INFINITI QX56 2004 Factory Service Manual

TF-126
FRONT CASE
Revision: August 20072004 QX56
2. Remove shift rod components together with 2-4 sleeve and L-H
sleeve.
3. Remove the shift cross from the front case.
4. Remove 2-4 sleeve and L-H sleeve from 2-4 fork and L-H fork
respectively.
5. Drive out retaining pin from shift rod, using suitable pin punch.
6. Remove L-H fork, 2-4 fork, shift fork spring and fork guide from
shift rod.
SDIA2140E
SMT992C
SDIA2141E
SDIA2142E

FRONT CASE
TF-127
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
PLANETARY CARRIER, SUN GEAR AND INTERNAL GEAR
1. Remove oil seal from the front case, using suitable tool.
CAUTION:
Be careful not to damage the front case and sun gear.
2. Remove the snap ring from the sun gear.
3. Remove the sun gear assembly from the front case, using Tool.
4. Remove snap ring from the planetary carrier assembly, using
suitable tool.
SDIA2143E
SDIA2144E
Tool number : ST35300000 ( — )
SDIA2145E
SDIA2146E

TF-128
FRONT CASE
Revision: August 20072004 QX56
5. Remove the sun gear assembly from the planetary carrier
assembly.
6. Remove the snap ring from the sun gear assembly, using suit-
able tool.
NOTE:
Do not reuse snap ring.
7. Remove the carrier bearing from the sun gear, using Tool.
8. Remove the needle bearing from the sun gear, using Tool.
SDIA2147E
SDIA2148E
Tool number
A : ST35300000 ( — )
B : ST30021000 ( — )
SDIA2149E
Tool number : ST33710000 ( — )
SDIA2354E

FRONT CASE
TF-129
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
9. Remove the metal bushing from the sun gear, using suitable
Tool.
10. Remove snap ring, and remove internal gear.
11. Remove front oil seal, using suitable tool.
CAUTION:
Be careful not to damage the front case.
12. Remove snap ring from the front case.
NOTE:
Do not reuse snap ring.To o l n u m b e r
A : ST33710000 ( — )
B : ST35325000 ( — )
C : ST33290001 (J-34286)
SDIA2168E
SDIA2169E
SMT004D
SDIA2170E
SDIA2171E

TF-130
FRONT CASE
Revision: August 20072004 QX56
13. Remove the mainshaft front bearing from the front case, using
Tool.
Tool number : ST33200000 (J-26082)
SDIA2178E

FRONT CASE
TF-131
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
FRONT CASEPFP:33107
InspectionEDS00191
PLANETARY CARRIER

Measure end play of each pinion gear, and make sure the mea-
surement is within specification shown below. If out of specifica-
tion, replace planetary carrier assembly with new one.

Check working face of each gear, bearing and others for dam-
age, burrs, partial wear, dents and other abnormality. If any is
found, replace planetary carrier assembly with new one.
SUN GEAR

Check if oil passage of sun gear assembly is clogged. For this,
try to pass a 3.6 mm (0.142 in) dia. wire through oil passage as
shown.

Check sliding/contact surface of each gear, bearing and others
for damage, burrs, partial wear, dents, and other abnormality. If
any is found, replace sun gear assembly with new one.
INTERNAL GEAR

Check internal gear teeth for damage, partial wear, dents and
other abnormality. If any is found, replace internal gear with new
one.
SHIFT ROD COMPONENTS

Check working face of shift rod and fork for wear, partial wear,
bending and other abnormality. If any is found, replace with new
one.Pinion gear end play : 0.1 - 0.7 mm (0.004 - 0.028 in)
PDIA0185E
PDIA0186E
SMT008D
SMT009D

TF-132
FRONT CASE
Revision: August 20072004 QX56

Measure clearance between shift fork and sleeve. If it is out of
specification, replace it with new one.
Standard value : Less than 0.36 mm (0.0142 in)
SMT010D

CENTER CASE
TF-133
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
CENTER CASEPFP:33105
InspectionEDS00192
BEARINGS
1. Make sure bearings roll freely and are free from noise, pitting
and cracks.
SUB-OIL PUMP
1. Check inner and outer circumference, tooth face, and side-face
of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between sub oil pump housing edge
and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measure-
ment is out of specification, replace inner and outer gears
together with new ones as a set.
MAIN OIL PUMP
1. Check inner and outer circumference, tooth face, and side-face
of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between main oil pump housing edge
and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measure-
ment is out of specification, replace inner and outer gears with
new ones as a set.
MAINSHAFT

Check surfaces which contact sun gear, clutch drum, clutch hub,
press flange, clutch piston, each bearing, etc. for damage, peel,
partial wear, dents, bending, or other abnormal damage. If any is
found, replace with new one.
SDIA2175E
Specification : 0.015 - 0.035 mm (0.0006 - 0.0014 in)
SDIA2173E
Specification : 0.015 - 0.035 mm (0.0006 - 0.0014 in)
SDIA2174E
SMT944C

TF-134
CENTER CASE
Revision: August 20072004 QX56
CONTROL VALVE

Check resistance between terminals of 4WD solenoid valve, 2-
4WD shift solenoid valve and transfer fluid temperature sensor.
Refer to TF-95, "
Component Inspection" .

Check sliding faces of control valves and plugs for abnormality.
If any is found, replace the control valve assembly with new one.
Refer to TF-154, "
Control Valve" .
CAUTION:
Replace control valve body together with clutch return
spring as a set.

Check each control valve spring for damage or distortion, and
also check its free length, outer diameter and wire diameter. If
any damage or fatigue is found, replace control valve body with
new one. Refer to TF-154, "
Control Valve" .
CAUTION:
Replace control valve body together with clutch return spring
as a set.
CLUTCH

Check drive plate facings and driven plate for damage, cracks or
other abnormality. If any abnormalities are found, replace with
new one.

Check the thickness of drive plate facings and driven plate.
Refer to TF-153, "
CLUTCH" .
CAUTION:

Measure facing thickness at 3 points to take an average.

Check all the drive and driven plates.

Check return spring for damage or deformation.

Do not remove spring from the plate
PDIA0183E
SMT947C
SMT948C
SMT949C

CENTER CASE
TF-135
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56

Check stamped mark shown in the figure. Then, check that free
length, (include thickness of plate) are within specifications. If
any abnormality is found, replace with new return spring assem-
bly of the same stamped number.
NOTE:
Specifications, refer to TF-153, "
CLUTCH" .
SDIA2176E