2008 INFINITI QX56 differential

DIFFERENTIAL GEAR OILDLN-207
< ON-VEHICLE MAINTENANCE > [FRONT FINAL DRIVE: M205]
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ON-VEHICLE MAINTENANCE
DIFFERENTIAL GEAR OIL
Changing Differential Gear OilINFOID:0000000001604443
DRAINING
1. Stop the engine.
2. Remove the drain plug from the front final drive assembly to drain the differential gear oil.
3. Install the drain plug with sealant applied on the thr eads to the front final drive assembly. Tighten to the
specified torque. Refer to DLN-214, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Prod-
ucts and Sealants".
FILLING
1. Remove the filler plug from the front final drive assembly.
2. Fill the front final drive assembly with new differential gear oil
until the level reaches the specified level near the filler plug hole.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to DLN-214, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants".
Checking Differential Gear OilINFOID:0000000001604444
DIFFERENTIAL GEAR OIL LEAKAGE AND LEVEL
1. Make sure that differential gear oil is not leaking from the front final drive assembly or around it.
2. Check the differential gear oil level from the filler plug hole as
shown.
CAUTION:
Do not start engine while checki ng differential gear oil level.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to DLN-214, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants".
Differential gear oil
grade and capacity
: Refer to
MA-12, "
Fluids
and Lubricants".
LDIA0176E
LDIA0176E
Revision: March 2010 2008 QX56

DLN-208
< ON-VEHICLE REPAIR >[FRONT FINAL DRIVE: M205]
SIDE OIL SEAL
ON-VEHICLE REPAIR
SIDE OIL SEAL
Removal and InstallationINFOID:0000000001604445
REMOVAL
1. Remove the front final drive assembly. Refer to
DLN-212, "Removal and Installation".
2. Remove the differential side shaft and differential side flange using suitable tool.
3. Place a small hole in the side oil seal case using suitable tool.
4. Remove the side oil seal using suitable tool as shown.
INSTALLATION
1. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly to
the gear carrier using suitable tool.
CAUTION:
• Do not reuse side oil seal.
• Do not incline the new side oil seal when installing.
• Apply multi-purpose grease to the lips of the new side oil seal.
2. Installation of the remaining components is in the reverse order of removal. CAUTION:
Check the differential gear oil level after installation. Refer to DLN-207, "
Checking Differential Gear
Oil".
BDIA0006E
LDIA0129E
LDIA0130E
Revision: March 2010 2008 QX56

DLN-210
< ON-VEHICLE REPAIR >[FRONT FINAL DRIVE: M205]
FRONT OIL SEAL
INSTALLATION
1. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly to the gear carrier
using Tool.
CAUTION:
• Do not reuse front oil seal.
• Do not incline the new front oil seal when installing.
• Apply multi-purpose grease to the lips of the new front oil
seal.
2. Install the companion flange to the drive pinion while aligning the matching marks.
3. Apply anti-corrosive oil to the threads of the drive pinion and the seating surface of the new drive pinion lock nut. Then adjust the
drive pinion lock nut tightening torque using Tool (A), and check
the total preload torque using Tool (B).
• The total preload torque should be within the total preloadtorque specification. When not replacing the collapsible
spacer, it should also be equal to the measurement taken dur-
ing removal plus an additional 0.56 N·m (0.06 Kg-m, 5 in-lb).
• If the total preload torque is low, tighten the drive pinion lock
nut in 6.8 N·m (0.69 Kg-m, 5 ft-lb) increments until the total
preload torque is met.
CAUTION:
• Do not reuse drive pinion lock nut.
• Apply anti-corrosive oil to the threads of the drive pinion and the seating surface of the new drive pinion lock nut.
• Adjust the drive pinion lock nut tightening torque to the lower limit first. Do not exceed the drive pinion lock nut
specified torque. Refer to DLN-214, "
Disassembly and Assembly".
• Do not loosen drive pinion lock nu t to adjust the total preload torque. If the drive pinion lock nut
torque or the total preload torque exceeds the sp ecifications, replace the collapsible spacer and
tighten it again to adjust. Refer to DLN-214, "
Disassembly and Assembly".
• After adjustment, rotate drive pinion back and fo rth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
4. Installation of the remaining components is in the reverse order of removal. CAUTION:
Check the differential gear oil level after installation. Refer to DLN-207, "
Checking Differential Gear
Oil".
Tool number : KV38100500 (J-25273)
BDIA0003E
Tool number A: KV38108300 (J-44195)
B: ST3127S000 (J-25765-A)
Total preload torque: Refer to DLN-231, "
Inspection
and Adjustment".
WDIA0381E
Revision: March 2010 2008 QX56

