torque INFINITI QX56 2006 Factory Service Manual

RFD-1
REAR FINAL DRIVE
D DRIVELINE/AXLE
CONTENTS
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SECTION
A
B
RFD
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions for Servicing Rear Final Drive ......... ..... 2
PREPARATION ...................................................... ..... 3
Special Service Tools .......................................... ..... 3
Commercial Service Tools ................................... ..... 5
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 7
NVH Troubleshooting Chart ................................ ..... 7
DIFFERENTIAL GEAR OIL ................................... ..... 8
Changing Differential Gear Oil ............................ ..... 8
DRAINING ........................................................ ..... 8
FILLING ............................................................ ..... 8
Checking Differential Gear Oil ............................. ..... 8
OIL LEAKAGE AND OIL LEVEL ...................... ..... 8
FRONT OIL SEAL ................................................. ..... 9
Removal and Installation ..................................... ..... 9
REMOVAL ........................................................ ..... 9
INSTALLATION ................................................ ..... 9
SIDE OIL SEAL ..................................................... ....11
Removal and Installation ..................................... .... 11
REMOVAL ........................................................ .... 11
INSTALLATION ................................................ .... 11CARRIER COVER .................................................
... 12
Removal and Installation ..................................... ... 12
REMOVAL ........................................................ ... 12
INSTALLATION ................................................ ... 12
REAR FINAL DRIVE ASSEMBLY ......................... ... 13
Removal and Installation ..................................... ... 13
REMOVAL ........................................................ ... 13
INSTALLATION ................................................ ... 14
Disassembly and Assembly ................................. ... 15
COMPONENTS ................................................ ... 15
ASSEMBLY INSPECTION AND ADJUSTMENT ... 16
DISASSEMBLY ................................................ ... 19
INSPECTION AFTER DISASSEMBLY ............. ... 23
ADJUSTING AND SELECTING WASHERS .... ... 24
ASSEMBLY ...................................................... ... 26
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 32
General Specifications ......................................... ... 32
Inspection and Adjustment .................................. ... 32
DRIVE GEAR RUNOUT ................................... ... 32
SIDE GEAR CLEARANCE ............................... ... 32
PRELOAD TORQUE ........................................... 32
BACKLASH ...................................................... ... 32
COMPANION FLANGE RUNOUT .................... ... 32
SELECTIVE PARTS ......................................... ... 32

RFD-2
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
Precautions for Servicing Rear Final DriveEDS0044K

Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.

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

Overhaul should be done in a clean work area, a dust proof area is recommended.

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

Always use shop paper for cleaning the inside of components.

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

Check appearance of the disassembled parts for damage, deformation, and abnormal wear. Replace
them with new ones if necessary.

Gaskets, seals and O-rings should be replaced any time the unit is disassembled.

Clean and flush the parts sufficiently and blow them dry.

Be careful not to damage sliding surfaces and mating surfaces.

When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil,
and foreign materials from the application and mating surfaces.

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

During assembly, observe the specified tightening torque.

Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.

RFD-4
PREPARATION
Revision: November 20092006 QX56
KV38100800
(J-25604-01)
AttachmentSecuring unit assembly
a: 541 mm (21.30 in) dia.
b: 200 mm (7.87 in) dia.
ST3127S000
(J-25765-A)
Preload gauge
1. GG91030000
(J-25765)
Torque wrench
2. HT62940000
(—)
Socket adapter (1/2 in)
3. HT62900000
(—)
Socket adapter (3/8 in) Measuring drive pinion bearing preload torque
and total preload torque
KV10111100
(J-37228)
Seal cutter Removing carrier cover
ST3306S001
(—)
Differential side bearing puller set
1.ST33051001
(—)
Puller
2.ST33061000
(J-8107-2)
Base Removing side bearing inner race
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia.
ST30021000
(—)
Bearing puller Removing drive pinion rear bearing inner race
KV38100200
(J-26233)
Drift Installing side bearing inner race
a: 65 mm (2.55 in) dia.
b: 49 mm (1.92 in) dia.
Tool name
Tool number
(Kent-Moore No.)
Description
SDIA0267E
NT124
S-NT046
NT072
ZZA0700D
ZZA1143D

