2008 INFINITI QX56 4 wheel drive

PRECAUTIONSFAX-3
< PRECAUTION >
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5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
PrecautionINFOID:0000000001534446
Observe the following precautions when disassembling and servicing the wheel hub and drive shafts.
• Perform work in a location which is as dust-free as possible.
• Before disassembling and servicing, clean the outside of parts.
• Prevention of the entry of foreign objects must be taken into account during disassembly of the component
parts.
• Disassembled parts must be carefully reassembled in the correct order. If work is interrupted, a clean cover
must be placed over parts.
• Paper shop cloths must be used. Fabric shop cloths must not be used because of the danger of lint adhering to parts.
• Disassembled parts (except for rubber parts) should be cleaned with a suitable solvent which shall be removed by blowing with air or wiping with paper shop cloths.
Revision: March 2010 2008 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGFAX-5
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001534449
Use the chart below to help you find t he cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FA X - 9FA X - 11FA X - 11FA X - 9—
FA X - 6
DLN-182, "
NVH Troubleshooting Chart
"
DLN-206, "
NVH Troubleshooting Chart
"
Refer to DRIVE SHAFT in this chart.
Refer to WHEEL HUB in this chart.
FSU-6, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
BR-6, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
Wheel bearing damage
PROPELLER SHAFT
FRONT FINAL DRIVE
DRIVE SHAFT
WHEEL HUB
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
STEERING
Symptom DRIVE SHAFT
Noise, Vibration
×× × × × ×××× ×
Shake × × ×× ×××× ×
WHEEL HUB Noise
×× × × × ×××× ×
Shake ×× × × ×××× ×
Vibration ×× × × ×× ×
Shimmy ×××××× ×
Shudder ×× ××× ×
Poor quality ride or
handling ×××
×××
Revision: March 2010 2008 QX56

WHEEL HUBFAX-7
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
WHEEL HUB
Removal and InstallationINFOID:0000000001534453
REMOVAL
1. Remove wheel and tire using power tool.
2. Remove engine under cover using power tool.
3. Without disassembling the hydraulic lines, remove caliper torque member bolts using power tool. Then
reposition brake caliper aside with wire. Refer to BR-31, "
Removal and Installation of Brake Caliper and
Rotor" .
NOTE:
Do not press brake pedal while brake caliper is removed.
4. Put alignment mark on disc rotor and wheel hub and bearing assembly, then remove disc rotor.
5. On 4WD model, remove cotter pin, then remove lock nut from drive shaft using power tool. Then remove end of drive shaft from wheel hub and bearing assembly. Refer to FAX-9, "
Removal and Installation" .
6. Remove wheel sensor. Refer to BRC-114, "
Removal and Installation" .
• Inspect the wheel sensor O-ring, replac e the wheel sensor assembly if damaged.
• Clean the wheel sensor hole and mounting surface with a suitable brake cleaner and clean lint-free shop rag. Be careful that dirt and debris do not enter the axle bearing area.
• Apply a coat of suitable grease to the wheel sensor O-ring and mounting hole.
CAUTION:
Do not pull on the wheel sensor harness.
7. Remove wheel hub and bearing assembly bolts using power tool.
1. Disc rotor 2. Wheel hub and bearing assembly 3. Wheel stud
4. Splash guard 5. Steering knuckle Front
AWDIA0423GB
WDIA0044E
Revision: March 2010 2008 QX56

DRIVE SHAFTFAX-9
< REMOVAL AND INSTALLATION >
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DRIVE SHAFT
Removal and InstallationINFOID:0000000001534458
REMOVAL
1. Remove wheel and tire using power tool.
2. Remove engine under cover using power tool.
3. Remove wheel sensor harness from mount on knuckle. CAUTION:
Do not pull on wheel sensor harness.
4. Without disassembling the hydraulic lines, remove brake caliper using power tool. Reposition it aside with wire. Refer to BR-31, "
Removal and Installation of Brake Caliper and Rotor" .
NOTE:
Avoid depressing brake pedal while brake caliper is removed.
5. Remove coil spring and shock absorber assembly using power tool. Refer to FSU-15, "
Removal and
Installation" .
6. Separate upper link ball joint stud from steering knuckle using Tool.
• Support lower link with jack.
7. Remove cotter pin, then remove drive shaft nut.
8. Remove drive shaft mounting bolts from front final drive.
9. Remove drive shaft from wheel hub and bearing assembly. CAUTION:
• When removing drive shaf t, do not apply an excessive
angle to drive shaft joint. Also be careful not to exces-
sively extend slide joint.
INSPECTION AFTER REMOVAL
• Move joint up, down, left, right, and in axial directi on. Check for any rough movement or significant loose-
ness.
• Check boot for cracks or other damage, and for grease leakage.
• If damaged, disassemble drive shaft to verify damage, and repair or replace as necessary.
1. Cotter pin 2. Drive shaft nut3. Drive shaft
LDIA0159E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
RAA0030D
Revision: March 2010 2008 QX56

