torque INFINITI QX56 2007 Factory Service Manual

FFD-4
< SERVICE INFORMATION >
PREPARATION
KV38102200
(—)
DriftInstalling front oil seal.
a: 90 mm (3.54 in) dia.
b: 55.3 mm (2.18 in) dia.
ST33081000
(—)
AdapterRemoving and installing side bearing inner
race.
a: 43 mm (1.69 in) dia.
b: 33.5 mm (1.32 in) dia.
KV38108300
(J-44195)
Companion flange wrenchRemoving and installing drive pinion nut.
ST3127S000
(J-25765-A)
Preload gauge
1. GG91030000
(J-25765)
Torque wrench
2. HT62940000
( — )
Socket adapter (1/2″)
3. HT62900000
( — )
Socket adapter (3/8″)Inspecting drive pinion bearing preload and
total preload
—
(C-4040)
InstallerInstalling drive pinion rear bearing inner race.
KV40105230
(—)
DriftInstalling drive pinion rear bearing outer race.
a: 92 mm (3.62 in) dia.
b: 85.5 mm (3.37 in) dia. Tool number
(Kent-Moore No.)
Tool nameDescription
NT660
ZZA1000D
NT771
NT124
SDIA2607E
ZZA0898D

DIFFERENTIAL GEAR OIL
FFD-7
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P
DIFFERENTIAL GEAR OIL
Changing Differential Gear OilINFOID:0000000003532588
DRAINING
1. Stop the engine.
2. Remove the drain plug from the front final drive assembly to drain the differential gear oil.
3. Install the drain plug with sealant applied on the threads to the front final drive assembly. Tighten to the
specified torque. Refer to FFD-13, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-45, "
Recommended Chemical Product
and Sealant".
FILLING
1. Remove the filler plug from the front final drive assembly.
2. Fill the front 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 sealant applied on the threads to the
front final drive assembly. Tighten to the specified torque. Refer
to FFD-13, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Product and Sealant".
Checking Differential Gear OilINFOID:0000000003532589
DIFFERENTIAL GEAR OIL LEAKAGE AND LEVEL
1. Make sure that differential gear oil is not leaking from the front 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 sealant applied on the threads to the
front final drive assembly. Tighten to the specified torque. Refer
to FFD-13, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Product and Sealant". Differential gear oil
grade and capacity: Refer to MA-10, "
Fluids
and Lubricants".
LDIA0176E
LDIA0176E

FFD-8
< SERVICE INFORMATION >
FRONT OIL SEAL
FRONT OIL SEAL
Removal and InstallationINFOID:0000000003532590
REMOVAL
1. Remove the drive shafts from the front final drive assembly. Refer to FAX-7, "Removal and Installation".
2. Remove the front propeller shaft from the front final drive assembly. Refer to PR-4, "
Removal and Installa-
tion".
3. Measure the total preload torque. Refer to FFD-13, "
Disassembly and Assembly".
NOTE:
Record the total preload torque measurement.
4. Remove the drive pinion lock nut using Tool.
5. 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.
6. Remove companion flange using suitable tool.
7. Place a small hole in the front oil seal case using suitable tool.
8. Remove the front oil seal using Tool as shown.Tool number : KV38108300 ( — )
BDIA0001E
LDIA0171E
LDIA0129E
Tool number : SP8P
LDIA0130E

FRONT OIL SEAL
FFD-9
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P
INSTALLATION
1. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly to 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.
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 pre-
load 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 FFD-13, "
Disassembly and Assembly".
• Do not loosen drive pinion lock nut to adjust the total preload torque. If the drive pinion lock nut
torque or the total preload torque exceeds the specifications, replace the collapsible spacer and
tighten it again to adjust. Refer to FFD-13, "
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 FFD-7
. Tool number : KV38100500 (J-25273)
BDIA0003E
Tool number A: KV38108300 ( — )
B: ST3127S000 (J-25765-A)
Total preload torque: Refer to FFD-13, "
Disassem-
bly and Assembly".
WDIA0381E

