Page 1049 of 1839
FRONT AXLE
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Page 1050 of 1839
26-1
FRONT AXLE
CONTENTS
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 4.................
LUBRICANTS 4..............................
SEALANTS 5................................
SPECIAL TOOLS 5..........................
ON-VEHICLE SERVICE 10...................
Wheel Bearing Backlash Check 10..............
Front Axle Total Backlash Check 10.............
Front Axle Gear Oil Level Check 11.............
Differential Carrier Oil Seal Replacement 11......
Solenoid Valve Operation Check 12..............
FRONT HUB AND KNUCKLE ASSEMBLY 13.
DRIVE SHAFT 16...........................
INNER SHAFT, HOUSING TUBE 24..........
FREEWHEEL CLUTCH ASSEMBLY,
DIFFERENTIAL CARRIER 28.................
FREEWHEEL CLUTCH ASSEMBLY 31.......
DIFFERENTIAL CARRIER 34.................
SOLENOID VALVE, VACUUMPIPE, VACUUM
TANK 49....................................
FRONT DIFFERENTIAL MOUNT 51..........
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Page 1051 of 1839

FRONT AXLE -General Information26-2
GENERAL INFORMATION
The front axle consists of the front hubs, knuckles,
drive shaft, wheel bearings, ball joints, front
differential, and freewheel clutch.
The features are:
DThe structural method of press fitting unit
bearing into the front hub is applied.
DThe wheel bearing uses a taper roller unit
bearing. For vehicles with ABS, a rotor for
detecting the wheel speed is press-fitted to
the U.J. outer wheel.
DDrive shafts incorporate U.J.-B.J.-type constant
velocity ball joint has high power transmission
efficiency and reduces vibration and noise.NOTE
U.J. is an abbreviation of Under cut Joint.
DA vacuum-type freewheel clutch has been
adopted in the freewheel mechanism. Its
solenoid valve and actuator switch powertrain
between 2WD and 4WD.
DThe differential support method is a four-point
elastic support method which reduces vibration
and noise.
ItemSpecification
WheelWheel bearing typeTaper roller type unit bearing
bearingsBearing (outside diameter´inside diameter)
mm88´50
DriveJoint typeOutsideU.J.
shaftInsideD.O.J.
Shaft length
*1´Shaft diam-Right353´28
*2,361.5´26*3
eter mmLeft323´28
*2,330´26*3
InnerShaft length´Shaft diameter mm389.2´31.5
shaftBearing (outside diameter´inside diameter)
mm62´35
NOTE
*1:The shaft length indicates the length between the center points of each joint.
*2:4M41-M/T
*3:4D56, 4M41-A/T, 6G74 GDI
FRONT DIFFERENTIAL
ItemSpecification
Reduction gear typeHypoid gear
Reduction ratio4.900
*1, 3.917*2, 4.100*3, 4.300*4
Differential gear typeStraight bevel gear
NumberDrive gear49
*1,47*2, 41*3, 43*4
of teeth
Drive pinion10
*1,*3,*4, 12*2
Side gear14
Pinion gear10
NOTE
*1:4D56
*2:4M41-A/T
*3:4M41-M/T
*4:6G74 GDI
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Page 1052 of 1839
S
id e 8
0.0 ´ 45.2 d
ia m ete r) m m F
ro nt 6
8.3 ´30.2 R
ear 7
2.2 ´ 36.5
Page 1053 of 1839

FRONT AXLE -Service Specifications/Lubricants26-4
SERVICE SPECIFICATIONS
ItemStandard valueLimit
Wheel bearing axis backlash mm-0
Front axle total backlash mm-11
Solenoid valve resistanceW36 - 46-
Hub rotation starting torque N×m-1.75
Setting of D.O.J. boot length mm80±5-
Opening dimension of the spe-
cial tool (MB991561) mmWhen the B.J. boot band
(small) is crimped.2.9-
When the B.J. boot band
(big) is crimped.3.2-
Crimped width of the B.J. boot band mm2.4 - 2.8-
Crimped height of B. J. boot band (big) mm-9.5
Final drive gear backlash mm0.11 - 0.16-
Drive gear runout mm-0.05
Differential gear backlash mm0 - 0.0760.2
Drive pinion turning torque N×mWithout oil seal0.83 - 1.19-
With oil sealCompanion flange (oil seal contact
surface) with anti-rust oil
0.93 - 1.128-
Companion flange (oil seal contact
surface) with gear oil
0.97 - 1.32-
LUBRICANTS
ItemsSpecified lubricantsQuantity
Front differential gear oilHypoid gear oil API classification GL-5 or higher, SAE
viscosity No. 90, 80W1.2 L
D.O.J. boot greaseRepair kit grease4M41-M/T:135±10 g
4M41-A/T, 6G7:
100±10 g
U.J.boot greaseRepair kit grease4M41-M/T:180±10 g
4M41-A/T, 6G7:
135±10 g
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Page 1054 of 1839
S
EA LA NTS
I te m s S
pecif ie d se ala nts R
em ark s C
onta ct su rfa ce of dif f e re ntia l co ve r and
d if f e re ntia lca rrie r 3
M AT D Part N o. 8661 or equiv a le nt S
em i- d ry in g se ala nt V
entplu g F
re ew heelclu tc h asse m bly D
riv e gear th re aded hole 3
M Stu d Lockin g 4170 or equiv a le nt A
naero bic se ala nt N
um ber N
am e U
se M
B990925 B
earin g and oil
s e alin sta lle r se t M
B990955 O
il se alin sta lle r M
B99111 3 or
M B990635 S
te erin g lin ka ge
p ulle r M
B990767 F
ro nt hub & fla nge
y o ke hold er H
ub fix ia tio n M
B990998 F
ro nt hub re m ove r
& in sta lle r I
n sp ectio n of hub ro ta tio n sta rtin g to rq ue M
B991561 B
oot band clip pin g
t o ol R
esin bootb and in sta lla tio n M
B990906 D
riv e sh aft atta ch -
m ent R
em ova land in sta lla tio n of in ner sh aft (U se d
t o geth er w it h M B990211 )
Page 1055 of 1839
R
ear axle sh aft oil
s e alre m ove r
A :A dapte r
B :S lid in g ham mer M
B990560 B
earin g re m ove r M
B990909 W
ork in g base S
upport of fr o nt dif f e re ntia lca rrie r asse m bly M
B99111 6 A
dapte r S
upport of fr o nt dif f e re ntia lca rrie r asse m bly M
B990810 S
id e bearin g pulle r M
B990811 D
if f e re ntia l sid e
b earin g ca p M
B990850 E
nd yo ke hold er R
em ova la nd in sta lla tio n of co m panio n fla nge M
B990339 B
earin g pulle r R
em ova lo fd riv e pin io n fr o ntb earin g in nerra ce M
B990648 B
earin g re m ove r
Page 1056 of 1839
P
in io n heig htg auge
s e t
A : Driv e pin io n
g auge asse m bly
B : Cylin der gauge M
B990685 T
o rq ue wre nch M
B990326 P
re lo ad so cke t M
B990802 B
earin g in sta lle r M
B990031
o r
M B990699 D
riv e pin io n oil s e al
i n sta lle r P
re ss-fit tin g of driv e pin io n oil se al M
B990813 T
a p R
em ova lo f adhesiv e M
B990799 B
all jo in t re m ove r
a nd in sta lle r I
n sta lla tio n of fr e ew heelclu tc h bearin g M
B9911 68 D
if f e re ntia l oil se al
i n sta lle r I
n sta lla tio n of fr e ew heelclu tc h oil se al