FAX-10
< REMOVAL AND INSTALLATION >
DRIVE SHAFT
INSTALLATION
Installation is in the reverse order of removal.
• Tighten wheel nuts to specification. Refer to WT-48, "
Rotation".
Revision: March 2010 2008 QX56

FAX-12
< DISASSEMBLY AND ASSEMBLY >
DRIVE SHAFT
4. Remove the snap ring, then remove the ball cage, steel ball,inner race assembly from the drive shaft.
5. Remove the boot from the drive shaft.
6. Remove any old grease on the housing using paper towels.
Wheel Side
1. Mount the drive shaft in a vise. CAUTION:
When mounting the drive shaft in a vise, use copp er or aluminum plates between the vise and the
drive shaft.
2. Remove the boot bands, then remove the boot from the joint sub-assembly.
3. Screw a suitable drive shaft puller 30 mm (1.18 in) or more into the threaded part of the joint sub-assembly. Pull the joint sub-
assembly off of the drive shaft as shown.
NOTE:
Align the sliding hammer and drive shaft and remove the joint
sub-assembly by pulling straight out.
CAUTION:
• If the joint sub-assembly cannot be removed after five ormore attempts, replace the drive shaft and joint sub-
assembly as a set.
4. Remove the boot from the drive shaft.
5. Remove the circlip from the drive shaft.
6. While rotating the ball cage, remove any old grease from the joint sub-assembly using paper towels.
INSPECTION AFTER DISASSEMBLY
Drive Shaft
• Replace the drive shaft if there is any runout, cracking, or other damage.
Joint Sub-assembly
• Check for any rough rotation or unusual axial looseness.
• Clean any foreign material from inside the joint sub-assembly.
• Check for any compression scars, cracks, or fractures.
CAUTION:
If any defective conditions are found in the joint sub-assembly comp onents, replace the entire joint
sub-assembly.
Sliding Joint Side Housing
• Check for any compression scars, cracks, fracture s, or unusual wear on the ball rolling surface.
• Check for any damage to the drive shaft screws.
• Check for any deformation of the boot installation components.
Ball Cage
• Check the sliding surface for any compression scars, cracks, or fractures.
Steel Ball
• Check for any compression scars, cr acks, fractures, or unusual wear.
Inner Race
SFA514A
SDIA0606E
Revision: March 2010 2008 QX56

FAX-14
< DISASSEMBLY AND ASSEMBLY >
DRIVE SHAFT
7. Install the boot securely into the grooves (indicated by * marks)as shown.
CAUTION:
If there is grease on boot mounting surfaces (indicated by *
marks) of shaft and housing, boot may come off. Remove
all grease from surfaces.
8. Check that the boot installation length “L” is the length indicated below. Insert a suitable tool into the large end of the boot, as
shown. Bleed air from the boot to prevent boot deformation.
CAUTION:
• The boot may break if the boot installati on length is less than the specified value.
• Do not contact inside surface of boot with tip of the suitable tool.
9. Secure the large and small ends of the boot with the new boot bands as shown.
NOTE:
Discard the old boot bands and use new ones for assembly.
10. After installing the sliding joint housing to the drive shaft, rotate the boot to check that the boot is posi-
tioned correctly. If the boot is not positioned correctly , reposition the boot and secure the boot using a new
boot band.
Wheel Side
1. Insert the Genuine NISSAN Grease or equivalent, into the joint
sub-assembly serration hole until the grease begins to ooze
from the ball groove and serration hole. Refer to MA-12, "
Fluids
and Lubricants". After inserting the grease, use a shop cloth to
wipe off the grease that has oozed out.
2. Wrap the serrated part of the drive shaft with tape. Install the boot band and boot onto the shaft. Do not damage the boot.
NOTE:
Discard the old boot band and boot and use a new one for
assembly.
3. Remove the protective tape wound around the serrated part of the drive shaft. Boot installation length
“L ” : 145 mm (5.71 in)
WDIA0287E
SFA395
SDIA1127E
SFA800
Revision: March 2010 2008 QX56

FAX-16
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Wheel BearingINFOID:0000000001534462
Drive ShaftINFOID:0000000001534463
Boot BandsINFOID:0000000004913882
Unit: mm (in)
Wheel bearing axial end play0.05 mm (0.002 in) or less
Drive shaft joint typeFinal drive side Rzeppa
Wheel side
Rzeppa
Grease Quality
Nissan Genuine Grease or
equivalent
Capacity Final drive side
130 - 150 g (4.58 - 5.29 oz)
Wheel side 145 - 165 g (5.11 - 5.82 oz)
Boot length Final drive side "L"
145 mm (5.71 in)
Wheel side "L" 168.4 mm (6.63 in)
WDIA0055E
Dimension "M" 1.0 - 4.0 (0.039 - 0.157)
DSF0047D
Revision: March 2010 2008 QX56