CARRIER COVER
FFD-11
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P
CARRIER COVER
Removal and InstallationINFOID:0000000003532592
REMOVAL
1. Remove the front final drive assembly. Refer to FFD-12, "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 3 mm (0.12 in) bead of sealant to the mating surface of
the carrier cover as shown.
• Use Genuine Silicone RTV or equivalent. Refer to GI-45,
"Recommended Chemical Product and Sealant".
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 FFD-13, "
Disassembly and
Assembly".
3. Install the front final drive assembly. Refer to FFD-12, "
Removal
and Installation".
CAUTION:
Fill the front final drive assembly with recommended differential gear oil. Refer to FFD-7
. Tool number : KV10111100 (J-37228)
PDIA0699E
SDIA3204E

FRONT FINAL DRIVE ASSEMBLY
FFD-15
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P Total Preload Torque
1. Install the differential side shaft and differential side flange if necessary.
CAUTION:
The differential side shaft and differential side flange must be installed 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 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.
Drive Gear Runout
1. Fit a dial indicator to the drive gear back face.
2. Rotate the drive gear to measure runout.
• If the runout is outside of the limit, check the condition of the drive
gear assembly. Foreign material may be caught between the drive
gear and differential case, or the differential case or drive gear may
be deformed.
CAUTION:
Replace drive gear and drive pinion as a set.
Tooth Contact
Tool number : ST3127S000 (J-25765-A)
Total preload torque:
2.98 - 4.76 N·m (0.31 - 0.48 kg-m, 27 - 42 in-lb)
PDIA0697E
If the total preload torque is greater than specification
On drive pinion bearings: Replace the collapsible spacer.
On side bearings: Loosen the side bearing adjuster by the same amount on each
side.
If the total preload torque is less than specification
On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Tighten the side bearing adjuster by the same amount on each
side.
Runout limit: 0.08 mm (0.0031 in) or less
SPD886

FRONT FINAL DRIVE ASSEMBLY
FFD-17
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P Backlash
1. Fit a dial indicator to the drive gear face to measure the back-
lash.
• If the backlash is outside of the specification, adjust each side
bearing adjuster.
CAUTION:
Do not change the side bearing adjusters by different
amounts as it will change the side bearing preload torque.
Companion Flange Runout
1. Rotate companion flange and check for runout on the compan-
ion flange face (inner side of the bolt holes) and companion
flange inner side (socket diameter) using suitable tool.
2. If the runout is outside 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 pin-
ion, possible cause could be an assembly malfunction of drive pinion and drive pinion bearing or a mal-
functioning drive pinion bearing.
c. If the runout is still outside of the runout limit after repair of the assembly of drive pinion and drive pinion
bearing or drive pinion bearing, replace the companion flange.
DISASSEMBLY
Differential Assembly
1. Drain the differential gear oil if necessary.Backlash: 0.12 - 0.20 mm (0.0050 - 0.0079 in)
SPD513
If the backlash is greater than specification:
Loosen side bearing adjuster A and tighten side bear-
ing adjuster B by the same amount.
If the backlash is less than specification:
Loosen side bearing adjuster B and tighten side bear-
ing adjuster A by the same amount.
SDIA2262E
Runout limit
Companion flange face: 0.10 mm (0.0039 in)
Companion flange inner side: 0.13 mm (0.0051 in)
SDIA2078E

FRONT FINAL DRIVE ASSEMBLY
FFD-27
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P
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.
• 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.
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 A: KV38108300 (J-44195)
B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque:
2.3 - 3.4 N·m (24 - 34 kg-cm, 21 - 30 in-lb)
WDIA0382E
SDIA0193J
SDIA2025E

FFD-28
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
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.
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.
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

FRONT FINAL DRIVE ASSEMBLY
FFD-29
< SERVICE INFORMATION >
C
E
F
G
H
I
J
K
L
MA
B
FFD
N
O
P
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 outer 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.
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