INFINITI QX56 2006 Factory Service Manual

TF-6
PREPARATION
Revision: November 20092006 QX56
PREPARATIONPFP:00002
Special Service ToolsEDS003B4
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
KV40104000
( — )
Flange wrench

Removing self-lock nut

Installing self-lock nut
a: 85 mm (3.35 in)
b: 65 mm (2.56 in)
KV381054S0
(J-34286)
Puller

Removing front oil seal

Removing rear oil seal

Removing metal bushing
KV38100500
( — )
Drift

Installing front oil seal
a: 80 mm (3.15 in) dia.
b: 60 mm (2.36 in) dia.
ST30720000
(J-25405)
Drift

Installing rear oil seal

Installing mainshaft front bearing and oil
seal
a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.185 in) dia.
KV40105310
( — )
Drift

Installing dust cover
a: 89 mm (3.50 in) dia.
b: 80.7 mm (3.17 in) dia.
ST22360002
(J-25679-01)
Drift

Installing side oil seal
a: 23 mm (0.91 in) dia.
b: 32 mm (1.26 in) dia.
ST35300000
( — )
Drift

Removing sun gear assembly and planetary
carrier assembly

Removing carrier bearing

Installing metal bushing
a: 59 mm (2.32 in) dia.
b: 45 mm (1.77 in) dia.
NT659
ZZA0601D
ZZA0811D
ZZA0811D
ZZA1003D
ZZA1091D
NT073

PREPARATIONTF-7
CE F
G H
I
J
K L
M A
B
TF
Revision: November 2009 2006 QX56
ST33200000
(J-26082)
Drift
Removing mainshaft front bearing

Installing sun gear assembly and planetary
carrier assembly

Installing mainshaft front bearing and oil
seal
a: 74.5 mm (2.933 in) dia.
b: 62.5 mm (2.461 in) dia.
ST30031000
( — )
Puller

Removing carrier bearing

Removing front drive shaft front bearing

Removing front drive shaft rear bearing
a: 90 mm (3.54 in) dia.
b: 50 mm (1.97 in) dia.
ST33710000
( — )
Drift

Removing needle bearing

Removing metal bushing
a: 24 mm (0.94 in) dia.
b: 89 mm (3.5 in)
c: 30 mm (1.18 in) dia.
ST35325000
( — )
Drift bar

Removing metal bushing
a: 215 mm (8.46 in)
b: 25 mm (0.98 in) dia.
c: M12 × 1.5P
ST33052000
( — )
Adapter

Removing front drive shaft front bearing

Removing front drive shaft rear bearing

Installing mainshaft
a: 28 mm (1.10 in) dia.
b: 22 mm (0.87 in) dia.
ST22452000
(J-34335)
Drift

Removing press flange snap ring

Installing press flange snap ring
a: 45 mm (1.77 in) dia.
b: 36 mm (1.42 in) dia.
c: 400 mm (15.76 in) dia.
ST30911000
( — )
Puller

Removing press flange snap ring

Installing press flange snap ring

Installing mainshaft

Installing carrier bearing
a: 98 mm (3.86 in) dia.
b: 40.5 mm (1.594 in) dia.
Tool number
(Kent-Moore No.)
Tool name
Description
NT661
NT411
ZZA1057D
NT663
NT431
NT117
NT664

TF-8
PREPARATION
Revision: November 20092006 QX56
KV31103300
(— )
Drift
Removing press flange snap ring

Installing press flange snap ring

Installing carrier bearing
a: 76.3 mm (3.004 in) dia.
b: 130 mm (5.12 in)
KV38100300
(J-25523)
Drift

Removing mainshaft rear bearing
a: 54 mm (2.13 in) dia.
b: 46 mm (1.81 in) dia.
c: 32 mm (1.26 in) dia.
ST15310000
(J-25640-B)
Drift

Installing mainshaft rear bearing
a: 96 mm (3.78 in) dia.
b: 84 mm (3.31 in) dia.
KV40100621
(J-25273)
Drift

Installing front drive shaft front bearing

Installing front drive shaft rear bearing
a: 76 mm (2.99 in) dia.
b: 69 mm (2.72 in) dia.
ST30032000
(J-26010-01)
Base

Installing front drive shaft front bearing

Installing front drive shaft rear bearing
a: 38 mm (1.50 in) dia.
b: 80 mm (3.15 in) dia.
ST33220000
( — )
Drift

Installing needle bearing
a: 37 mm (1.46 in) dia.
b: 31 mm (1.22 in) dia.
b: 22 mm (0.87 in) dia.
Tool number
(Kent-Moore No.)
Tool name
Description
NT668
ZZA1046D
ZZA0908D
NT086
NT660
ZZA1046D