PREPARATIONRFD-5
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RFD
Revision: November 2009 2006 QX56
Commercial Service ToolsEDS0044M
ST33081000
(—)
DriftInstalling side bearing inner race
a: 43 mm (1.69 in) dia.
b: 33.5 mm (1.31 in) dia.
ST35325000
(—)
Drift Installing drive pinion front bearing outer race
(use with ST30621000)
ST30621000
(—)
Drift Installing drive pinion front bearing outer race
a: 79 mm (3.11 in) dia.
b: 59 mm (2.32 in) dia.
ST30022000
(—)
Drift Installing drive pinion rear bearing inner race
a: 110 mm (4.33 in) dia.
b: 46 mm (1.81 in) dia.
HT72400000
(—)
Slide hammer Removing differential case assembly
—
(J-8129)
Spring gauge Measuring turning torque
KV10112100
(BT-8653-A)
Angle wrench Tightening bolts for drive gear
Tool name
Tool number
(Kent-Moore No.)
Description
ZZA0810D
S-NT090
ZZA0810D
ZZA0920D
S-NT125
NT127
NT014

RFD-8
DIFFERENTIAL GEAR OIL
Revision: November 20092006 QX56
DIFFERENTIAL GEAR OILPFP:KLD30
Changing Differential Gear OilEDS0044O
DRAINING
1. Stop the engine.
2. Remove the drain plug and gasket from the rear final drive
assembly to drain the differential gear oil.
3. Install the drain plug with a new gasket to the rear final drive assembly. Tighten to the specified torque. Refer to RFD-15,
"COMPONENTS" .
CAUTION:
Do not reuse gasket.
FILLING
1. Remove the filler plug and gasket from the rear final drive assembly.
2. Fill the rear 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 a new gasket on it to the rear final drive assembly. Tighten to the specified torque. Refer to RFD-15,
"COMPONENTS" .
CAUTION:
Do not reuse gasket.
Checking Differential Gear OilEDS0044P
OIL LEAKAGE AND OIL LEVEL
1. Make sure that differential gear oil is not leaking from the rear 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 checking differential gear oil level.
3. Install the filler plug with a new gasket on it to the rear final drive assembly. Tighten to the specified torque. Refer to RFD-15,
"COMPONENTS" .
CAUTION:
Do not reuse gasket.
LLIA0068E
Differential gear oil
grade and capacity : Refer to
MA-11, "Fluids
and Lubricants" .
LLIA0068E
LLIA0068E

FRONT OIL SEALRFD-9
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RFD
Revision: November 2009 2006 QX56
FRONT OIL SEALPFP:38189
Removal and InstallationEDS0044Q
REMOVAL
1. Remove the drive shafts from the rear final drive assembly. Refer to RAX-7, "Removal and Installation" .
2. Remove the side flanges and side oil seals. Refer to RFD-11, "
Removal and Installation" .
3. Remove the rear propeller shaft. Refer to PR-8, "
Removal and Installation" .
4. Measure the total preload torque. Refer to RFD-16, "
Total Preload Torque" .
NOTE:
Record the total preload torque measurement.
5. Remove the drive pinion lock nut using Tool.
6. Put matching marks on the companion flange and drive pinion using paint.
CAUTION:
Use paint to make the matching marks. Do not damage the
companion flange or drive pinion.
7. Remove the companion flange using suitable tool.
8. Remove the front oil seal using Tool.
INSTALLATION
1. Apply multi-purpose grease to the lips of the new front oil seal. Then drive the new front oil seal in evenly until it becomes flush
with 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.Tool number : KV40104000 ( — )
SDIA1142E
SDIA1054E
Tool number : KV381054S0 (J-34286)
SDIA0485E
Tool number : ST15310000 ( — )
PDIA0565E

RFD-10
FRONT OIL SEAL
Revision: November 20092006 QX56
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 preload
torque 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, 5ft-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 RFD-15, "
COMPONENTS" .

Do not loosen drive pinion lock nut to adjust the total preload torque. If the total preload torque
exceeds the specifications, replace the collapsible spacer and tighten it again to adjust. Refer to
RFD-15, "
Disassembly and Assembly" .

After adjustment, rotate drive pinion back and forth 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 RFD-8, "
Checking Differential Gear
Oil" .
Tool number A: KV40104000 ( — )
B: ST3127S000 (J-25765-A)
Total preload torque: Refer to RFD-16, "
To ta l P r e l o a d
To r q u e" .
WDIA0380E

RFD-12
CARRIER COVER
Revision: November 20092006 QX56
CARRIER COVERPFP:38351
Removal and InstallationEDS0044S
REMOVAL
1. Remove the rear final drive assembly. Refer to RFD-13, "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 screwdriver, this will damage the
mating surface.
INSTALLATION
1. Apply a 3 mm (0.12 in) bead of sealant to the mating surface ofthe carrier cover as shown.

