torque INFINITI QX56 2006 Factory Service Manual

RFD-24
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
ADJUSTING AND SELECTING WASHERS
Side Gear Back Clearance

Assemble the differential parts if they are disassembled. Refer to RFD-28, "Differential Assembly" .
1. Place the differential case straight up so that the side gear to be measured is upward.
2. Using feeler gauges, measure the clearance between the side gear back and differential case at three different points, while
rotating the side gear. Average the three readings to calculate
the clearance. (Measure the clearance of the other side as well.)

If the side gear back clearance is outside of the specification,
use a thicker or thinner side gear thrust washer to adjust.
Refer to RFD-32, "
Side Gear Thrust Washer" .
CAUTION:

Insert feeler gauges with the same thickness on both
sides to prevent side gear from tilting.

Each gear should rotate smoothly without excessive
resistance during differential motion.

Select a side gear thrust washer for right and left individ-
ually.
NOTE:
Side gear back clearance is clearance between side gear and differential case for adjusting side gear
backlash.
Side Bearing Preload Torque

A selection of side bearing adjusting washers is required for successful completion of this procedure.
1. Apply differential gear oil to the side bearings, and install the dif- ferential case assembly with the side bearing outer races into
the gear carrier.
CAUTION:
Do not reuse side bearing outer race when replacing side
bearing inner race (replace as a set).
PDIA0460E
Side gear back clearance: 0.20 mm (0.0079 in) or less.
If the side gear back clearance is greater than
specification:
Use a thicker side gear thrust washer.
If the side gear back clearance is less than
specification: Use a thinner side gear thrust washer.
PDIA0576E
SPD527

REAR FINAL DRIVE ASSEMBLYRFD-25
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2. Insert the left and right original side bearing adjusting washers in
place between side bearings and gear carrier.
3. Align the matching mark on the side bearing cap with the match- ing mark on the gear carrier.
4. Install the side bearing caps and tighten the side bearing cap bolts to the specified torque. Refer to RFD-15, "
COMPO-
NENTS" .
5. Turn the differential assembly several times to seat the side bearings.
6. To determine side bearing preload torque, measure the pulling force of the differential assembly at the drive gear bolt using
To o l .
NOTE:
If pulling force of the differential assembly at the drive gear bolt
is within specification, side bearing preload torque will also be
within specification. Refer to RFD-32, "
PRELOAD TORQUE" .
7. If the pulling force is outside the specification, use a thicker or thinner side bearing adjusting washer to adjust. Refer to RFD-
33, "Side Bearing Adjusting Washer" .
CAUTION:
Select a side bearing adjusting washer for right and left
individually.
8. Record the total amount of washer thickness required for the correct side bearing preload torque.
SPD924
SDIA1795E
Tool number : — (J-8129)
Specification : 34.2 - 39.2 N (3.5 - 4.0 kg, 7.7 - 8.8 lb) of pulling force at the drive gear bolt
SPD194A
If the pulling force is less than the specification:
Use a thicker side bearing adjusting washer.
If the pulling force is greater than the specification: Use a thinner side bearing adjusting washer.
SPD772

REAR FINAL DRIVE ASSEMBLYRFD-27
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7. Press the drive pinion front bearing inner race to the drive pinion
as far as drive pinion lock nut can be tightened using suitable
spacer.
8. 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.
9. Install the companion flange to the drive pinion while aligning the matching marks.
10. 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 drive pinion bearing preload torque using Tool B.
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" .

If the drive pinion bearing preload torque exceeds the
specified value, replace collapsible spacer and tighten it
again to adjust. Do not loosen drive pinion lock nut to
adjust the drive pinion bearing preload torque.

After adjustment, rotate drive pinion back and forth 2 to 3
times to check for unusual noise, rotation malfunction,
and other malfunctions.
11. Check companion flange runout. Refer to RFD-18, "
Companion Flange Runout" .
12. Install the differential case assembly. Refer to RFD-28, "
Differential Assembly" .
SPD896
Tool number : ST15310000 ( — )
PDIA0563E
Tool number A: KV40104000 ( — )
B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque: 1.77 - 2.64 N·m (0.18 - 0.26 kg-m, 16 - 23 in-lb)
WDIA0379E

REAR FINAL DRIVE ASSEMBLYRFD-29
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7. Align the matching mark of the differential case with the mark of
the drive gear, then place the drive gear onto the differential
case.
8. Apply thread locking sealant into the threaded holes of the drive gear and install the bolts.

Use Genuine Medium Strength Thread Locking Sealant or
equivalent. Refer to GI-46, "
Recommended Chemical Prod-
ucts and Sealants" .
CAUTION:
Make sure the drive gear back and threaded holes are
clean.
9. Tighten the drive gear bolts to the specified torque. Refer to RFD-15, "
COMPONENTS" . After tightening the drive gear bolts
to the specified torque, tighten an additional 34 ° using Tool.
CAUTION:

Always use Tool. Avoid tightening based on visual check
alone.

