2009 INFINITI QX56 differential

FRONT FINAL DRIVEDLN-229
< DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: M205]
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4. Install the selected drive pinion height adjusting washer to the drive pinion. Press the drive pinion rear bearing inner race to it
using Tool.
CAUTION:
Do not reuse drive pinion rear bearing inner race.
5. Install the collapsible spacer to the drive pinion. CAUTION:
Do not reuse collapsible spacer.
6. Apply differential gear oil to the drive pinion rear bearing, and install the drive pinion assembly to the gear carrier.
7. Apply differential gear oil to the drive pinion front bearing, and install the drive pinion front bearing inner race to the drive pinion
assembly.
CAUTION:
Do not reuse drive pinion front bearing inner race.
8. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly using Tools.
CAUTION:
 Do not reuse front oil seal.
 Do not incline the new fron t oil seal when installing.
 Apply multi-purpose grease to th e lips of the new front oil
seal.
9. Install the companion flange to the drive pinion while aligning the matching marks. Tap the companion flange until fully seated
using suitable tool.Tool number : — (C-4040)
SDIA2253E
PDIA0708E
Tool number A: KV38100500 (J-25273)
B: KV38102200 ( — )
PDIA0717E
SDIA2266E
Revision: December 20092009 QX56

DLN-230
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
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 suitable 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 th e 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 DLN-217, "Disassembly and
Assembly".
 If the drive pinion bearing preload torque exceeds the specified value, replace collap sible spacer and tighten it
again to adjust. Do not lo osen drive pinion lock nut to
adjust the drive pinion bearing preload torque.
 After adjustment, rotate drive pinion back and fo rth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
11. Check companion flange runout.
12. Install the differential case assembly.
Differential Assembly
1. Install side gear thrust washers with the same thickness as the ones installed prior to disassembly, or reinstall the old ones on
the side gears.
2. Install the side gears and side gear thrust washers into the dif- ferential case.
3. Install the pinion mate thrust washers to the two pinion mate gears. Then install the pinion mate gears with the pinion mate
thrust washers by aligning them in diagonally opposite positions
and rotating them into the differential case.Tool number B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque
: Refer to DLN-234, "Inspection and Adjust-
ment"
WDIA0382E
SDIA0193J
SDIA2025E
Revision: December 20092009 QX56

FRONT FINAL DRIVEDLN-231
< DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: M205]
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4. Install the pinion mate shaft and align the lock pin hole on the pinion mate shaft with the lock pin hole on the differential case.
5. Measure the side gear end play. If necessary, select the appro- priate side gear thrust washers. Refer to DLN-234, "Inspection
and Adjustment".
6. Drive a new lock pin into the pinion mate shaft until it is flush with the differential case using suitable tool.
CAUTION:
Do not reuse lock pin.
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. Install and tighten the new drive gear bolts to the specified torque. Refer to DLN-217, "Disassembly and Assembly"
.
CAUTION:
 Make sure the drive gear back and threaded holes are
clean.
 Do not reuse drive gear bolts.
 Tighten new drive gear bolts in a crisscross pattern.
9. Press the new side bearing inner races to the differential case using Tools.
CAUTION:
Do not reuse side bearing inner races.
SDIA0195J
SPD030
SDIA2593E
SDIA2239E
Tool number A: KV38100300 (J-25523)
B: ST33081000 ( — )
SPD353
Revision: December 20092009 QX56

DLN-232
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
10. Install side bearing adjusters into gear carrier.
11. 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 ou ter race when replacing side
bearing inner race (replace as a set).
12. Install the side bearing caps with the matching marks aligned. NOTE:
Do not tighten at this step. This allows further tightening of side
bearing adjusters.
13. Tighten each side bearing adjuster alternately turning drive gear.
14. Check and adjust tooth contact, backlash, drive gear runout and total preload torque.
Recheck above items.
 After adjusting tooth contact and backlash secure side bearing
adjuster with screws and tighten side bearing cap bolt to the
specified torque. Refer to DLN-217, "Disassembly and Assem-
bly".
15. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly to
the gear carrier using suitable 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.
SPD527
PDIA0700E
SDIA2265E
SDIA2263E
Revision: December 20092009 QX56