CARRIER COVERDLN-211
< ON-VEHICLE REPAIR > [FRONT FINAL DRIVE: M205]
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CARRIER COVER
Removal and InstallationINFOID:0000000001604447
REMOVAL
1. Remove the front final drive assembly. Refer to DLN-212, "Removal and Installation".
2. Remove the carrier cover bolts and separate the carrier cover from the gear carrier using Tool.
CAUTION:
• Do not damage the mating surface.
• Do not insert flat-bladed screw driver, this will damage the
mating surface.
INSTALLATION
1. Apply 3 mm (0.12 in) bead of sealant to the mating surface of the carrier cover as shown.
• Use Genuine Silicone RTV or equivalent. Refer to GI-15,
"Recommended Chemical Products and Sealants".
CAUTION:
Remove any old sealant adheri ng to the mating surfaces.
Also remove any moisture, oil, or foreign material adhering
to the application and mating surfaces.
2. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque. Refer to DLN-214, "
Disassembly and
Assembly".
3. Install the front final drive assembly. Refer to DLN-212,
"Removal and Installation".
CAUTION:
Fill the front final drive assem bly with recommended differential gear oil. Refer to DLN-207,
"Checking Differential Gear Oil".
Tool number : KV10111100 (J-37228)
PDIA0699E
SDIA3204E
Revision: March 2010
2008 QX56

DLN-212
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
REMOVAL AND INSTALLATION
FRONT FINAL DRIVE
Removal and InstallationINFOID:0000000001604448
REMOVAL
1. Drain the differential gear oil. Refer to
DLN-207, "Changing Differential Gear Oil".
2. Remove the drive shafts from the front final drive assembly. Refer to FAX-9, "
Removal and Installation".
3. Remove the front cross member.
4. Remove the front propeller shaft from the front final drive assembly. Refer to DLN-184, "
Removal and
Installation".
5. Disconnect the vent hose from the front final drive assembly.
6. Support the front final drive assembly using a suitable jack.
1. Front final drive assembly 2. Front cross member
AWDIA0019GB
Revision: March 2010 2008 QX56

FRONT FINAL DRIVEDLN-213
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: M205]
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7. Remove the front final drive assembly bolts, then remove the front final drive assembly.
CAUTION:
Support the front final drive assembly while removing using
a suitable jack.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Make sure there are no pinched or restricted areas on the breather hose caused by folding or bend-ing when installing it.
• Fill the front final drive assembly with differe ntial gear oil after installation. Refer to DLN-207,
"Checking Differential Gear Oil".
BDIA0008E
Revision: March 2010 2008 QX56

DLN-214
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
DISASSEMBLY AND ASSEMBLY
FRONT FINAL DRIVE
Disassembly and AssemblyINFOID:0000000001604449
COMPONENTS
1. Side bearing adjuster
2. Side bearing3. Side gear thrust washer
4. Side gear 5. Lock pin6. Pinion mate thrust washer
7. Pinion mate gear 8. Pinion mate shaft9. Drive pinion
10. Drive pinion height adjusting washer 11. Drive pinion rear bearing 12. Collapsible spacer
13. Breather tube 14. Differential side flange 15. Dust shield
16. Circular clip 17. Side oil seal18. Drive pinion front bearing
19. Front oil seal 20. Companion flange21. Drive pinion lock nut
22. Drain plug 23. Differential side shaft24. Differential side shaft bearing
25. Extension tube 26. O-ring27. Gear carrier
AWDIA0020GB
Revision: March 2010 2008 QX56

FRONT FINAL DRIVEDLN-215
< DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: M205]
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ASSEMBLY INSPECTION AND ADJUSTMENT
• Drain the differential gear oil before inspection and adjustment. Refer to DLN-207, "Changing Differential
Gear Oil".
• Remove and install the carrier cover as necessary for inspection and adjustment. Refer to DLN-211,
"Removal and Installation".
Total Preload Torque
1. Install the differential side shaft and differential side flange if necessary.
CAUTION:
The differential side shaft and differential side flange must be installed in order to measure total
preload torque.
2. Rotate the drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
3. Rotate the drive pinion at least 20 times to check for smooth operation of the bearings.
4. Measure total preload torque using Tool.
NOTE:
Total preload torque = Drive pinion bearing preload torque +
Side bearing preload torque
• If the measured value is out of the specification, check and adjust each part. Adjust the drive pinion
bearing preload torque first, then adjust the side bearing preload torque.
Drive Gear Runout
1. Fit a dial indicator to the drive gear back face.
2. Rotate the drive gear to measure runout.
• If the runout is outside of the limit, check the condition of the drive
gear assembly. Foreign material may be caught between the drive
gear and differential case, or the differential case or drive gear may
be deformed.
CAUTION:
Replace drive gear and drive pinion as a set.
Tooth Contact
28. Plate 29. Differential case30. Drive gear
31. Side bearing cap 32. Filler plug33. Carrier cover
34. Bushing 35. Bearing36 Screw
37 Dowel pin
Tool number : ST3127S000 (J-25765-A)
Total preload torque : Refer to DLN-231, "
Inspection and Adjust-
ment"
PDIA0697E
If the total preload torque is greater than specification
On drive pinion b earings: Replace the collapsible spacer.
On side bearings: Loosen the side bearin g adjuster by the same amount on each
side.
If the total preload torque is less than specification
On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Tighten the side bear ing adjuster by the same amount on each
side.
Runout limit: 0.08 mm (0.0031 in) or less
SPD886
Revision: March 2010 2008 QX56