Tighten drive gear bolts in a crisscross pattern.
10. Press the side bearing inner races into the differential case using Tools.
CAUTION:
Do not reuse side bearing inner race.
11. Install the differential case assembly with the side bearing outer races into the gear carrier.
12. Measure the side bearing preload torque. If necessary, select the appropriate side bearing adjusting washers. Refer to RFD-
24, "Side Bearing Preload Torque" .
SDIA2593E
SDIA2594E
Tool number : KV10112100-A (BT-8653-A)
SDIA0247J
Tool number A: KV38100200 (J-26233)
B: ST33081000 ( — )
SPD353
SPD919

RFD-30
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
13. Insert the selected left and right side bearing adjusting washers
in place between the side bearings and gear carrier.
14. Install the side bearing caps with the matching marks aligned and tighten the side bearing cap bolts to the specified torque.
Refer to RFD-15, "
COMPONENTS" .
15. Check and adjust the drive gear runout, tooth contact, drive gear to drive pinion backlash, and total pre- load torque. Refer to RFD-17, "
Drive Gear Runout" , RFD-17, "Tooth Contact" , RFD-18, "Backlash" and
RFD-16, "
Total Preload Torque" .
Recheck the above items.
16. Install the side flanges. Refer to RFD-30, "
Side Flange" .
17. Apply a 3.2mm (0.126 in) bead of sealant to the mating surface of the carrier cover.

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.
18. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque. Refer to RFD-15, "
COMPONENTS" .
19. Install the side flange. Refer to RFD-30, "
Side Flange" .
Side Flange
1. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly until it becomes flush
with the gear carrier using 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.
SPD924
SPD889
WDIA0282E
Tool number : ST35271000 ( — )
SPD560

RFD-32
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: November 20092006 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
General SpecificationsEDS0044V
Inspection and AdjustmentEDS0044W
DRIVE GEAR RUNOUT
Unit: mm (in)
SIDE GEAR CLEARANCE
Unit: mm (in)
PRELOAD TORQUE
Unit: N·m (kg-m, in-lb)
BACKLASH
Unit: mm (in)
COMPANION FLANGE RUNOUT
Unit: mm (in)
SELECTIVE PARTS
Side Gear Thrust Washer
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information. Applied model
VK56DE
2WD 4WD
Final drive model R230
Gear ratio 2.9373.357
Number of teeth (Drive gear/Drive pinion) 47 / 1647 / 14
Oil capacity (Approx.) 1.75 (3 3/4 US pt, 3 1/8 Imp pt)
Number of pinion gears 2
Drive pinion adjustment spacer type Collapsible
ItemRunout limit
Drive gear back face 0.05 (0.0020) or less
ItemSpecification
Side gear back clearance
(Clearance limit between side gear and differential case for adjusting
side gear backlash) 0.20 (0.0079) or less
(Each gear should rotate smoothly without excessive resis- tance during differential motion.)
Item Specification
Drive pinion bearing preload torque 1.77 − 2.64 N·m (0.18 − 0.26 kg−m, 16 − 23 in-lb)
Side bearing preload torque (reference value determined by drive
gear bolt pulling force) 0.20
− 0.52 N·m (0.02 − 0.05 kg −m, 2 − 4 in-lb)
Drive gear bolt pulling force (by spring gauge) 34.2 − 39.2 N (3.5 − 4 kg, 7.7 − 8.8 lb)
Total preload torque
(Total preload torque = drive pinion bearing preload torque + Side
bearing preload torque) 2.05
− 4.11 N·m (0.21 − 0.42 kg −m, 19 − 36 in-lb)
Item Specification
Drive gear to drive pinion gear 0.13 − 0.18 (0.0051 − 0.0070)
Item Runout limit
Outer side of the companion flange 0.08 (0.0031) or less
ThicknessPart number*
1.75 (0.0688)
1.80 (0.0708)
1.85 (0.0728) 38424 7S000
38424 7S001
38424 7S002

RSU-48
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: November 20092006 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Wheel AlignmentEES001HT
Ball JointEES001HU
Camber
Degree minute (decimal degree)Minimum
0° 0 ′ (0 °)
Nominal - 0° 30 ′ (-0.5 °)
Maximum - 1° 0 ′ (-1.0 °)
Cross camber 0° 45′ (0.75 °)
Toe-in Distance (A - B)
Minimum
0 mm (0 in)
Nominal 3.3 mm (0.130 in)
Maximum 6.6 mm (0.260 in)
Cross toe 2 mm (0.079 in)
Angle (left, right)
Degree minute (decimal degree) Minimum
0° 0 ′ (0 °)
Nominal 0° 7 ′ (0.11 °)
Maximum 0° 14′ (0.22 °)
Cross toe 0° 8 ′ (0.14 °)
SFA234AC
Swinging force (measurement point: cotter pin hole of ball stud) “A ” 11.4 - 145.5 N (1.16 - 14.8 kg, 2.56 - 32.7 lb)
Turning torque “B ” 0.5 - 6.4 N·m (0.06 - 0.65 kg-m, 5 - 56 in-lb)
Vertical end play “C ” 0 mm (0 in)
SFA858A

PRECAUTIONSSE-3
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EIS004X5
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for WorkEIS004X6

When removing or disassembling each component, be careful not to damage or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.

