Ins INFINITI QX56 2004 Factory Service Manual

AIR BREATHER HOSE
TF-105
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Revision: August 20072004 QX56
AIR BREATHER HOSEPFP:31098
Removal and InstallationEDS00319
Refer to the figure for air breather hose removal and installation information.
CAUTION:

Make sure there are no pinched or restricted areas on the air breather hose caused by bending or
winding when installing it.

Install the air breather hose into the air breather (metal connector) and actuator (case connector)
until the hose end reaches the base of the tube.

Install the air breather hose into the breather tube (metal connector) and transfer motor (case con-
nector) until the hose end reaches the end of the curved section.
SDIA2656E

TF-106
TRANSFER MOTOR
Revision: August 20072004 QX56
TRANSFER MOTORPFP:00000
Removal and InstallationEDS0018R
REMOVAL
1. Disconnect transfer motor harness connector.
2. Remove breather pipe from transfer motor.
3. Remove bolts to detach transfer motor.
NOTE:
After removing transfer motor, be sure to replace O-ring with
new one.
INSTALLATIONEDS0018S
1. Apply ATF or petroleum jelly to new O-ring.
NOTE:
Do not reuse O-ring.
2. Align width across flat-notch with oil pump groove, and install
transfer motor.
3. Tighten bolts.
4. Install breather pipe to transfer motor.
5. Connect transfer motor harness connector.
SDIA2133E
Transfer motor bolts : 45 N·m (4.6 kg-m, 33 ft-lb)
SDIA2185E

TRANSFER OIL FILTER
TF-107
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Revision: August 20072004 QX56
TRANSFER OIL FILTERPFP:00000
Removal and InstallationEDS0031A
REMOVAL
1. Remove the oil filter bolts and oil filter.
CAUTION:

Do not damage center case and oil filter.

Loosen bolts and detach oil filter evenly.
2. Remove the O-rings (1) from the oil filter (2).
3. Remove the oil filter stud from the oil filter.
4. Remove the O-ring from the oil filter stud.
INSTALLATION
1. Apply ATF to the O-ring, and install it on the oil filter stud.
CAUTION:
Do not reuse O-ring.
2. Install the oil filter stud to the oil filter.
SMT875C
WDIA0285E
SDIA2784E
SDIA2784E

TF-108
TRANSFER OIL FILTER
Revision: August 20072004 QX56
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 transfer assembly. Tighten the bolts to
the specified torque. Refer to TF-110, "
Transfer Components" .
CAUTION:

Do not damage oil filter.

Attach oil filter and tighten bolts evenly.
5. Check the transfer fluid. Refer to MA-24, "
Checking Transfer
Fluid" .
6. Start the engine for one minute. Then stop the engine and
recheck the transfer fluid.
WDIA0285E
SDIA2136E

REMOVAL AND INSTALLATION
TF-109
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Revision: August 20072004 QX56
REMOVAL AND INSTALLATIONPFP:00000
RemovalEDS0018V
1. Remove A/T undercover using power tools.
2. Remove center exhaust tube and muffler. Refer to EX-3, "
EXHAUST SYSTEM" .
3. Remove front and rear propeller shafts. Refer to PR-5, "
REMOVAL" (front) and PR-9, "REMOVAL"
(rear).
CAUTION:
Be careful not to damage spline, sleeve yoke and rear oil seal when removing the rear propeller
shaft
NOTE:
Insert a plug into rear oil seal after removing rear propeller shaft.
4. Remove A/T mount bolts. Refer to AT-255, "
TRANSMISSION ASSEMBLY" .
5. Position two suitable jacks under A/T and transfer assembly.
6. Remove crossmember. Refer to TF-109, "
REMOVAL AND INSTALLATION" .
WAR NIN G:
Support A/T and transfer assembly using two suitable jacks while removing crossmember.
7. Disconnect the ATP switch, neutral 4LO switch, wait detection switch, transfer motor and transfer control
device electrical connectors.
8. Remove breather hoses from the actuator, transfer rear case and transfer motor.
9. Remove the shift actuator from the extension housing.
10. Remove transfer to A/T bolts.
WAR NIN G:
Support transfer assembly with suitable jack while removing it.
11. Remove transfer assembly.
InstallationEDS0018W
1. Installation is in the reverse order of removal.
Bolt length : 45 mm (1.77 in)
Transfer bolt torque : 36 N·m (3.7 kg-m, 26 ft-lb)
SMT872C

