Mitsubishi Lancer Evolution 7. Manual — part 279
27B-1
REAR AXLE
CONTENTS
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Rear Axle Total Backlash Check
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Wheel Bearing Axial Play Check
Wheel Bearing Rotary-sliding Resistance Check
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Differential Carrier Oil Seal Replacement
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<VEHICLES WITH MECHANICAL LSD>
REAR AXLE -
General Information
27B-2
GENERAL INFORMATION
The rear axle consists of rear hubs, wheel bearings,
drive shafts, and rear differential and, it has the
following features.
D
The wheel bearing is a unit bearing (double-row
angular contact ball bearing).
D
The drive shaft incorporates B.J.-T.J. type
constant velocity joints with high transmission
efficiency and low vibration and noise.
D
ABS rotors for detecting the wheel speeds are
press-fitted to the B.J. outer wheels in vehicles
with ABS or ACD.
NOTE
1. B.J.: Birfield Joint
2. T.J.: Tripod Joint
SPECIFICATIONS
Item
Vehicles without AYC
Vehicles with AYC
Wheel
bearings
Wheel bearing type
Unit bearing (Double-row angular contact ball
bearing)
g
Bearing (outside diameter × inside diameter) mm
78 × 40
Drive
shaft
Joint type
Outside
B.J.
shaft
Inside
T.J.
Shaft length*
1
× Shaft diameter
mm
Left
483 × 25
426 × 25
mm
Right
573 × 25
446 × 25
NOTE
*
1
: The shaft length indicates the length between the center points of each joint.
STRUCTURAL DIAGRAM
Oil seal
Rear hub
Differential carrier
B.J.
Drive shaft
T.J.
REAR AXLE -
Service Specifications/Lubricants
27B-3
SERVICE SPECIFICATIONS
Item
Standard value
Limit
Rear axle total backlash mm
-
6
Wheel bearing rotation starting torque N·m
-
1.0
Wheel bearing axial play mm
-
0.05 or less
Wheel bearing rotary-sliding resistance N
-
22 or less
TJ boot assembly dimension mm
90 ± 3
-
Drive gear backlash mm
0.11 – 0.16
-
Drive gear runout mm
-
0.05
Drive pinion turning
torque N·m
Without oil seal
0.88 – 1.17
-
torque N·m
With oil seal
Companion flange (oil seal contact-
ing area) with anti-rust agent
0.98 – 1.27
-
Companion flange (oil seal contact-
ing area) with gear oil applied
0.49 – 0.58
-
Vehicles with mechani-
cal LSD
Right-to-left difference in combined thickness of friction
plate and friction disc
mm
0 – 0.05
-
Clearance between spring plate and differential case
mm
0.06 – 0.25
-
LSD
differential
torque
N·m
When new clutch plate is installed
5 – 19
-
torque
N·m
When existing clutch plate is
installed
2 – 19
-
Distortion of friction plate and friction disc
mm
-
0.08
Difference in thickness between friction plate, friction
disc, and spring plate
mm
-
0.1
Vehicles with ACD and
AYC
Pressure generated by hydraulic unit (pressure sensor
value
) MPa
0.9 – 1.1
-
LUBRICANTS
Item
Specified lubricants
Quantity
Vehicles with
mechanical
S
Gear oil
Hypoid gear oil
MITSUBISHI Genuine Gear Oil Part No. 8149630
0.55
L
LSD
MITSUBISHI Genuine Gear Oil Part No. 8149630
EX, CASTROL HYPOY LS (GL-5, SAE 90),
SHELL-LSD (GL-5, SAE 80W - 90) or equivalent
Vehicles with
ACD and
AYC
Gear oil
Differential
Hypoid gear oil
API classification GL-5 or higher SAE viscosity
No.90, 80W
0.55 ± 0.02
L
Torque transfer
mechanism
ATF-SPⅢ
0.65 - 0.7
L
REAR AXLE -
Lubricants/Sealants/Special tools
27B-4
Item
Quantity
Specified lubricants
Vehicles with
ACD and
Hydraulic piping fluid
ATF-SPⅢ
1 L
ACD and
AYC
Torque transfer mechanism oil
seal lips
Vaseline
As required
B.J. joint
Repair kit grease
85 ± 10 g
T.J. joint
Repair kit grease
105 ± 10 g
SEALANTS
Items
Specified sealants
Remarks
Vehicles with me-
chanical LSD
Vent plug
3M ATD Part No. 8661, 8663 or
equivalent
Semi-drying sealant
chanical LSD
Differential cover assembly
equivalent
Vehicles with ACD
and AYC
Vent plug
and AYC
Differential
carrier
cover
mounting part
Vehicles with me-
chanical LSD
Drive gear and differential
case mounting part
3M Stud Locking 4170 or equivalent
Anaerobic sealant
SPECIAL TOOLS
Tool
Number
Name
Use
MB991502
MUT-II sub as-
sembly
Inspection of AYC (diagnosis display by
MUT-II)
MB991529
Diagnosis
code
check harness
Inspection of AYC
(diagnosis display by ACD mode indicator
lamp)
MD998330
(MD998331)
Oil pressure gauge
Hydraulic pressure measurement <vehicles
with AYC>
MB991705
Hose adapter
MB990925
Bearing and oil
seal installer set
Removal of wheel bearing
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