DLN-234
< SERVICE DATA AND SPECIFICATIONS (SDS) [FRONT FINAL DRIVE: M205]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
General SpecificationINFOID:0000000004193547
Inspection and AdjustmentINFOID:0000000004193548
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
Drive Pinion Height Adjusting Washer
Applied model4WD
VK56DE
A/T
Final drive model M205
Gear ratio 3.357
Number of teeth (Drive gear/Drive pinion) 47/14
Differential gear oil capacity (Approx.) 1.6 (3 3/8 US pt, 2 7/8 Imp pt)
Number of pinion gears 2
Drive pinion adjustment spacer type Collapsible
Item Limit
Drive gear back face 0.08 (0.0031) or less
Item Standard
Side gear back clearance (Clearance between side gear and dif-
ferential case for adjusting side gear backlash) 0.20 (0.0079) or less
(Each gear should rotate smoothly without excessive resistance during differential motion.)
Item Standard
Drive pinion bearing preload torque 2.3 - 3.4 (0.24 - 0.34, 21 - 30)
Total preload torque
(Total preload torque = drive pinion bearing preload torque + side
bearing preload torque). 2.98 - 4.76 (0.31 - 0.48, 27 - 42)
Item Standard
Drive gear to drive pinion backlash 0.12 - 0.20 (0.0050 - 0.0078)
Item Limit
Companion flange face 0.10 (0.0039) or less
Companion flange inner side 0.13 (0.0051) or less
Revision: December 20092009 QX56

PRECAUTIONSDLN-237
< PRECAUTION > [REAR FINAL DRIVE: R230]
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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.
Precaution for Servicing Rear Final DriveINFOID:0000000004193549
 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 fr om 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 t he 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 jell y, or multi-purpose grease, as specified.
Revision: December 20092009 QX56

DLN-238
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005877759
The actual shapes of Kent-Moore tool
s may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
HT72400000
(—)
Slide hammer Removing differential case assembly
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing carrier cover
KV10112100
(BT-8653-A)
Angle wrench Tightening bolts for drive gear
KV38100200
(J-26233)
Drift Installing side oil seal
a: 65 mm (2.56 in) dia.
b: 49 mm (1.93 in) dia.
KV38100800
(J-25604-01)
Attachment Securing unit assembly
a: 541 mm (21.30 in)
b: 200 mm (7.87 in)
KV381054S0
(J-34286)
Puller Removing front oil seal
S-NT125
S-NT046
NT014
ZZA1143D
SDIA0267E
ZZA0601D
Revision: December 20092009 QX56

DLN-240
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
Commercial Service Tool
INFOID:0000000004193551
ST3127S000
(J-25765-A)
Preload gauge
1: GG91030000 (J-25765)
Torque wrench
2: HT62940000 (—)
Socket adapter (1/2 ″)
3: HT62900000 (—)
Socket adapter (3/8 ″) Measuring drive pinion bearing preload torque
and total preload torque
ST3306S001
(—)
Differential side bearing puller set
1: ST33051001 (J-22888-20)
Puller
2: ST33061000
(J-8107-2)
Base Removing and installing side bearing inner
race
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia.
ST33081000
(—)
Adapter Install differential carrier side bearings
a: 43 mm (1.69 in) dia.
b: 33.5 mm (1.319 in) dia.
ST35325000
(—)
Drift bar Installing drive pinion front and rear bearing
races
ST36230000
(J-25840-A)
Sliding hammer Removing side flange
—
(J-8129)
Spring gauge Measuring turning torque
Tool number
(Kent-Moore No.)
Tool name
Description
NT124
NT072
NT431
ZZA1140D
ZZA0803D
NT127
Revision: December 20092009 QX56