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1. Check the inner and outer circumference, tooth face, and side- face of the inner and outer gears for INFINITI QX56 2009 Factory Service Manual
TRANSFER ASSEMBLYDLN-161
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1. Check the inner and outer circumference, tooth face, and side- face of the inner and outer gears for](/manual-img/42/57031/w960_57031-1216.png)
TRANSFER ASSEMBLYDLN-161
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1. Check the inner and outer circumference, tooth face, and side- face of the inner and outer gears for damage or abnormal wear.
2. Measure the side clearance between the main oil pump housing edge and the inner and outer gears.
3. Make sure the side clearance is within specification. If the mea- surement is out of specificat ion, replace the inner and outer
gears with new ones as a set. Refer to DLN-142, "Disassembly
and Assembly".
Sub-oil Pump
1. Check the inner and outer circumference, tooth face, and side-
face of the inner and outer gears for damage or abnormal wear.
2. Measure the side clearance between the sub oil pump housing edge and the inner and outer gears.
3. Make sure the side clearance is within specification. If the mea- surement is out of specificat ion, replace the inner and outer
gears with new ones as a set. Refer to DLN-179, "Inspection
and Adjustment".
Control Valve
Check resistance between the terminals of the clutch pressure
solenoid valve, 2-4WD shift solenoid valve, clutch pressure switch,
line pressure switch and the transfer fluid temperature sensor.
Refer to TM-26, "Control Valve"
(clutch pressure solenoid valve),
TM-26, "Control Valve"
(2-4WD solenoid valve), TM-26, "Control
Va l v e " (clutch pressure switch), TM-26, "Control Valve" (line pres-
sure switch) and TM-26, "Control Valve"
(transfer fluid temperature
sensor).
Check the sliding faces of the control valves and plugs for abnor- mality. If any is found, replace t he control valve assembly with a
new one. Refer to DLN-142, "Disassembly and Assembly"
.
CAUTION:
Replace control valve body together with clutch return spring
as a set. Specification : Refer to
DLN-179, "Inspection and
Adjustment"SDIA2174E
Specification : Refer to DLN-179, "Inspection and Ad-
justment"SDIA2173E
WDIA0199E
SMT947C
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DLN-162
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TRANSFER ASSEMBLY
Check each control valve spring for damage or distortion. Also
check its free length, outer diamet er and wire diameter. If any dam-
a INFINITI QX56 2009 Factory Service Manual
DLN-162
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TRANSFER ASSEMBLY
Check each control valve spring for damage or distortion. Also
check its free length, outer diamet er and wire diameter. If any dam-
a](/manual-img/42/57031/w960_57031-1217.png)
DLN-162
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
Check each control valve spring for damage or distortion. Also
check its free length, outer diamet er and wire diameter. If any dam-
age or fatigue is found, replace the control valve body with a new
one. Refer to DLN-142, "Disassembly and Assembly"
.
CAUTION:
Replace control valve body togeth er with clutch return spring
as a set.
Clutch
Check the drive plate facings and driven plate for damage, cracks or other abnormality. If any abnormalities are found, replace with a
new one.
Check the thickness of the drive plate facings and driven plate.
Refer to DLN-179, "Inspection and Adjustment"
.
CAUTION:
Measure facing thickness at 3 points to take an average.
Check all drive an d driven plates.
Check return spring for damage or deformation.
Do not remove spring from plate.
Return Spring
Check the stamped mark shown. T hen, check that the free lengths,
(include thickness of plate) are within specifications. If any abnor-
mality is found, replace with a new return spring assembly of the
same stamped number. Refer to DLN-179, "Inspection and Adjust-
ment".
ASSEMBLY
Control Valve Assembly
1. Assemble the control valve assembly with the following procedure.
CAUTION:
Do not reuse any part that has been dropped or damaged.
Make sure valve is assembled in the proper direction.
Do not use a magnet because residual magnetism stays during assembly.
a. Clean the upper body (5), control valves (3) and springs (4) with cleaning agent, and dry with compressed air.
b. Dip the control valves in ATF, and apply ATF to the valve-mount- ing area of the upper body.
SMT948C
SMT949C
SDIA2176E
WDIA0284E
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TRANSFER ASSEMBLYDLN-163
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c. Install each control valve (3), springs (4), and plugs (2) to the upper body (5), and install retain INFINITI QX56 2009 Factory Service Manual
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c. Install each control valve (3), springs (4), and plugs (2) to the upper body (5), and install retain](/manual-img/42/57031/w960_57031-1218.png)
TRANSFER ASSEMBLYDLN-163
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c. Install each control valve (3), springs (4), and plugs (2) to the upper body (5), and install retainer plates (1) to hold them in
place.
CAUTION:
To insert control valves into upper body, place upper
body on a level surface in order to prevent flaw or dam-
age.
Make sure each control valve is smoothly inserted.
d. Install the reverse balls, relief balls and relief springs, accumula- tor pistons and valve springs to the upper body.
e. Install the lower body and separator plate to the upper body. CAUTION:
Do not reuse separator plates.
f. With the lower body down, tighten the two bolts shown.
g. Apply ATF to the new O-rings, and install them to each solenoid valve, switch and terminal body.
CAUTION:
Do not reuse O-rings.
h. Install the following to the control valve assembly: Clutch pressure solenoid valve
Clutch pressure switch
2-4WD shift solenoid valve
Line pressure switch
Transfer fluid temperature sensor
Center Case
SDIA2127E
SDIA2126E
WDIA0200E
WDIA0198E
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DLN-164
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1. Apply ATF to the new O-ring, and
install it on the oil filter stud.
CAUTION:
Do not reuse O-rings.
