2009 INFINITI QX56 200

DLN-212
< ON-VEHICLE REPAIR >[FRONT FINAL DRIVE: M205]
FRONT OIL SEAL
8. Remove the front oil seal using Tool as shown.
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 fron t 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 suitable 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 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".
 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 sp ecifications, replace the collapsible spacer and
tighten it again to adjust. Refer to DLN-217, "Disassembly and Assembly"
.
 After adjustment, rotate drive pinion back and fo rth 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:Tool number : SP8P
LDIA0130E
Tool number : KV38100500 (J-25273)
: KV38102200 ( — )
BDIA0003E
Tool number B: ST3127S000 (J-25765-A)
Total preload torque: Refer to DLN-234, "General
Specification".
WDIA0381E
Revision: December 20092009 QX56

FRONT OIL SEALDLN-213
< ON-VEHICLE REPAIR > [FRONT FINAL DRIVE: M205]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
Check the differential gear oil l evel after installation. Refer to DLN-209, "Checking Differential Gear
Oil".
Revision: December 20092009 QX56

DLN-214
< ON-VEHICLE REPAIR >[FRONT FINAL DRIVE: M205]
CARRIER COVER
CARRIER COVER
Removal and InstallationINFOID:0000000004193544
REMOVAL
1. Remove the front final drive assembly. Refer to
DLN-215, "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 screwdr iver, 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-15,
"Recommended Chemical Products and Sealants".
CAUTION:
Remove any old sealant adheri ng 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 DLN-217, "Disassembly and
Assembly".
3. Install the front final drive assembly. Refer to DLN-215,
"Removal and Installation".
CAUTION:
Fill the front final drive assembly with r ecommended differential gear oil. Refer to DLN-209,
"Checking Differential Gear Oil".
Tool number : KV10111100 (J-37228)
PDIA0699E
SDIA3204E
Revision: December 20092009 QX56

FRONT FINAL DRIVEDLN-215
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: M205]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
REMOVAL AND INSTALLATION
FRONT FINAL DRIVE
Removal and InstallationINFOID:0000000004193545
REMOVAL
1. Drain the differential gear oil. Refer to DLN-209, "Changing Differential Gear Oil".
2. Remove the drive shafts from the front final drive assembly. Refer to FAX-9, "Removal and Installation"
.
3. Remove the front cross member.
4. Remove the front propeller shaft from the front final drive assembly. Refer to DLN-186, "Removal and
Installation".
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. Undercover
SDIA3220E
Revision: December 20092009 QX56

DLN-216
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
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 ar eas on the breather hose caused by folding or bend-
ing when installing it.
 Fill the front final drive assembly with differen tial gear oil after installation. Refer to DLN-209,
"Checking Differential Gear Oil".
BDIA0008E
Revision: December 20092009 QX56

FRONT FINAL DRIVEDLN-217
< DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: M205]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DISASSEMBLY AND ASSEMBLY
FRONT FINAL DRIVE
Disassembly and AssemblyINFOID:0000000005875038
COMPONENTS
1. Side bearing adjuster 2. 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
AWDIA0707GB
Revision: December 20092009 QX56

DLN-218
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
ASSEMBLY INSPECTION AND ADJUSTMENT
 Drain the differential gear oil before inspection and adjustment. Refer to
DLN-209, "Changing Differential
Gear Oil".
 Remove and install the carrier cover as neces sary for inspection and adjustment. Refer to DLN-214,
"Removal and Installation".
Total Preload Torque
1. Install the differential side shaft and differential side flange if necessary.
CAUTION:
The differential side shaft and differential side flan ge 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
28. Plate 29. Differential case 30. Drive gear
31. Side bearing cap 32. Filler plug 33. Carrier cover
34. Bushing 35. Bearing 36 Screw
37 Dowel pin
Tool number : ST3127S000 (J-25765-A)
Total preload torque
: Refer to DLN-234, "Inspection and Adjust-
ment"
PDIA0697E
If the total preload torque is greater than specification
On drive pinion bearings: R eplace the collapsible spacer.
On side bearings: Loosen the side bearin g 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 bear ing adjuster by the same amount on each
side.
Runout limit: 0.08 mm (0.0031 in) or less
SPD886
Revision: December 20092009 QX56

FRONT FINAL DRIVEDLN-219
< DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: M205]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
1. Apply red lead to the drive gear. NOTE:
Apply red lead to both faces of thr ee to four gears, at four loca-
tions evenly spaced on the drive gear.
2. Rotate the drive gear back and forth several times. Then check for correct drive pinion to drive gear tooth contact as shown.
CAUTION:
Check tooth contact on dri ve side and reverse side.
3. If the tooth contact is improper ly adjusted, follow the procedure
below to adjust the drive pinion height (dimension X).
 If the tooth contact is near the face (face contact), or near the heel (heel contact), use a thicker drive pinion height adjusting washer to
move drive pinion closer to the drive gear.
Refer to DLN-234, "Inspection and Adjustment"
.
 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 DLN-234, "Inspection and Adjustment"
.
SPD357
SDIA0570E
SDIA0517E
PDIA0440E
PDIA0441E
Revision: December 20092009 QX56