TF-110
OVERHAUL
Revision: August 20072004 QX56
OVERHAULPFP:00000
Transfer ComponentsEDS0018X
1. 2-4 sleeve 2. L-H sleeve 3. Snap ring
4. Internal gear 5. Planetary carrier assembly 6. Metal bushing
7. Needle bearing 8. Sun gear 9. Carrier bearing
10. Snap ring 11. Snap ring 12. Mainshaft front bearing
13. Wait detection switch 14. Check plug 15. Check spring
16. Check ball 17. Front case 18. Snap ring
19. Oil seal 20. Shift cross 21. Oil seal
22. Lock pin 23. Shift lever 24. Washer
25. Drain plug 26. Oil seal 27. Companion flange
28. Self-lock nut 29. Main shaft 30. Needle bearing
31. Front bearing 32. Front drive shaft 33. Rear bearing
34. Spacer 35. Drive chain 36. Clutch drum
37. Snap ring 38. Clutch hub 39. Snap ring
40. Retaining plate 41. Driven plate (10 sheet) 42. Drive plate (10 sheet)
43. Return spring assembly 44. Press flange 45. Thrust needle bearing
SDIA2090E

OVERHAUL
TF-111
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Revision: August 20072004 QX56
46. Snap ring 47. Retaining pin 48. L-H fork
49. 2-4 fork 50. Shift fork spring 51. Fork guide
52. Retainer pin 53. Shift rod
1. Dust cover 2. Oil seal 3. Rear case
4. Air breather 5. Seal ring 6. Main oil pump cover
7. Inner gear 8. Outer gear 9. Main oil pump housing
10. D-ring 11. D-ring 12. Clutch piston
13. Thrust needle bearing race 14. Oil strainer 15. O-ring
16. Snap ring 17. Control valve assembly 18. Lip seal (7 pieces)
19. Washer 20. Filler plug 21. Filler stud
22. O-ring 23. Oil filter 24. ATP switch
25 Neutral-4LO switch 26. Oil pressure check plug 27. Harness bracket
28. Stem bleeder 29. Harness bracket 30. Center case
31. Mainshaft rear bearing 32. C-ring 33. Washer holder
34. Snap ring 35. Sub oil pump housing 36. Outer gear
37. Inner gear 38. Sub oil pump cover 39. O-ring
40. Transfer motor 41. Connector bracket
SDIA2091E

TF-114
CENTER CASE
Revision: August 20072004 QX56
5. Remove companion flange, using suitable tool.
6. Remove the center case bolts.
7. Remove harness bracket.
8. Remove filler plug and washer.
9. Separate center case from front case, using suitable tool, then
remove center case by prying it up.
CAUTION:
Be careful not to damage the mating surface.
10. Remove snap ring and washer holder from the mainshaft.
SDIA2099E
SDIA2100E
SDIA2101E
SDIA2104E

CENTER CASE
TF-115
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Revision: August 20072004 QX56
11. Remove C-rings from mainshaft bearing, using suitable tool.
FRONT DRIVE SHAFT AND DRIVE CHAIN
1. With front drive shaft held by one hand as shown, remove using
a suitable tool, remove front drive shaft with drive chain.
CAUTION:
Do not tap drive chain with a plastic hammer.
2. Remove the front drive shaft front bearing using Tool.
3. Remove the front drive shaft rear bearing using Tool.
SDIA2105E
SMT900C
To o l n u m b e r
A : ST33052000 ( — )
B : ST30031000 ( — )
SDIA2106E
To o l n u m b e r
A : ST33052000 ( — )
B : ST30031000 ( — )
SDIA2107E

TF-116
CENTER CASE
Revision: August 20072004 QX56
MAINSHAFT AND CLUTCH DRUM
1. Set center case on press stand. Remove mainshaft from center
case.
2. Remove thrust needle bearing from press flange.
3. Remove snap ring from mainshaft, using suitable tool.
4. Press flange as shown, using Tool. Press drift until snap ring is
out of place.
SDIA2108E
SDIA2109E
SDIA2 110 E
Tool number
A : ST22452000 (J-34335)
B : ST30911000 ( — )
C : KV31103300 ( — )
SD I A 2 111E