2011 INFINITI QX56 height

DLN-164
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
SIDE SHAFT
UNIT DISASSEMBLY AND ASSEMBLY
SIDE SHAFT
Exploded ViewINFOID:0000000006222387
1. Bushing 2. Bearing cap 3. Side bearing
4. Side bearing adjusting washer 5. Drive pinion 6. Pinion height adjusting washer
7. Pinion rear bearing 8. Collapsible spacer 9. Gasket
10. Drain plug 11. Side oil seal (left side) 12. Pinion front bearing
13. Front oil seal 14. Companion flange 15. Drive pinion lock nut
16. Gear carrier 17. Side shaft 18. Side shaft bearing
19. Snap ring 20. Snap ring 21. Side oil seal (right side)
22. Drive gear 23. Differential case assembly 24. Housing spacer
25. Filler plug 26. Carrier cover
A: Oil seal lip B: Screw hole C. Comply with the assembly proce-
dure when tightening. Refer to DLN-
169, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
JPDID0390GB
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-167
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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DIFFERENTIAL ASSEMBLY
Exploded ViewINFOID:0000000006222391
1. Bushing 2. Bearing cap 3. Side bearing
4. Side bearing adjusting washer 5. Drive pinion 6. Pinion height adjusting washer
7. Pinion rear bearing 8. Collapsible spacer 9. Gasket
10. Drain plug 11. Side oil seal (left side) 12. Pinion front bearing
13. Front oil seal 14. Companion flange 15. Drive pinion lock nut
16. Gear carrier 17. Side shaft 18. Side shaft bearing
19. Snap ring 20. Snap ring 21. Side oil seal (right side)
22. Drive gear 23. Differential case assembly 24. Housing spacer
25. Filler plug 26. Carrier cover
A: Oil seal lip B: Screw hole C. Comply with the assembly proce- dure when tightening. Refer to DLN-
169, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
: Apply multi-purpose grease.
JPDID0390GB
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-173
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4. If the tooth contact is improperly adjusted, 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
For selecting adjusting washer, refer to the latest parts infor-
mation.
SDIA2549E
SDIA0517E
PDIA0440E
Revision: 2010 May2011 QX56

DLN-174
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DIFFERENTIAL ASSEMBLY
 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.
For selecting adjusting washer, refer to the latest parts infor-
mation.
BACKLASH
1. Remove carrier cover. Refer to DLN-168, "Disassembly".
2. Fit a dial indicator to the drive gear face to measure the back- lash.
 If the backlash is outside of the specification, change the thick-
ness of the side bearing adjusting washers.
CAUTION:
Never change the total amount of wash ers as it changes the preload torque.
InspectionINFOID:0000000006222395
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 ch ipped (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
PDIA0441E
Backlash : Refer to DLN-185, "Back-
lash".
When the backlash is large: Make drive gear back side adjusting washer thicker,
and drive tooth side adjust ing washer thinner by the
same amount. For selecting adjusting washer, refer to
the latest parts information.
If the backlash is less than specification: Make drive gear back side ad justing washer thinner,
and drive tooth side adjust ing washer thicker by the
same amount. For selecting adjusting washer, refer to
the latest parts information.
SPD513
Revision: 2010 May2011 QX56

DLN-176
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
DRIVE PINION
Exploded ViewINFOID:0000000006222396
1. Bushing 2. Bearing cap 3. Side bearing
4. Side bearing adjusting washer 5. Drive pinion 6. Pinion height adjusting washer
7. Pinion rear bearing 8. Collapsible spacer 9. Gasket
10. Drain plug 11. Side oil seal (left side) 12. Pinion front bearing
13. Front oil seal 14. Companion flange 15. Drive pinion lock nut
16. Gear carrier 17. Side shaft 18. Side shaft bearing
19. Snap ring 20. Snap ring 21. Side oil seal (right side)
22. Drive gear 23. Differential case assembly 24. Housing spacer
25. Filler plug 26. Carrier cover
A: Oil seal lip B: Screw hole C. Comply with the assembly proce-
dure when tightening. Refer to DLN-
169, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
: Apply multi-purpose grease.
JPDID0390GB
Revision: 2010 May2011 QX56

DLN-178
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
7. Remove the front oil seal with a suitable tool.
CAUTION:
Never damage gear carrier.
8. Remove the drive pinion front bearing inner race.
9. Remove the collapsible spacer.
10. Remove the drive pinion rear bearing inner race and drive pinion height adjusting washer with the replacer (commercial service
tool).
11. Remove the drive pinion front and rear bearing outer races by tapping them uniformly with a suitable tool.
CAUTION:
Never damage gear carrier.
12. Perform inspection after disassembly. Refer to DLN-184,
"Inspection".
PDIA0716E
S-PD179
PDIA0705E
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-179
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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AssemblyINFOID:0000000006222398
1. Install drive pinion rear bearing outer race and drive pinion front bearing outer race using Tools.
CAUTION:
 First tap the drive pinion bearing outer race until it
becomes flush with the gear carrier.
 Never reuse drive pinion fron t and rear bearing outer race.
2. Select pinion height adjusting washer. Refer to DLN-181,
"Adjustment".
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: ST30901000 (J-26010-01)].
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. CAUTION:
Never reuse collapsible spacer.
5. Assemble drive pinion into gear carrier. CAUTION:
Apply gear oil to pinion rear bearing.
6. Assemble pinion front bearing inner race to drive pinion assem- bly.
CAUTION:
 Never reuse pinion front bearing inner race.
 Apply gear oil to pinion front bearing.
A: Drift bar [SST: ST30611000 (J-25742-1)]
B: Drift [SST: ST30313000 (J-25742-3)]
C: Drift [SST: KV38100200 (J-26233)]
PDIA0707E
PDIA0805J
PDIA0708E
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-181
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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Never install carrier cover yet.
13. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash. Refer to DLN-171,
"Adjustment".
14. Install side shaft. Refer to DLN-166, "
Assembly".
15. Check and adjust companion flange runout. Refer to DLN-181, "
Adjustment".
16. Check total preload torque. Refer to DLN-171, "
Adjustment".
17. Install carrier cover. Refer to DLN-169, "
Assembly".
AdjustmentINFOID:0000000006222399
PINION GEAR HEIGHT
1. Make sure all parts are clean and that the bearings are well
lubricated.
2. Assemble the pinion gear beari ngs into the differential shim
selector tool [SST: — (J-34309)].
 Pinion front bearing; make sure the J-34309-3 pinion front
bearing seat is secured tightly against the J-34309-2 gauge
anvil. Then turn the pinion front bearing pilot, J-34309-7, to
secure the bearing in its proper position.
 Pinion rear bearing; the pinion rear bearing pilot, J-34309-8,
is used to center the pinion rear bearing only. The pinion rear
bearing locking seat, J-34309-4, is used to lock the bearing to
the assembly.
 Installation of J-34309-9 and J-34309-16; place a suitable
2.5 mm (0.098 in) thick plain washer between J-34309-9 and
J-34309-16. Both surfaces of J-34309-9 and J-34309-16 must
be parallel with a clearance of 2.5 mm (0.098 in).
3. Install the pinion rear bearing inner race into gear carrier. Then place the pinion preload shim selector tool, J-34309-1, gauge
screw assembly.
4. Assemble the pinion front bearing inner race and the J-34309-2 gauge anvil. Assemble them together with the J-34309-1 gauge
screw in gear carrier. Make sure that the pinion height gauge
plate, J-34309-16, turns a full 360 degrees. Tighten the two sec-
tions together by hand.
SPD769
SPD197A
SPD893
SPD199A
Revision: 2010 May2011 QX56