If a fault is undetected, the percent throttle is most likely to be interpreted as higher than actual, resulting in late
upshifts, early downshifts, firm shifting and a harsh 3-1 shift when stopping.
2 Throttle Not Learnt Fault
The transmission operates from default throttle calibration values which results in the evaluation of the throttle being
higher (more open) than it is. There(ore at zero throttle settings, the transmission may calculate that sufficient throttle
opening is present to justify high line pressure and switch solenoid 6 to OFF. Other symptoms are:
a. late upshifts and
b. lock-up maintained at zero throttle when the vehicle speed is sufficiently high.
3 Engine Speed Fault All shifts will be firm because an engine speed corresponding to peak engine torques is assumed.
If a fault is undetected, the engine speed is likely to be interpreted as stalled resulting in soft shifting possibly with an end of shift bump.
4 Vehicle Speed Sensor Fault
All shifts will be controlled by the shift lever with skip downshifts disabled and downshifts only allowed if the
engine speed is low. Fourth gear will be inhibited.
The torque converter will be unlocked at all times.
If a fault is undetected, the vehicle is likely to be interpreted as being stationary resulting in first gear operation at all
times. Note that speedometer transducer faults are likely to cause the vehicle ’s speedometer to become inoperative.
5 Gear Lever Fault (Inhibitor/PRNDL Switch) The gear lever is assumed to be in the Drive position.
The transmission is limited to 2nd,3rd, and R gears only.
The rear band will apply at all times when the lever is shifted to P, R or N. (B2 inhibition and reverse lockout
protection is disabled.)
The torque converter will be unlocked at all times.
Manually (gear lever) initiated downshifts will not be available.
If a fault is undetected, the gear lever position is likely to be interpreted as being higher than actual. Where Park is the
highest position and Manual 1 is the lowest, the result being the availability of higher gears than selected by the gear
lever.

5A-66 AUTOMATIC TRANSMISSION
Diagnostic Trouble Messages The diagnostic trouble messages generated by the TCU and their possible causes are listed in table 6.1.3.
Table 6.1.2 - Transmission Operations for On/Off Solenoid Faults
Transmission Operation
First gear instead of second and fourth gear instead of third. This results in a 1
4 shift as the vehicle accelerates from rest.
Second gear instead of first and third gear instead of fourth.This results in second gear starts.
Fourth gear instead of first and third gear instead of second.This results in fourth gear starts.
Second gear instead of third and first gear instead of fourth. This results in a 1
2 then 2
1 (overrun) downshift as the vehicle
accelerates from rest. The following shifts become poor:1
3, 1
4, 2
1 2
3, 2
4, 4
2, 4
1.
The following shifts become poor: 3
4, 4
3, 3
2.
There may be slippage in the gears during torque converter locking. The following shifts become poor:1
2, 1
3, 1
4, 2
3, 2
4, 3
1, 3
2 (All Including Manual), 3
4,
4
1,4
3.
The following shifts become poor:2
4, 3
2.
There may be slippage in the gears during torque converter locking.Line pressure always high.Line pressure always low thus resulting in risk of slippage in gears.
Torque converter always unlocked.
Torque converter always locked in 3rd and 4th gears, causing thevehicle to shudder at lower speeds,
Condition
Always ON Always OFF Always OFF Always ON Always OFF Always ON Always OFF Always ON Always OFF Always ON Always OFFAlways ONSolenoid 1 2 34 6 7

5A-80 AUTOMATIC TRANSMISSION6. Switch off the engine and raise the vehicle on the hoist, if applicable, ensuring that the vehicle is level.
7. Three minutes after the engine has stopped, but no longer than one hour, remove the filler pump, The correct level is reached when ATF is aligned with the bottom of the filler hole. If the correct level is not reached, then add
a small quantity of ATF to the correct level.
8. Replace the transmission filler plug and clean all remnants of ATF on the transmission and vehicle.
9. Tighten the transmission filler plug to specification.
Checking, Adding Fluid and Filling - Drained or Dry Transmission
To set the correct fluid level proceed as follows. 1. Set the transmission selector to Park and switch the engine off.
2. Raise the vehicle on a hoist (or leave over a service pit).
3. Clean all dirt from around the service fill plug prior to removing the plug, Remove the oil service fill plug. Clean the fill plug and check that there is no damage to the ‘O’ ring. Install the filler pump into the filler hole.
4. Lower the vehicle with the filler pump still connected and partially fill the transmission. This typically requires approximately :
a. If the transmission torque converter is empty:
9.0 litres - 4WD9.0 litres - RWD
b. If the transmission torque converter is full: 4.5 litres - 4WD4.5 litres - RWD
5. Start the vehicle in Park with the Parking brake and foot brake applied with the engine idling, cycle the transmission gear selector through all positions, adding ATF until gear application is felt.
6. Then add an additional 0.5 litres of ATF.
7. Switch off the engine and raise the vehicle on the hoist. Remove the filler pump and replace the filler plug. The plug shall be tightened to specification.
8. The vehicle is then to be driven between 3.5 and 4.5 kilometers at light throttle so that the engine does not exceed 2500 rpm. This should result in the transmission temperature being in the range 50 to 60 °C.
9. With the engine idling, cycle the transmission selector through all gear positions with the brake applied.
10. Stop the engine. Raise the vehicle on the hoist, if applicable ensuring the vehicle is level.
11. Three minutes after the engine has stopped, but no longer than one hour, remove the filler plug. The correct level is reached when ATF is aligned with the bottom of the filler hole. If the correct level is not reached, then add
a small quantity of ATP to the correct level.
12. Replace the transmission filler plug and clean all remnants of ATF on the transmission and vehicle. Tighten the transmission Filler plug to specification.
ELECTRONIC ADJUSTMENTS Idle Speed Adjustment
Carry out the adjustments to the idle speed as detailed in the workshop manual.
Throttle Position Calibration
Should the throttle position data stored in the TCU be lost or be out of specification, as indicated by a diagnostic
trouble message, it may be re-established by the following procedure. Check that the hot engine idle speed is within specification.
Allow the engine to idle in ‘Drive ’ for 60 seconds with the air conditioner (if fitted) turned off. The closed throttle
reference point in the TCU has now been set.
Switch the engine off but leave the ignition on. Hold the accelerator pedal on the floor for 60 seconds. The wide open
throttle reference point in the TCU has now been set.