When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the compo-
nent with a shop cloth or vinyl tape to protect it.

Protect the removed parts with a shop cloth and keep them.

Replace a deformed or damaged clip.

If a part is specified as a non-reusable part, always replace it with new one.

Be sure to tighten bolts and nuts securely to the specified torque.

After re-installation is completed, be sure to check that each part works normally.

Follow the steps below to clean components.
–Water soluble foul: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the
fouled area.
Then rub with a soft and dry cloth.
–Oily foul: Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%), and wipe
the fouled area.
Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub
with a soft and dry cloth.

Do not use organic solvent such as thinner, benzene, alcohol, or gasoline.

For genuine leather seats, use a genuine leather seat cleaner.

PRECAUTIONSTF-5
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Revision: November 2009 2006 QX56

When connecting or disconnecting pin connectors into or
from transfer control unit, take care not to damage pin ter-
minals (bend or break).
When connecting pin connectors make sure that there are
not any bends or breaks on transfer control unit pin termi-
nals.

Before replacing transfer control unit, perform transfer con-
trol unit input/output signal inspection and make sure
transfer control unit functions properly. Refer to TF-35,
"Transfer Control Unit Input/Output Signal Reference Val-
ues" .
Service NoticeEDS002H6

After overhaul refill the transfer with new transfer fluid.

Check the fluid level or replace the fluid only with the vehicle parked on level ground.

During removal or installation, keep inside of transfer clear of dust or dirt.

Disassembly should be done in a clean work area.

Before proceeding with disassembly, thoroughly clean the transfer. It is important to prevent the internal
parts from becoming contaminated by dirt or other foreign matter.

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

All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.

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

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

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

Observe the specified torque when assembling.

Clean and flush the parts sufficiently and blow-dry them.

Be careful not to damage sliding surfaces and mating surfaces.

Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transfer.
SEF291H
MEF040DB

ALL-MODE 4WD SYSTEMTF-17
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Transfer Motor Relay Operation
*: After 2.5 seconds have elapsed.

4WD shift switch, PNP switch, Neutral-4LO switch, vehicle speed sensor and throttle position sensor are
used in conjunction with the transfer motor.
WAIT DETECTION SWITCH

The wait detection switch operates when there is “circulating” torque produced in the propeller shaft
(L → H) or when there is a phase difference between 2-4 sleeve and clutch drum (H →L). After the release
of the “circulating ” torque, the wait detection switch helps provide the 4WD lock gear (clutch drum) shifts.
A difference may occur between the operation of the 4WD shift switch and actual drive mode. At this
point, the wait detection switch senses an actual drive mode.

The wait detection switch operates as follows.
–4WD lock gear (clutch drum) locked: ON
–4WD lock gear (clutch drum) released: OFF

The wait detection switch senses an actual drive mode and the 4WD shift indicator lamp indicates the
vehicle drive mode.
NEUTRAL-4LO SWITCH
The neutral-4LO switch detects that transfer gear is in neutral or 4LO (or shifting from neutral to 4LO) condi-
tion by L-H shift fork position.
AT P S W I T C H
ATP switch detects if transfer gear is in a neutral condition by L-H shift fork position.
NOTE:
Transfer gear may be in a neutral condition in 4H-4LO.
2-4WD SHIFT SOLENOID VALVE
The 2-4WD shift solenoid valve operates to apply oil pressure to the wet-multiplate clutch, depending on the
drive mode. The driving force is transmitted to the front wheels through the clutch so the vehicle is set in the
4WD shift switch A/T selector lever position Vehicle speed
(VSS) Accelerator pedal position Motor relay drive
command
2WD ——— OFF
4H (LOCK) and 4LO “
N ” position 0— ON
“ P ” position 00 - 0.07/8
OFF*
0.07/8 - 1/8 HOLD
1/8 - MAX ON
Other than “ R” position 0 < VSS
≤ 50 km/h (31 MPH)
— ON
50 km/h (31 MPH) < VSS < 55 km/h (34 MPH) HOLD
55 km/h (34 MPH) ≤ VSS OFF
“ R ” position —— ON
“ R ” position —— ON
AUTO “
P ” or “ N” position 0
0 - 0.07/8
OFF*
0.07/8 - 1/8 HOLD
1/8 - MAX ON
0 < VSS ≤ 50 km/h (31 MPH)
— ON
50 km/h (31 MPH) < VSS < 55 km/h (34 MPH) HOLD
55 km/h (34 MPH) ≤ VSS OFF
Other than “ R”, "P" and "N"
position 0 < VSS
≤ 50 km/h (31 MPH)
— ON
50 km/h (31 MPH) < VSS < 55 km/h (34 MPH) HOLD
55 km/h (34 MPH) ≤ VSS OFF