2006 INFINITI QX56 differential

CARRIER COVERFFD-11
CE F
G H
I
J
K L
M A
B
FFD
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

FFD-12
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
FRONT FINAL DRIVE ASSEMBLYPFP:38500
Removal and InstallationEDS00456
REMOVAL
1. Drain the differential gear oil. Refer to FFD-7, "DIFFERENTIAL GEAR OIL" .
2. Remove the drive shafts from the front final drive assembly. Refer to FA X - 7 , "
Removal and Installation" .
3. Remove the front cross member.
4. Remove the front propeller shaft from the front final drive assembly. Refer to PR-4, "
Removal and Installa-
tion" .
5. Disconnect the vent hose from the front final drive assembly.
6. Support the front final drive assembly using a suitable jack.
1. Front final drive assembly 2. Front cross member 3. Skid plate (if equipped)
SDIA3220E

FRONT FINAL DRIVE ASSEMBLYFFD-13
CE F
G H
I
J
K L
M A
B
FFD
Revision: November 2009 2006 QX56
7. Remove the front final drive assembly bolts, then remove the
front final drive assembly.
CAUTION:
Support the front final drive assembly while removing using
a suitable jack.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

Make sure there are no pinched or restricted areas on the breather hose caused by folding or
bending when installing it.

Fill the front final drive assembly with differential gear oil after installation. Refer to FFD-7, "DIF-
FERENTIAL GEAR OIL" .
BDIA0008E

FFD-14
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
Disassembly and AssemblyEDS00457
COMPONENTS
1. Side bearing adjuster2. Side bearing 3. Side gear thrust washer
4. Side gear 5. Lock pin 6. Pinion mate thrust washer
7. Pinion mate gear 8. Pinion mate shaft 9. Drive pinion
10. Drive pinion height adjusting washer 11. Drive pinion rear bearing 12. Collapsible spacer
13. Breather tube 14. Differential side flange 15. Dust shield
16. Circular clip 17. Side oil seal 18. Drive pinion front bearing
19. Front oil seal 20. Companion flange 21. Drive pinion lock nut
22. Drain plug 23. Differential side shaft 24. Differential side shaft bearing
25. Extension tube 26. O-ring 27. Gear carrier
28. Plate 29. Differential case 30. Drive gear
31. Side bearing cap 32. Filler plug 33. Carrier cover
SDIA3207E

FRONT FINAL DRIVE ASSEMBLYFFD-15
CE F
G H
I
J
K L
M A
B
FFD
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

FFD-18
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
DISASSEMBLY
Differential Assembly
1. Drain the differential gear oil if necessary.
2. Remove the differential side shaft and differential side flange
using suitable tool.
3. Remove the extension tube and O-ring from the gear carrier.
4. Place a small hole in the side oil seal case using suitable tool.
5. Remove the side oil seal using Tool as shown.
BDIA0006E
SDIA3205E
LDIA0129E
Tool number : SP8P
LDIA0130E

FRONT FINAL DRIVE ASSEMBLYFFD-19
CE F
G H
I
J
K L
M A
B
FFD
Revision: November 2009 2006 QX56
6. 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.
7. For proper reinstallation, paint matching marks on one side of the side bearing cap and gear carrier.
CAUTION:

For matching marks, use paint. Do not damage side bear-
ing cap or gear carrier.

Side bearing caps are line-board during manufacture.
The matching marks are used to reinstall them in their
original positions.
8. Remove the side bearing caps.
9. Remove the side bearing adjuster.
10. Lift the differential case assembly out of the gear carrier. CAUTION:
Keep side bearing outer races together with side bearing
inner races. Do not mix them up.Tool number : KV10111100 (J-37228)
PDIA0699E
PDIA0700E
PDIA0701E
SDIA2230E
SPD527

FFD-20
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
11. Remove side bearing inner race using Tools as shown.
CAUTION:

Do not remove side bearing inner race unless it is being
replaced.

Place copper plates between the vise and the side bear-
ing inner race and drive gear to prevent damage.

Engage puller jaws in groove to prevent damage to bear-
ing.

Keep side bearing outer races together with side bearing
inner races. Do not mix them up.
12. For proper reinstallation, paint matching marks on the differential case and drive gear.
CAUTION:
Use paint for matching marks. Do not damage differential
case or drive gear.
13. Remove the drive gear bolts.
14. Tap the drive gear off the differential case using suitable tool. CAUTION:
Tap evenly all around to keep drive gear from bending.
15. Remove the lock pin of the pinion mate shaft from the drive gear side using suitable tool.
16. Remove the pinion mate shaft. Tool number A: ST33081000 ( — )
B: ST30021000 ( — )
SDIA2237E
SPD022
PDIA0496E
SPD025
SDIA0031J