2006 INFINITI QX56 torque

FFD-4
PREPARATION
Revision: November 20092006 QX56
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 wrench Removing 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)
Installer Installing drive pinion rear bearing inner race.
KV40105230
(—)
Drift Installing drive pinion rear bearing outer race.
a: 92 mm (3.62 in) dia.
b: 85.5 mm (3.37 in) dia.
—
(C-4171)
Handle

Removing drive pinion front bearing outer
race

Removing drive pinion rear bearing outer
race
Tool number
(Kent-Moore No.)
Tool name
Description
ZZA1000D
NT771
NT124
SDIA2607E
ZZA0898D
LDIA0134E

DIFFERENTIAL GEAR OILFFD-7
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Revision: November 2009 2006 QX56
DIFFERENTIAL GEAR OILPFP:KLD30
Changing Differential Gear OilEDS00451
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-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to GI-46, "Recommended Chemical Prod-
ucts and Sealants" .
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-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
Checking Differential Gear OilEDS00452
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-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
Differential gear oil
grade and capacity
: Refer to
MA-11, "
Fluids
and Lubricants" .
LDIA0176E
LDIA0176E

FFD-8
FRONT OIL SEAL
Revision: November 20092006 QX56
FRONT OIL SEALPFP:38189
Removal and InstallationEDS00453
REMOVAL
1. Remove the drive shafts from the front final drive assembly. Refer to FA X - 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-15, "
Total Preload Torque" .
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 SEALFFD-9
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Revision: November 2009 2006 QX56
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
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 FFD-14, "
COMPONENTS" .

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-14, "
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, "
DIFFERENTIAL GEAR OIL" .
Tool number : KV38100500 (J-25273)
BDIA0003E
Tool number A: KV38108300 ( — )
B: ST3127S000 (J-25765-A)
Total preload torque: Refer to FFD-15, "
To ta l P r e -
load Torque" .
WDIA0381E

CARRIER COVERFFD-11
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Revision: November 2009 2006 QX56
CARRIER COVERPFP:38351
Removal and InstallationEDS00455
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 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 FFD-14, "
COMPONENTS" .
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, "
DIFFER-
ENTIAL GEAR OIL" .
Tool number : KV10111100 (J-37228)
PDIA0699E
SDIA3204E

FRONT FINAL DRIVE ASSEMBLYFFD-15
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Revision: November 2009 2006 QX56
ASSEMBLY INSPECTION AND ADJUSTMENT

Drain the differential gear oil before inspection and adjustment. Refer to FFD-7, "DIFFERENTIAL GEAR
OIL" .

Remove and install the carrier cover as necessary for inspection and adjustment. Refer to FFD-11, "CAR-
RIER COVER" .
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.
34. Bushing 35. Bearing36 Screw
37 Dowel pin
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 specificationOn 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 ASSEMBLYFFD-17
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Revision: November 2009 2006 QX56

If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), use a thinner drive pinion height adjusting
washer to move the drive pinion farther from the drive gear.
Refer to FFD-32, "
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, 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.
PDIA0441E
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 ASSEMBLYFFD-27
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Revision: November 2009 2006 QX56
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 FFD-14, "
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 FFD-17, "
Companion Flange Runout" .
12. Install the differential case assembly. Refer to FFD-27, "
Differential 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