2011 INFINITI QX56 oil

DLN-212
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DIFFERENTIAL ASSEMBLY
5. Install bearing caps in their correct locations and tighten bearing
cap mounting bolts.
6. Turn the carrier several times to seat the bearings.
7. Measure the turning torque of the carrier at the drive gear mounting bolts with a spring gauge [SST: — (J-8129)].
8. If the turning torque is outside the specification, use a thicker/ thinner side bearing adjusting washer to adjust. For selecting
adjusting washer, refer to the latest parts information.
CAUTION:
Select a side bearing adjust ing washer for right and left
individually.
9. Record the total amount of washer thickness required for the correct carrier side bearing preload.
DRIVE GEAR RUNOUT
1. Remove rear cover. Refer to DLN-204, "Disassembly".
2. Fit a dial indicator to the drive gear back face.
3. Rotate the drive gear to measure runout.
 If the runout is outside of the repair limit, check drive gearassembly condition; foreign material may be caught between
drive gear and differential case, or differential case or drive
gear may be deformed, etc.
CAUTION:
Replace drive gear and dri ve pinion gear as a set.
TOOTH CONTACT
Before inspection and adjustment, drain gear oil.
1. Remove rear cover. Refer to DLN-204, "
Disassembly".
SDIA1795E
Specification : 34.2 – 39.2N (3.5 – 4.0 kg,
7.7 – 8.8 lb) of pulling force
at the drive gear bolt
SPD194A
If the turning torque is less
than the specified range:Use a thicker thrust wash-
er.
If the turning torque is
greater than the specifica-
tion: Use a thinner thrust wash-
er.
SPD772
Drive gear runout : Refer to
DLN-222, "Drive
Gear Runout".
SPD886
Revision: 2010 May2011 QX56

DLN-214
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DIFFERENTIAL ASSEMBLY
4. If tooth contact is improperly adjusted, follow the procedure
below to adjust the pinion height [dimension (X)].
 If the tooth contact is near the face (face contact), or near theheel (heel contact), thicken pinion height adjusting washers to
move drive pinion closer to drive gear.
For selecting adjusting washer, refer to the latest parts infor-
mation.
 If the tooth contact is near the flank (flank contact), or near the toe (toe contact), thin pinion height adjusting washers to move
drive pinion farther from drive gear.
For selecting adjusting washer, refer to the latest parts infor-
mation.
BACKLASH
Before inspection and adjustment, drain gear oil.
1. Remove rear cover. Refer to DLN-204, "
Disassembly".
2. Fit a dial indicator to the drive gear face to measure the back- lash.
 If the backlash is outside of the specified value, change thethickness of side bearing adjusting washer.
SDIA0517E
PDIA0440E
PDIA0441E
Backlash : Refer to DLN-222, "Back-
lash".
When the backlash is large: Make drive gear back side adjusting washer thicker,
and drive gear tooth side adjusting washer thinner by
the same amount. For selectin g adjusting washer, re-
fer to the latest parts information.
SPD513
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-215
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
CAUTION:
Never change the total amount of wash ers as it changes the bearing preload.
InspectionINFOID:0000000006222424
INSPECTION AFTER DISASSEMBLY
Drive Gear and Drive Pinion
 Clean up the disassembled parts.
 If the gear teeth never mesh or line-up correctly, det ermine the cause and adjust or replace as necessary.
 If the gears are worn, cracked, damaged, pitted or chi pped (by friction) noticeably, replace with new drive
gear and drive pinion as a set.
Bearing
 Clean up the disassembled parts.
 If any chipped (by friction), pitted, worn, rusted or scratched marks, or unusual noise from the bearing is
observed, replace as a bearing assembly (as a new set).
Side Gear and Pinion Mate Gear
 Clean up the disassembled parts.
 If any cracks or damage on the surfac e of the tooth is found, replace.
 If any worn or chipped mark on the contact si des of the thrust washer is found, replace.
Side Gear Thrust Washer and Pinion Mate Thrust Washer
 Clean up the disassembled parts.
 If it is chipped (by friction), damaged, or unusually worn, replace.
Oil Seal
 Whenever disassembled, replace.
 If wear, deterioration of adherence (sealing force lips ), or damage is detected on the lips, replace them.
Differential case
 Clean up the disassembled parts.
 If any wear or crack on the contact sides of the differential case is found, replace.
When the backlash is small:
Make drive gear back side adjusting washer thinner,
and drive gear tooth side ad justing washer thicker by
the same amount. For selecting adjusting washer, re-
fer to the latest parts information.
Revision: 2010 May2011 QX56