Use Genuine Silicone RTV or equivalent. Refer to GI-46,
"Recommended Chemical Products and Sealants" .
CAUTION:
Remove any old sealant adhering 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 RFD-15, "
COMPONENTS" .
3. Install the rear final drive assembly. Refer to RFD-13, "
Removal
and Installation" .
CAUTION:
Fill the rear final drive assembly with recommended differential gear oil. Refer to RFD-8, "
DIFFER-
ENTIAL GEAR OIL" .
Tool number : KV10111100 (J-37228)
WDIA0123E
WDIA0282E

RFD-16
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
ASSEMBLY INSPECTION AND ADJUSTMENT

Drain the differential gear oil before inspection and adjustment. Refer to RFD-8, "DIFFERENTIAL GEAR
OIL" .

Remove and install the carrier cover as necessary for inspection and adjustment. Refer to RFD-12, "CAR-
RIER COVER" .
Total Preload Torque
1. Remove the side flanges if necessary. Refer to RFD-19, "Side Flange" .
CAUTION:
The side flanges shaft must removed 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 the 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.
CAUTION:
Select a side bearing adjusting washer for right and left individually.
1. Drive pinion lock nut 2. Companion flange 3. Front oil seal
4. Drive pinion front bearing 5. Collapsible spacer 6. Drive pinion rear bearing
7. Drive pinion height adjusting washer 8. Drive pinion 9. Gear carrier
10. Drive gear 11. Pinion mate shaft 12. Lock pin
13. Pinion mate gear 14. Pinion mate thrust washer 15. Side gear
16. Side gear thrust washer 17. Differential case 18. Side bearing
19. Side bearing adjusting washer 20. Bearing cap 21. Carrier cover
22. Filler plug 23. Drain plug 24. Side oil seal
Tool number : ST3127S000 (J-25765-A)
Total preload torque:
2.05 - 4.11 N·m (0.21 - 0.42 kg-m, 19 - 36 in-lb)
SPD884
If the total preload torque is greater than specificationOn drive pinion bearings: Replace the collapsible spacer.
On side bearings: Use thinner side bearing adjusting washers by the same amount on each side. Refer to RFD-33, "
Side Bearing Adjusting
Washer" .
If the total preload torque is less than specification On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Use thicker side bearing adjusting washers by the same amount on each side. Refer to RFD-33, "
Side Bearing Adjust-
ing Washer" .

RFD-18
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56

If the tooth contact is near the face (face contact), or near the
heel (heel contact), use a thicker drive pinion height adjusting
washers to move the drive pinion closer to the drive gear.
Refer to RFD-33, "
Drive Pinion Height Adjusting Washer" .

If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), use a thinner drive pinion height adjusting
washers to move the drive pinion farther from the drive gear.
Refer to RFD-33, "
Drive Pinion Height Adjusting Washer" .
Backlash
1. Fit a dial indicator to the drive gear face to measure the back-
lash.

If the backlash is outside of the specification, change the thick-
ness of the side bearing adjusting washers.
CAUTION:
Do not change the total thickness of side bearing adjusting washers as it will change the side bearing
preload torque.
Companion Flange Runout
1. Rotate companion flange and check for runout on the outer face of the companion flange using suitable tool.
2. If the runout is outside of the runout limit, follow the procedure below to adjust.
a. Rotate the companion flange on the drive pinion by 90° , 180°
and 270 ° while checking for the position where the runout is
minimum.
b. If the runout is still outside of the runout limit after the companion flange has been rotated on the drive pinion, possible cause
PDIA0440E
PDIA0441E
Backlash : 0.13 - 0.18 mm (0.0051 - 0.0070 in)
If the backlash is greater than specification:
Make side bearing adjusting washer thicker on drive
gear back side, and side bearing adjusting washer
thinner on drive gear tooth side by the same amount.
Refer to RFD-33, "
Side Bearing Adjusting Washer" .
If the backlash is less than specification: Make side bearing adjusting washer thinner on drive
gear back side, and side bearing adjusting washer
thicker on drive gear tooth side by the same amount.
Refer to RFD-33, "
Side Bearing Adjusting Washer" .
SPD513
Runout limit : 0.08 mm (0.0031 in) or less
WDIA0231E