5A-82 AUTOMATIC TRANSMISSIONMAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
Tightening Torque 70 - 80 Nm
5. Remove the rear propeller shaft .
Installation Notice
REMOVAL & INSTALLATION OF TRANSMISSION
1. Disconnect the negative battery cable.
2. Disconnect the connectors from transfer case.
3. Disconnect the speedometer connector from transfer case.
4. Disconnect the inhibitor and Sear position sensor connector.
6. Unscrew the eight bolts and two nuts, and remove the cross member.

AUTOMATIC TRANSMISSION 5A-83
Tightening Torque 70 - 80 Nm
11. Remove the two pipes for oil cooler. Installation Notice
Tightening Torque 24.5 - 34.3 Nm
12. Remove the service hall cover on torque converter.
13. Put the alignment mark for installation, and unscrew the six mounting bolts for torque converter from drive plate through the service hole (arrow) by rotating the engine
and remove the torque converter. Installation Notice
Tightening Torque 42 Nm
7. Remove the rear propeller shaft.
Installation Notice
8. Unscrew the five bolts and remove the transfer case.
9. Disconnect the 10-Pins Plug connector from transmission.
10. Separate the locking clip on shift lever and remove the shift rod.Notice Removal and installation performed when the shift procedure should be lever is in “D” range.
Screw the six bolts mounting the torque converter through the service hole by using a mirror and rotating the engine.

5A-84 AUTOMATIC TRANSMISSION
Tightening Torque 55 - 65 Nm
14. Remover the starter.
15. Unscrew the eight transmission housing bolts and remove
the transmission assembly.Installation Notice Be careful not to drop the torque converter while removing the transmission.
16. Installation should follow the removal procedure in the reverse order.

5A-94 AUTOMATIC TRANSMISSION
ASSEMBLY PROCEDURE The transmission is assembled in modular fashion and details of assembly for each module are given under the appropriatesubject. Refer to table 8.1 (at the end of Section 8.3) for the torque specifications to be applied, and to table 9.10 in section 9.6 for details of all special tools required, when performing
assembly procedures. Technicians overhauling these
transmissions will also require a selection of good quality Torxbit sockets, in particular numbers 30,40 and 50, and an 8 mm,10 mm and 12 mm double hex socket.
Transmission Notice
1. Ensure that the B1R circlip is fitted to the case. (If this is notfitted, the valve will peen its way into and through the separator plate.)
2. Ensure that the ‘E’ clip is fitted to the cross shaft.
3. Ensure that all aspects of the parking mechanism are working.
To assemble the transmission, proceed as follows:
1. Turn the transmission case upside down on the bench and mount it to the transmission cradle No.0555-331895.
2. Install all fittings, plugs and the breather, applying a sealant where applicable, Tighten the fittings to specifications.
Ensure that the breather is clear, and check that the lube fitting in the rear of the case is fitted and clear of obstruction.
3. Assemble the B1R valve and spring, and secure with the irclip. Refer to Ensure that the circlip is completely seatedin its groove.
4. Install the rear servo lever and pivot pin.
Notice The lever must pivot freely on its pin.

5A-96 AUTOMATIC TRANSMISSION9. Check that the cam collar slides freely on the rod.
10. Insert the cross shaft into the case, from the side opposite to the inhibitor switch, then install the anti-rattle spring on the shaft.
11. Position the manual valve detent lever, aligning it with the cross-shaft bore in the case.
12. Push the shaft through the detent lever until it starts in the detent lever side of the case.
13. Install the detent lever drive pin in the shaft using tool No. 0555-331897 with the adaptor over the pin.
14. Press the pin into the shaft until the tool bottoms.
15. Remove the tool and fit the spring retaining circlip to the shaft.
16. Install the new cross shaft seals using tool No. 0555-
331894.
17. Install the inhibitor switch on the case. Torque the screws as per specifications. Press the pin into the shaft until the
tool bottoms (4WD models) using tool No.0555-332942.
18. Thoroughly check the terminal wiring loom for condition and continuity.
19. Position the loom and locate the solenoid 7 contact andterminal in the pump mounting flange at the front of the case. The solenoid 7 wire is routed under the park rodand cross shaft in the case.