SsangYong Korando III (2010 year). Service manual — part 530

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6. SPECIAL SERVICE TOLLS

Part number

Name

Tool

How to use

00104-001(UD)

Remover &
Installer - U/D
brake return sprin

00104-002(OD)

Remover&
Installer - O/D
clutch return
spring

00104-003(LR)
(use with 00104-001)

Remover&
Installer - L/R
brake return
spring

* Special service tool Supplier: Tool & Tech

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3660-01

1. OVERVIEW

2WD

4WD

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

-

-

-

-

-

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. FEATURES

1) Advantages

Early Downshift with Hard Braking and Skip Shifts

▶

When heavy braking is detected, the transaxle downshifts early and skips gears to provide increased

engine braking to provide gear selection for tip-in.

Gear Hold going Uphill/Downhill

▶

If the accelerator pedal is released when traveling uphill, upshifts are prevented to reduce busyness on

grades. If the accelerator pedal is released when traveling downhill, upshifts are prevented to enhance

engine braking.

Drive and Reverse Engagement

▶

A soft engagement feature avoids harsh take up of drive when selecting Drive or Reverse. This is

achieved by limiting engine speed and engine torque which results in a rapid, but progressive

engagement of either Drive or Reverse when moving from the Park or Neutral positions. Drive and

Reverse engagements from either Park or Neutral are performed in less than 2.2 seconds. There is no

drive engagement prevention strategy implemented on the transaxle system as there is sufficient engine

strategy to protect the system. However, reverse engagement is prevented until vehicle speed is less

than 7 km/h.

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3660-01

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.