DLN-216
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DRIVE PINION
DRIVE PINION
Exploded ViewINFOID:0000000006222425
1. Rear cover 2. Bearing cap 3. Side gear thrust washer
4. Side gear 5. Pinion mate thrust washer 6. Pinion mate gear
7. Pinion mate shaft 8. Lock pin 9. Side bearing
10. Side bearing adjusting washer 11. Drive pinion 12. Pinion height adjusting washer
13. Pinion rear bearing 14. Collapsible spacer 15. Side flange
16. Circlip 17. Side oil seal 18. Gear carrier
19. Pinion front bearing 20. Front oil seal 21. Companion flange
22. Drive pinion lock nut 23. Drive gear 24. Differential case
25. Gasket 26. Drain plug 27. Filler plug
A. Oil seal lip B. Screw hole C. Comply with the assembly proce-
dure when tightening. Refer to DLN-
206, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
: Apply Genuine Silicone RTV or equivalent. Refer to GI-22, "
Recommended Chemical Products and Sealants".
JPDID0397GB
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-217
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DisassemblyINFOID:0000000006222426
1. Remove differential case assembly. Refer to DLN-204, "Disassembly".
2. Remove drive pinion lock nut with the flange wrench (commer- cial service tool).
3. Put matching mark (B) on the end of drive pinion. The matching mark should be in line with the matching mark (A) on companion
flange (1).
CAUTION:
For matching mark, use pain t. Never damage companion
flange and drive pinion.
NOTE:
The matching mark on the final drive companion flange indicates
the maximum vertical runout position.
When replacing companion flange, matching mark is not neces-
sary.
4. Remove companion flange using the suitable puller (commercial service tool).
5. Press drive pinion assembly out of gear carrier. CAUTION:
Never drop drive pinion assembly.
6. Remove front oil seal.
7. Remove side oil seal.
8. Remove pinion front bearing inner race.
9. Remove collapsible spacer.
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to GI-22, "Recommended Chemical Products
and Sealants".
Refer to GI-4, "
Components" for symbols not described above.
JSDIA0046ZZ
JSDIA0038ZZ
SDIA1132E
PDIA0760J
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-219
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
3. Install selected drive pinion height adjusting washer (2) to drive pinion. Press pinion rear bearing inner race (1) to it, using drift
(A) [SST: ST30022000 ( — )].
CAUTION:
 Be careful of the direction of pinion height adjusting
washer. (Assemble as shown in the figure.)
 Never reuse pinion rear bearing inner race.
4. Assemble collapsible spacer to drive pinion. CAUTION:
Never reuse collapsible spacer.
5. Apply gear oil to pinion rear bearing, and assemble drive pinion into gear carrier.
6. Apply gear oil to pinion front bearing, and assemble pinion front bearing inner race to drive pinion assembly.
CAUTION:
Never reuse pinion front bearing inner race.
7. Using suitable spacer (A), press the pinion front bearing inner race to drive pinion as far as drive pinion nut can be tightened.
8. Using the drift (A) [SST: ST15310000 (J-25640-B)], install front oil seal in evenly until it becom es flush with the gear carrier.
CAUTION:
 Never reuse oil seal.
 When installing, never incline oil seal.
 Apply multi-purpose grease onto oil seal lips, and gear oil
onto the circumference of oil seal.
9. Install companion flange (1). NOTE:
When reusing drive pinion, align the matching mark (B) of drive
pinion with the matching mark (A) of companion flange, and then
install companion flange.
PDIA0805J
PDIA0492E
PDIA0762J
PDIA0764J
JSDIA0038ZZ
Revision: 2010 May2011 QX56

DLN-220
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DRIVE PINION
10. Apply anti-corrosion oil to the thread and seat of drive pinion
lock nut, and temporarily tighten drive pinion lock nut to drive
pinion, using flange wrench (c ommercial service tool).
CAUTION:
Never reuse drive pinion lock nut.
11. Adjust to the drive pinion lock nut tightening torque and pinion bearing preload torque, using preload gauge [SST: ST3127S000
(J-25765-A)].
CAUTION:
 Adjust to the lower limit of the drive pinion lock nut tight-
ening torque first.
 If the preload torque exceeds the specified value, replace
collapsible spacer and tighte n it again to adjust. Never
loosen drive pinion lock nut to adjust the preload torque.
 After adjustment, rotate dri ve pinion back and forth 2 to 3
times to check for unusual no ise, rotation malfunction,
and other malfunctions.
12. Install differential case assembly. Refer to DLN-206, "
Assem-
bly".
CAUTION:
Never install rear cover at this timing.
13. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash, and companion flange runout. Refer to DLN-210, "
Adjustment" and DLN-220, "Adjustment".
Recheck above items. Readjust the above description, if necessary.
14. Check total preload torque. Refer to DLN-210, "
Adjustment".
15. Install rear cover. Refer to DLN-206, "
Assembly".
AdjustmentINFOID:0000000006222428
COMPANION FLANGE RUNOUT
1. Fit a test indicator to the inner side of the companion flange
(socket diameter).
2. Rotate companion flange to check for runout.
3. If the runout value is outside t he runout limit, follow the proce-
dure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion by 90 ° step, and search for the position
where the runout is the minimum.
b. If the runout value is still outside of the limit after the phase has been changed, possible cause will be an
assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.
c. If the runout value is still outside of the limit after the check and repair, replace companion flange.
InspectionINFOID:0000000006222429
INSPECTION AFTER DISASSEMBLY
Drive Gear and Drive Pinion
 Clean up the disassembled parts.
 If the gear teeth never mesh or line-up correctly, det ermine the cause and adjust or replace as necessary.
Pinion bearing preload : Refer to
DLN-222, "
Pre-
load Torque".
JSDIA0047ZZ
Inner side of companion
flange runout: Refer to
DLN-222, "Com-
panion Flange Runout".
JPDID0399ZZ
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-221
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
 If the gears are worn, cracked, damaged, pitted or chi pped (by friction) noticeably, replace with new drive
gear and drive pinion as a set.
Bearing
 Clean up the disassembled parts.
 If any chipped (by friction), pitted, worn, rusted or scratched marks, or unusual noise from the bearing is
observed, replace as a bearing assembly (as a new set).
Oil Seal
 Whenever disassembled, replace.
 If wear, deterioration of adherence (sealing force lips ), or damage is detected on the lips, replace them.
Companion Flange
 Clean up the disassembled parts.
 If any chipped mark [about 0.1 mm, (0.004 in)] or other damage on the contact sides of the lips of the com-
panion flange is found, replace.
Revision: 2010 May2011 QX56