3660 SSANGYONG KORANDO 2013 Service Manual

3660-01
1. ABBREVIATION
No Abbreviation Name
1 DTC Diagnostic trouble code
2 TCU Transmission control unit
3 ATF Automatic transmission fluid
4 DC Damper clutch
5 PCSV Pressure control solenoid valve
6 UD Under drive
7OD Over drive
8 LR Low reverse
9 LP Line pressure
10 SOL Solenoid
11 VFS Variable force solenoid
12 PG-A Input speed sensor
13 PG-B Output speed sensor

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The shiftable gear can be adjusted by pressing the
"UP (D+)" or "DOWN(D-)" switch when the gear
Shift lock release button
If the selector lever cannot be moved from
while pushing down this button with finger. For
safety, turn off the engine and depress the
brake pedal before the attempt.Shift up Shift down Tip switches on steering wheel
Meter cluster
This indicator shows the current position of
the gear.
Gear selector lever
Lever positions
P : Park
R : reverse
N : Neutral
D : DriveTip switch (manual shift switch)
The shiftable gear can be adjusted by
moving this switch to forward and rearward
position.
Selection of Manual/Automatic Shift Function
D: Automatic shift according to the driving condition
M: Manual shift

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4. COMPONENTS
HPT 6A/T (6F24)
One-way clutchTorque converter
(with slip lockup)
Oil pumpHarness
Valve bodySide gearDriven gear

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DescriptionsSize x
NumbersTightening torque
(Nm)
Automatic
transaxleBolt (oil lubrication pipe) 10 mm X 1 9.8 ~ 11.7Nm
Bolt (oil pump) 12 mm X 7 20.0 ~ 26.0Nm
Bolt (parking rod guide) 10 mm X 2 9.8 ~ 11.7Nm
Bolt (U/D brake retainer) T40 X 6 31.0 ~ 36.0Nm
Bolt (U/D brake chamber) T30 X 2 4.9 ~ 9.8Nm
Bolt (rear cover) 12 mm X 13 28.0 ~ 35.0Nm

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1. OVERVIEW
2WD4WD
The Model 6F24 6 speed automatic transaxle is electronically controlled. The control system is
comprised of the following components:
External transaxle control unit (TCU)
Input and output speed sensors
Six variable force solenoids(VFS) and two on/off solenoids
Torque converter
ATF temperature sensor -
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TCU controls the oil pressure for various internal clutches and brakes to select the gear. It also controls
the electronic elements, shift pressure and torque converter slip. If the system is defective, TCU provides
FMEC (Failure Mode Effect Control) to maintain the functionality of transaxle. This keeps the basic
function of transaxle (gear selection) even when there are failure in controls and power supply.
There are selector shaft position sensor (inhibitor switch) and oil temperature sensor in transaxle. In
manual mode, TCU receives the information from TGS (Transmission Gear Selector) through PCB
(Printed Circuit Board) when driver selects the manual shift mode. TCU communicates with other electric
control modules through CAN. In order to ensure a safe driving state and to prevent damage to the
automatic transmission, TCU switches to Limp-Home mode in the event of critical faults.

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2) Transaxle Cooling
The transaxle cooling system ensures rapid warm-up and constant operating temperature resulting in
reduced fuel consumption and refined shift quality.
It also includes a cooler by-pass within the hydraulic system to allow sufficient lubrication to the transaxle
drivetrain in the event of a blockage in the transaxle cooler.
3) Shift Strategy
Gear Change
Transaxle gear change is controlled by the
TCU. The TCU receives inputs from various
engine and vehicle sensors to select shift
schedules and to control the shift feel and
torque converter clutch (TCC) operation at each
gear change.
Coast down
Coast down down shifts occur at 0% pedal
when the vehicle is coasting down to a stop.
Torque Demand
Torque demand down shifts occur
(automatically) when the driver demand for
torque is greater than the engine can provide at
that gear ratio. If applied, the transaxle will
disengage the TCC to provide added
acceleration.

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1st Gear State
The 1st gear state will display on the
instrument cluster. Unlike the normal 1st gear,
engine braking will be available in this manual
1st state. -
2nd Gear State
The 2nd gear state will display on the
instrument cluster. 2nd gear has engine braking
available. -
3rd Gear State
The 3rd gear state will display on the
instrument cluster. 3rd gear has engine
braking available. -
4th Gear State
The 4th gear state will display on the
instrument cluster. 4th gear has engine
braking available. -
5th Gear State
The 5th gear state will display on the
instrument cluster. 5th gear has engine
braking available. -
6th Gear State
The 6th gear state will display on the
instrument cluster. 6th gear has engine
braking available. -
STD type
SVC type

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5. TRANSAXLE ELECTRONIC CONTROL SYSTEM
1) General Information
The transmission control unit (TCU) and its input/output network control the following transmission
operations:
Shift timing
Line pressure
Clutch pressure (shift feel)
Torque converter clutch -
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also uses these signals when determining transaxle operating strategy. Using all of these input signals,
the TCU can determine when the time and conditions are right for a shift, or when to apply or release the
torque converter clutch. It will also determine the pressure needed to optimise shift feel.
2) TCU (Transmission Control Unit)
The transaxle control unit (TCU) is mounted
under the driver's seat and controls the operation
of the transaxle.
Internal sensors and signals received across the
CAN bus in analogue and digital forms such as:
Transaxle input speed
Transaxle output speed
Accelerator pedal position
Gear selector position
Engine torque
Engine speed
Transaxle fluid temperature
Brake pedal status
Engine oil temperature
Engine coolant temperature
Ambient air temperature
Barometric pressure -
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The TCU monitors all TCU inputs and outputs to confirm correct system operation. If a fault occurs the
TCU is able to perform default action and inform the driver of the problem through the instrument cluster
warning lights. Detailed information is available via trouble codes which can be read with the service tool.

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7. POWER TRANSFER
Power transfer modes are as follow:
Manual: 1st gear (position M)
Drive: 1st gear
Drive: 2nd gear
Drive: 3rd gear
Drive: 4th gear - limp home mode
Drive: 5th gear
Drive: 6th gear -
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1) Overview
Name Component
C1 OVER DRIVE CLUTCH
C2 35R CLUTCH
B1 LOW & REVERSE BRAKE
B2 2/6 BRAKE
B3 UNDER DRIVE BRAKE
1F 1-2 ONE WAY CLUTCH
GEARCLUTCH BRAKE
OWC Gear Ratio
OD 35R 26 LR UD
1ST
O O 4.212
2ND O O 2.637
3RD O O 1.800
4TH O O 1.386
5TH O O 1.000
6TH O O 0.772
REV O O 3.385
N.P O
(1) Gear Selection and Engagement Element
Operation when vehicle speed under 5kph *

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(2) Reverse (3.385)
Middle planetary gear locked, middle sun gear rotated
When the sun gear rotates with the planetary gear locked in middle planetary gear set, the annulus
gear (front planetary gear) rotates in reverse direction with decreased speed and the power flows
through the front planetary gear.
The rear planetary gear set reduces the rotating speed of rear & front annulus gears and the front
planetary gear set rotates the front sun gear in reverse direction without load. -
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Power flow
Description 35R C OD C 26 B UD B LR B O.W.C
R