2004 INFINITI QX56 check oil

DRIVE SHAFT
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DRIVE SHAFTPFP:39100
Removal and InstallationEDS001B5
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
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 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 nut 3. Drive shaft
LDIA0159E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
RAA0030D

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PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
PrecautionsEDS0035E
CAUTION:

Before starting diagnosis of the vehicle, understand symptoms well. Perform correct and system-
atic operations.

Check for the correct installation status prior removal or disassembly. When matching marks are
required, be sure they do not interfere with the function of the parts they are applied to.

Carry out an overhaul in a clean work place, Using a dust proof room is recommended.

Before disassembly, using steam or white gasoline, completely remove sand and mud from the
exterior the unit, preventing them from entering into the unit during disassembly or assembly.

Check appearance of the disassembled parts for damage, deformation, and abnormal wear. If a
malfunction is detected, replace it with a new one.

Normally replace lock pins, oil seals, and bearings with new ones every times they are removed.

In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to out-
side. If tightening sequence is specified, observe it.

Clean and flush the parts sufficiently and blow them dry.

Be careful not to damage the sliding surfaces and mating surface.

When applying sealant, remove the old sealant from the mounting surface; then remove any mois-
ture, oil, and foreign materials from the application and mounting surfaces.

Always use shop paper for cleaning the inside of components.

Avoid using cotton gloves or a shop cloth to prevent entering of lint.

During assembly, observe the specified tightening torque, and new differential gear oil, Vaseline,
or multi-purpose grease, as specified for each vehicle, when necessary.
Precautions for Liquid GasketEDS0035F
REMOVAL OF LIQUID GASKET SEALING

After removing nuts and bolts, separate the mating surface and
remove old liquid gasket sealing using Tool.
CAUTION:
Be careful not to damage the mating surfaces.

Tap seal cutter to insert it, and then slide it by tapping on the
side as shown.

In areas where Tool is difficult to use, use plastic hammer to
lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using scraper, remove old liquid gasket adhering to the gasket
application surface and the mating surface.

Remove liquid gasket completely from the groove of the gas-
ket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.Tool number : KV10111100 (J-37228)
WBIA0566E
PBIC0003E

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
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Revision: August 20072004 QX56
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS0035I
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FFD-15FFD-15

FFD-15
FFD-16
FFD-16
MA-24, "
Checking Final Drive Oil
"
PR-3, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
" (FSU) and RSU-5, "
NVH Troubleshooting Chart
" (RSU)
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
" (FAX) and RAX-4, "
NVH Troubleshooting Chart
" (RAX)
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Rough gear tooth
Improper gear contact
Tooth surfaces worn
Incorrect backlash
Companion flange excessive runout
Improper gear oil
Propeller shaft
Axle and suspension
Tires
Road wheel
Drive axle
Brakes
Steering
Symptom Differential Noise×××××××××××××

FRONT FINAL DRIVE ASSEMBLY
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ASSEMBLY INSPECTION AND ADJUSTMENT

Before inspection and adjustment, drain gear oil.
Total Preload Torque
1. Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
2. Rotate drive pinion at least 20 times to check for smooth operation of the bearing.
3. Measure total preload with preload gauge.

If measured value is out of the specification, disassemble it to
check and adjust each part. Adjust the pinion bearing preload
and side bearing preload.
Adjust the pinion bearing preload first, then adjust the side bear-
ing preload.
Tooth Contact
1. Remove rear cover. Refer to FFD-11, "REMOVAL" .
2. Thoroughly clean drive gear and drive pinion teeth.
3. Lightly apply a mixture of powdered ferric oxide and oil or the
equivalent. Apply it to 3 or 4 teeth of drive gear drive side.
4. Rotate drive gear back and forth several times, check drive pin-
ion gear to drive gear tooth contact.
CAUTION:
Check tooth contact on drive side and reverse side.
34. Bushing 35. Bearing 36 Screw
37 Dowel pin
Tool number : ST3127S000 (J-25765-A)
Total preload (with oil seal):
2.98 - 4.76 N·m (0.31 - 0.48 kg-m, 27 - 42 in-lb)
SDIA2220E
When the preload torque is large
On pinion bearings: Replace the collapsible spacer.
On side bearings: Loosen the side bearing adjust nuts at the same force on each side.
When the preload is small
On pinion bearings: Tighten the drive pinion nut.
On side bearings: Tighten the side bearing adjust nuts at the same force on each side.
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FRONT FINAL DRIVE ASSEMBLY
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Revision: August 20072004 QX56
5. If the runout value is outside the runout limit, follow the procedure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion by 90° step, and
search for the position where the runout is the minimum.
b. If the runout value is still outside of the limit after the phase has been changed, possible cause will be an
assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.
c. If the runout value is still outside of the limit after the check and repair, replace companion flange.
DISASSEMBLY
Differential Assembly
1. Drain gear oil, if necessary.
2. Remove differential side shaft with a soft hammer.
3. Remove differential side flange with a soft hammer.
4. Remove extension tube and O-ring.
5. Place a small hole in seal case, using a suitable punch or drill.
SDIA2223E
SDIA2224E
SDIA3205E
LDIA0129E

