Page 2009 of 3383

EX-4Revision: November 2009
EXHAUST SYSTEM
2006 QX56
REMOVAL
Remove exhaust system components using power tool.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Always replace exhaust gaskets with new ones when reassembling.
Before installing a new heated oxygen sensor, clean and lube the exhaust tube threads using Tool.
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; replace with a new one.
Do not over-torque the heated oxygen sensor. Doing so may damage the heated oxygen sensor,
resulting in the MIL coming on.
If any mounting insulator is badly deformed, repair or replace it. If deposits such as mud pile up on
the mounting insulators, clean and inspect them.
Temporarily tighten the nuts on the exhaust manifold side and the bolts on the vehicle side. Check
each part for interference with other components, and then tighten the nuts and bolts to specifica-
tion.
INSPECTION AFTER INSTALLATION
With the engine running, check exhaust tube joints for gas leakage and unusual noises.
Check to ensure that mounting brackets and mounting rubbers are installed properly and free from undue
stress. Improper installation could result in excessive noise and vibration. Tool number
A : — (J-43897-18)
B : — (J-43897-12)
Page 2010 of 3383

FAX-1
FRONT AXLE
D DRIVELINE/AXLE
CONTENTS
CE F
G H
I
J
K L
M
SECTION
A
B
FA X
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions ......................................................... ..... 2
PREPARATION ...................................................... ..... 3
Special Service Tools .......................................... ..... 3
Commercial Service Tools ................................... ..... 3
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 4
NVH Troubleshooting Chart ................................ ..... 4
WHEEL HUB ......................................................... ..... 5
On-Vehicle Inspection and Service ..................... ..... 5
WHEEL BEARING INSPECTION .................... ..... 5
Removal and Installation ..................................... ..... 5
REMOVAL ........................................................ ..... 5
INSPECTION AFTER REMOVAL .................... ..... 6
INSTALLATION ................................................ ..... 6DRIVE SHAFT ........................................................
..... 7
Removal and Installation ..................................... ..... 7
REMOVAL ........................................................ ..... 7
INSPECTION AFTER REMOVAL .................... ..... 7
INSTALLATION ................................................ ..... 8
Disassembly and Assembly ................................. ..... 8
DISASSEMBLY ................................................ ..... 8
INSPECTION AFTER DISASSEMBLY ............. ..... 9
ASSEMBLY ...................................................... ... 10
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 13
Wheel Bearing ..................................................... ... 13
Drive Shaft ........................................................... ... 13
Boot Bands .......................................................... ... 13
Page 2011 of 3383
FAX-2
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
PrecautionsEDS003BJ
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 compo-
nent 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 adher-
ing 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.
Page 2012 of 3383
PREPARATIONFAX-3
CE F
G H
I
J
K L
M A
B
FA X
Revision: November 2009 2006 QX56
PREPARATIONPFP:00002
Special Service ToolsEDS003BK
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service Tools EDS003BL
Tool number
(Kent-Moore No.)
Tool nameDescription
ST29020001
(J-24319-01)
Gear arm puller Removing ball joint for steering knuckle
a: 34 mm (1.34 in)
b: 6.5 mm (0.256 in)
c: 61.5 mm (2.421 in)
KV40107300
(—)
Boot band crimping tool Installing boot bands
NT694
ZZA1229D
Tool name
Description
Power tools Removing bolts and nuts
PBIC0190E
Page 2013 of 3383

FAX-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: November 20092006 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS003BM
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FAX-7FAX-9FAX-9FAX-7—
FAX-5
PR-3, "
NVH Troubleshooting Chart
"
FFD-6, "
NVH Troubleshooting Chart
"
Refer to DRIVE SHAFT in this chart.
Refer to WHEEL HUB in this chart.
FSU-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
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 ×××
×××
Page 2014 of 3383

WHEEL HUBFAX-5
CE F
G H
I
J
K L
M A
B
FA X
Revision: November 2009 2006 QX56
WHEEL HUBPFP:43202
On-Vehicle Inspection and ServiceEDS003BN
Make sure the mounting conditions (looseness, backlash) of each component and component status (wear,
damage) are normal.
WHEEL BEARING INSPECTION
Move wheel hub in the axial direction by hand. Make sure there
is no looseness of wheel bearing.
Rotate wheel hub and make sure there is no unusual noise or
other irregular conditions. If there are any irregular conditions,
replace wheel hub and bearing assembly.
Removal and InstallationEDS003BO
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-22, "
Removal and Installation of Brake Caliper and
Disc Rotor" .
NOTE:
Do not press brake pedal while brake caliper is removed. Axial end play limit : 0.05 mm (0.002 in) or less
SMA571A
1. Disc rotor
2. Wheel hub and bearing assembly 3. Wheel stud
4. Splash guard 5. Steering knuckle⇐Front
WDIA0328E
Page 2015 of 3383

FAX-6
WHEEL HUB
Revision: November 20092006 QX56
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 FA X - 7 , "
Removal and Installation" .
6. Remove wheel sensor. Refer to BRC-64, "
Removal and Installation" .
Inspect the wheel sensor O-ring, replace 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.
8. Remove splash guard and wheel hub and bearing assembly from steering knuckle.
INSPECTION AFTER REMOVAL
Check for deformity, cracks and damage on each part, replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
Use new bolts when installing the wheel hub and bearing assembly.
When installing disc rotor on wheel hub and bearing assembly,
position the disc rotor according to alignment mark.
(When not using the alignment mark, refer to BR-25, "
DISC
ROTOR INSPECTION" .)
When installing wheel and tire. Refer to WT-7, "Rotation" .
WDIA0044E
WDIA0044E
Page 2016 of 3383

DRIVE SHAFTFAX-7
CE F
G H
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J
K L
M A
B
FA X
Revision: November 2009 2006 QX56
DRIVE SHAFTPFP:39100
Removal and InstallationEDS003BP
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-22, "
Removal and Installation of Brake Caliper and Disc 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-10, "
Removal and
Installation" .
6. Separate upper link ball joint stud from steering knuckle using To o l .
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 shaft, 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 direction. 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
WDIA0329E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
RAA0030D