2. Install the oil filter stud t INFINITI QX56 2009 Factory Service Manual
DLN-164
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TRANSFER ASSEMBLY
1. Apply ATF to the new O-ring, and
install it on the oil filter stud.
CAUTION:
Do not reuse O-rings.
2. Install the oil filter stud t](/manual-img/42/57031/w960_57031-1219.png)
DLN-164
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TRANSFER ASSEMBLY
1. Apply ATF to the new O-ring, and
install it on the oil filter stud.
CAUTION:
Do not reuse O-rings.
2. Install the oil filter stud to the oil filter.
3. Apply ATF to the two new O-rings (1), and install them on the oil filter (2).
CAUTION:
Do not reuse O-rings.
4. Install the oil filter to the center case. Tighten the bolts to the specified torque. Refer to DLN-142, "Disassembly and Assem-
bly".
CAUTION:
Do not damage oil filter.
Attach oil filter an d tighten bolts evenly.
5. Install the outer gear and inner gear into the sub oil pump hous- ing, and measure the side clearance. Refer to DLN-142, "Disas-
sembly and Assembly".
6. Align the dowel pin hole and bolt hole of the sub oil pump assembly with the center case. Install the sub oil pump cover.
Then tighten to the specified torque. Refer to DLN-142, "Disas-
sembly and Assembly"
SDIA3180E
WDIA0285E
SDIA2136E
SDIA2135E
SDIA2328E
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TRANSFER ASSEMBLYDLN-165
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7. Apply ATF to the new O-ring and install it to the transfer motor. CAUTION:
Do not reuse O-rings.
8. INFINITI QX56 2009 Factory Service Manual
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7. Apply ATF to the new O-ring and install it to the transfer motor. CAUTION:
Do not reuse O-rings.
8.](/manual-img/42/57031/w960_57031-1220.png)
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7. Apply ATF to the new O-ring and install it to the transfer motor. CAUTION:
Do not reuse O-rings.
8. Fit the double-flat end of the transfer motor shaft into the slot of the sub-oil pump assembly. Then tighten to the specified torque.
Refer to DLN-142, "Disassembly and Assembly"
CAUTION:
Be sure to install connector bracket.
9. Apply ATF to the new lip seals, and install them to the center case.
CAUTION:
Do not reuse lip seals.
There are 2 kinds of lip seals (lip seal of large inner diam-
eter: 5 pieces, lip seal of small inner diameter: 2 pieces).
Confirm their position for installation.
10. Install the control valve assembly to the center case, and tighten to the specified torque. Refer to DLN-142, "Disassembly and
Assembly".
CAUTION:
Do not reuse any part that has been dropped or damaged.
Make sure valve is assembled in the proper direction.
Do not use a magnet becau se residual magnetism stays
during assembly.
11. Install the connector assembly into the center case, and secure with a snap ring.
12. Apply ATF to the new O-rings, and install them on the oil strainer.
CAUTION:
Do not reuse O-rings.
13. Install the oil strainer to the control valve assembly.
SDIA2787E
SDIA2123E
SDIA2121E
SDIA2122E
SDIA2782E
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DLN-166
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14. Tighten the bolts to the specified torque. Refer to
DLN-142, "Dis-
assembly and Assembly".
15. Apply ATF to the new D-rings, and in INFINITI QX56 2009 Factory Service Manual
DLN-166
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TRANSFER ASSEMBLY
14. Tighten the bolts to the specified torque. Refer to
DLN-142, "Dis-
assembly and Assembly".
15. Apply ATF to the new D-rings, and in](/manual-img/42/57031/w960_57031-1221.png)
DLN-166
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TRANSFER ASSEMBLY
14. Tighten the bolts to the specified torque. Refer to
DLN-142, "Dis-
assembly and Assembly".
15. Apply ATF to the new D-rings, and install them to the clutch pis- ton.
CAUTION:
Do not reuse D-rings.
16. Install the thrust needle bearing race to the clutch piston.
17. Install the clutch piston to the center case as shown. CAUTION:
Install so the fitting protrusion of clutch piston aligns with
the dent of center case.
18. Remove all the sealant from the oil pressure check port and inside the center case.
CAUTION:
Remove old sealant adhering to mating surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mating surfaces.
19. Thread the new oil pressure check plug in 1 or 2 pitches and apply sealant to the oil pressu re check plug threads. Tighten to
the specified torque. Refer to DLN-142, "Disassembly and
Assembly".
SDIA2119E
SDIA2781E
SDIA2189E
SDIA2190E
SDIA3188E
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Use Genuine Silicone RTV or equivalent. Refer to GI-15, "Recommended Chemical Products and
Sealants".
CAUTION:
Do not reuse oil pressure check plug.
20. Install the new snap ring to the clutch hub using suitable tool. CAUTION:
Do not reuse snap ring.
21. Apply petroleum jelly to the needle bearing, and install the nee- dle bearing, spacer, clutch drum and clutch hub to the main-
shaft.
22. Install the new snap ring to the mainshaft. CAUTION:
Do not reuse snap rings.
23. Apply ATF each plate, then install them into the clutch drum as shown.
WDIA0101E
WDIA0129E
SDIA2192E
SDIA2193E
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DLN-168
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24. Install the return spring assembly into the clutch hub.
25. Install the press flange by aligning the notches to the clutch hub
as shown.
26. Press the press flange to install the new snap ring into snap ring groove on mainshaft using Tools.
CAUTION:
Do not reuse snap ring.
27. Install the new snap ring to the mainshaft using suitable tool. CAUTION:
Do not reuse snap ring.
28. Apply ATF to the thrust needle bearing and install it on the press flange.
SMT911C
SDIA2194E
Tool number A: ST22452000 (J-34335)
B: ST30911000 ( — )
C: KV31103300 ( — )
SDIA2111E
SDIA2112E
SDIA2109E
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