PREPARATIONTF-9
CE F
G H
I
J
K L
M A
B
TF
Revision: November 2009 2006 QX56
Commercial Service ToolsEDS003B5
Tool nameDescription
Puller

Removing companion flange
Pin punch

Removing retainer pin

Installing retainer pin
a: 6 mm (0.24 in) dia.
Power tool

Removing transfer case assembly
NT077
NT410
PBIC0190E

TF-10
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: November 20092006 QX56
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS002I1
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion. If necessary, repair or replace these parts.
Reference page
TF-11TF-146TF-163TF-163TF-163
SUSPECTED PARTS
(Possible cause)
TRANSFER FLUID (Level low)
TRANSFER FLUID (Wrong)
TRANSFER FLUID (Level too high)
LIQUID GASKET (Damaged)
O-RING (Worn or damaged)
OIL SEAL (Worn or damaged)
SHIFT FORK (Worn or damaged)
GEAR (Worn or damaged)
BEARING (Worn or damaged)
SymptomNoise
1 2 3 3
Transfer fluid leakage 3 1 2 2 2
Hard to shift or will not shift 1 1 2

TRANSFER FLUIDTF-11
CE F
G H
I
J
K L
M A
B
TF
Revision: November 2009 2006 QX56
TRANSFER FLUIDPFP:31001
ReplacementEDS003B6
DRAINING
1. Stop the engine.
2. Remove the drain plug and gasket to drain the transfer fluid as
shown.
3. Install the new gasket on the drain plug and install the drain plug in the transfer. Tighten the drain plug to specification.
CAUTION:
Do not reuse the gasket.
FILLING
1. Remove the filler plug and gasket.
2. Fill with new specified fluid until the fluid level reaches the spec-ified limit near the filler plug hole as shown.
CAUTION:
Carefully fill the transfer with fluid. Filling should take
approximately three minutes.
3. Leave the vehicle for three minutes and then check the fluid level again as shown.
4. Install the new gasket on the filler plug and install the filler plug in the transfer. Tighten the filler plug to specification.
CAUTION:
Do not reuse the gasket.
InspectionEDS003B7
FLUID LEAKAGE AND FLUID LEVEL
1. Check for any fluid leaks from the transfer assembly or around it and correct as necessary.
2. Remove the filler plug to check the fluid level at the filler plug
hole as shown.
CAUTION:
Do not start the engine while checking the fluid level.
3. Install the new gasket on the filler plug and install the filler plug in the transfer. Tighten the filler plug to specification.
CAUTION:
Do not reuse the gasket.Drain plug : Refer to
TF-146, "
COMPONENTS" .
SDIA3208E
Fluid capacity and grade : Refer to MA-11, "Fluids
and Lubricants" .
Filler plug : Refer to TF-146, "
COMPONENTS" .
SDIA3209E
Filler plug : Refer to TF-146, "COMPONENTS" .
SDIA3209E

TF-12
ALL-MODE 4WD SYSTEM
Revision: November 20092006 QX56
ALL-MODE 4WD SYSTEMPFP:00000
Cross-section ViewEDS002H8
1. Center case2. Front case 3. Internal gear
4. Planetary carrier assembly 5. Sun gear assembly 6. Main shaft
7. L-H sleeve 8. L-H fork 9. Shift rod
10. 2-4 sleeve 11. 2-4 fork 12. Drive chain
13. Front drive shaft 14. Control valve assembly 15. Transfer motor
16. Rear case 17. Clutch piston 18. Press flange
19. Multiple disc clutch 20. Clutch hub assembly 21. Clutch drum assembly
WDIA0202E

ALL-MODE 4WD SYSTEMTF-13
CE F
G H
I
J
K L
M A
B
TF
Revision: November 2009 2006 QX56
Power TransferEDS002H9
POWER TRANSFER DIAGRAM
1. Center case2. Chain3. Multiple disc clutch
4. Rear case 5. Mainshaft6. Clutch hub assembly
7. Sub oil pump 8. Transfer motor9. Control valve
10. Front drive shaft 11. Drain plug12. 2-4 sleeve
13. Sun gear assembly 14. L-H sleeve15. Planetary carrier assembly
16. Internal gear 17. Front case
LDIA0053E

TF-14
ALL-MODE 4WD SYSTEM
Revision: November 20092006 QX56
POWER TRANSFER FLOW
SDIA3327E

ALL-MODE 4WD SYSTEMTF-15
CE F
G H
I
J
K L
M A
B
TF
Revision: November 2009 2006 QX56
System DescriptionEDS002HA
CONTROL SYSTEM
WDIA0162E