FRONT FINAL DRIVE ASSEMBLY
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Revision: August 20072004 QX56
2. Press-fit front bearing outer race with Tools.
3. Temporarily install drive pinion height adjusting washer.
When hypoid gear set has been replaced

Select drive pinion height adjusting washer. Refer to FFD-33,
"Pinion Height Adjusting Washer" .
When hypoid gear set has been reused

Temporarily install the removed drive pinion height adjusting
washer or same thickness washer to drive pinion.
4. Install selected drive pinion height adjusting washer to drive pin-
ion, and press-fit pinion rear bearing inner race in it, using a
press and Tool.
5. Place pinion front bearing inner race in gear carrier.
6. Apply multi-purpose grease to cavity at sealing lips of oil seal.
Install front oil seal, using Tools.
7. Perform checking and adjusting the tooth contact and backlash
of the hypoid gear following the procedure below.
a. Assemble the drive pinion to the gear carrier.
CAUTION:
Do not assemble a collapsible spacer.Tool number A: ST35271000 ( — )
B: KV40104810 ( — )
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Tool number : — C-4040
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Tool number A: KV38100500 (J-25273)
B: KV38102200 ( — )
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FRONT FINAL DRIVE ASSEMBLY
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Revision: August 20072004 QX56
h. Align mark on bearing cap with that on gear carrier and install
bearing cap on gear carrier.

Do not tighten at this step. This allows further tightening of
side bearing adjusters.
i. Check and adjust the tooth contact and backlash. Refer to FFD-
15, "Tooth Contact" and FFD-16, "Backlash" .
j. Remove differential case assembly.
k. Remove companion flange.
l. Remove drive pinion (together with rear bearing inner race.)
8. Assemble collapsible spacer to drive pinion.
CAUTION:
Do not reuse collapsible spacer.
9. Place collapsible spacer, drive pinion height adjusting washer
and drive pinion in gear carrier.
10. Insert companion flange onto drive pinion. Tap the companion
flange with a soft hammer until fully seated.
11. Apply anti-corrosive oil to the thread and seat of drive pinion nut,
and temporarily tighten drive pinion nut to drive pinion.
CAUTION:
Do not reuse drive pinion nut.
12. Rotate drive pinion at least 20 times to check for smooth opera-
tion of the bearing.
SDIA2258E
SDIA2234E
SDIA2255E
SDIA2266E
Tool number : KV38108300 (J-44195)
PDIA0182E

FFD-28
FRONT FINAL DRIVE ASSEMBLY
Revision: August 20072004 QX56
13. Tighten to drive pinon nut, while adjust pinion bearing preload
torque.
CAUTION:

Adjust the lower limit of the drive pinion nut tightening
torque first.

If the preload torque exceeds the specified value, replace collapsible spacer and tighten it again
to adjust. Never loosen drive pinion nut to adjust the preload torque.

After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
14. Install differential case assembly. Refer to FFD-28, "
Differential Assembly" .
CAUTION:
Do not install rear cover yet.
15. Check and adjust tooth contact, drive gear to drive pinion backlash, and companion flange runout. Refer
to FFD-15, "
Tooth Contact" , FFD-16, "Backlash" , FFD-16, "Companion Flange Runout" .
Recheck above items. Readjust the above description, if necessary.
16. Check total preload torque. Refer to FFD-15, "
Total Preload Torque" .
17. Install rear cover. Refer toFFD-11, "
INSTALLATION" .
Differential Assembly
1. Apply gear oil to contact surfaces of each gear, thrust washers
and differential case.
2. Install the removed thrust washer or same thickness washer to
side gear.
3. Install the side gears, thrust washers, pinion mate gears and
thrust washers into differential case.Tool number : ST3127S000 (J-25765-A)
Drive pinion nut tightening torque:
298 - 678 N·m (31 - 69 kg-m, 220 - 500 ft-lb)
Pinion bearing preload:
2.3 - 3.4 N·m (24 - 34 kg-cm, 21 - 30 in-lb)
SDIA2220E
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