Mitsubishi Outlander (2013+). Manual — part 52

DIFFERENTIAL

REAR AXLE

27-3

• Lead-free grease for the constant velocity joint

has been adopted.

• Hexavalent chromium has been eliminated from

the dust cover material.

• The number of parts has been reduced by inte-

grating the magnetic encoder for ABS wheel
speed detection into the wheel bearing.

EUJ (High Efficiency Compact Undercut Joint):The

lighter and smaller constant velocity joint com-
pared with the conventional UJ has been
achieved by adopting the eight small balls.

ETJ (High Efficiency Compact Tripod Joint):The

lighter and smaller constant velocity joint com-
pared with the conventional TJ has been
installed.

SPECIFICATIONS

NOTE: *: Indicates the distance between the centre of each joint.

CONSTRUCTION DIAGRAM

DIFFERENTIAL

M2270001000786

With the introduction of the electronic control 4WD,
the electronic control coupling has been installed in
front of the differential.

Item

Specification

Wheel bearing

Bearing type

Unit ball bearing (double-row angular
contact ball bearing)

Driveshaft

Joint type

Outer

EUJ

Inner

ETJ

Shaft length*

× Shaft diameter mm

LH

496.0

× 24

RH

576.4

× 24

ACB05765

Differential carrier

Driveshaft

Rear hub

Rear hub

Oil seal

Ball bearing

AB

Electronic control coupling

Magnetic
encoder

DIFFERENTIAL

REAR AXLE

27-4

The electronic control coupling transfers the drive
force to the rear wheels by pushing the clutch in
according to the strength of the magnetic attraction
generated by the magnetic coil (For more details,
refer to Electronic Control 4WD

P.27-5

).

The following features are also available.

• Aluminium differential carrier has been adopted

for weight saving.

• Optimization of the hypoid gear ratio reduces the

torque loss.

• Adoption of the hypoid gear with the same teeth

height realizes the downsizing and increases the
strength of the coupling.

SPECIFICATIONS

Item

Specification

Reduction gear type

Hypoid gear

Reduction ratio

2.352

Differential gear type
(Type

× Quantity)

Side gear

Straight bevel gear

× 2

Pinion gear

Straight bevel gear

× 2

Number of teeth

Drive gear

40

Drive pinion

17

Side gear

14

Pinion gear

10

Gear oil

Hypoid gear oil API classification GL-5,
SAE 80W

Approx. 0.4 L

ACB05766AB

Hypoid gear

Differential carrier

Electronic control coupling

Equal altitude
toothed gear

Bevel gear

ACB05767AB

Electronic control coupling

Differential

Electromagnet

Clutch

ELECTRONICALLY CONTROLLED 4WD

REAR AXLE

27-5

DIFFERENTIAL MOUNT

The front side of the differential carrier is installed to
the rear suspension crossmember via rear differen-
tial mount front bracket (LH/RH). The rear side of the
differential carrier is installed to the rear suspension
crossmember via rear differential mount insulator. In
this way, the adoption of the three-point support type
differential mount and the optimization of the layout
reduce the vibration and noise.

ELECTRONICALLY CONTROLLED 4WD

GENERAL INFORMATION

M2270000101125

• Electronically controlled 4WD has been adopted

to ensure the on-road performance, achieve
lighter and smaller body, and realize better fuel
economy.

• The electronically controlled 4WD controls the

torque of the electronic control coupling located
between the propeller shaft and rear differential.
This strategy is enabled by varying the torque
distribution to the front and rear wheels from the
status closer to the front wheel drive to the status
closer to the direct coupling 4WD and realizes the
optimal drive force according to the various driv-
ing conditions.

ACB05770

Rear suspension
crossmember

Upper stopper

Differential carrier

Electronic control coupling

AB

Rear differential mount
front bracket (LH)

Rear differential
mount insulator

Lower stopper

Weight

Rear differential mount
front bracket (RH)

Weight

Lower
stopper

Upper stopper

ELECTRONICALLY CONTROLLED 4WD

REAR AXLE

27-6

AIMS OF DEVELOPMENT

Lightweight and simple construction of the electroni-
cally controlled 4WD achieves good fuel efficiency
and provides enjoyment of selecting the drive mode.

FUNCTION

• The adoption of the electronic control coupling

prevents the tight corner braking phenomenon

*

and satisfies the traction performance.

NOTE:

*

Tight corner braking indicates the following

condition. When the 4WD vehicle turns sharply
on a pavement at low speed (ex. parallel park-
ing), the rotational radius of the front and rear
wheels differs, and this difference can no longer
be compensated by the tyre slippage. At this
time, the driver feels as if the brake was applied.

• The electronically controlled 4WD receives the

signals of the throttle position and vehicle speed

via CAN

*

communication protocol, detects the

vehicle driving condition and operation of the
driver, and distributes the proper torque to the
rear wheels.

NOTE:

*

: For more information about CAN (Control-

ler Area Network), refer to GROUP 54C .

• Under severe driving condition, the system is pro-

tected by minimizing the limitation force of the dif-
ferential.

• During high-speed driving, the fuel efficiency is

improved by reducing the limitation force of the
differential.

• The following drive modes are available accord-

ing to the drivers' preference to provide the enjoy-
ment of selecting functions.

Drive
mode

Control content

Appeal point

4WD
ECO

Minimizes the
limitation force of
the differential.

High fuel efficiency
mode. This mode is
ordinary driven on
efficient 2WD and
provides 4WD
performance on
wheel slipping
conditions.

4WD
AUTO

Increases the
limitation force of
the differential
according to the
different rotation
speed of the front
and rear wheels
and the throttle
position.

Normal mode. This
mode achieves
adequate 4WD
performance on
various conditions,
dried pavement, wet
road, snow road, etc.

4WD
LOCK

Further increases
the limitation force
of the differential
compared to the
4WD AUTO.

High traction mode.
This mode excels at
rough road driving
and escape from
stuck conditions, in
addition, realizes
strong 4WD driving
from low speed to
high speed on
ordinary road.