differential INFINITI QX56 2011 Factory Workshop Manual

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

DRIVE PINIONDLN-177
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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DisassemblyINFOID:0000000006222397
1. Remove the side shaft. Refer to DLN-165, "Disassembly".
2. Remove the differential assembly. Refer to DLN-168, "
Disassembly".
3. Remove the drive pinion lock nut with a flange wrench (commer- cial service tool).
4. 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, marks use paint. Never damage companion
flange and drive pinion.
5. Remove the companion flange with the puller (commercial ser- vice tool).
6. Press the drive pinion assembly. CAUTION:
Never drop drive pinion assembly.
: Apply Genuine Silicone RTV or equivalent. Refer to GI-22, "Recommended Chemical Products and Sealants".
: 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.
PDIA0702E
PDIA0799J
PDIA0703E
PDIA0704E
Revision: 2010 May2011 QX56

DLN-180
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
7. Using drift [SST: ST33200000 (J-26082)], press the pinion front
bearing inner race to drive pinion as far as drive pinion nut can
be tightened.
8. Install front oil seal as shown in figure with the drifts (A and B). CAUTION:
 Never reuse oil seal.
 When installing, n ever 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 (1).
10. Temporarily tighten drive pinion lock nut to drive pinion. CAUTION:
 Apply anti-corrosion oil to th e thread and seat of the drive
pinion lock nut
 Never reuse drive pinion lock nut.
11. Tighten to drive pinion lock nut using flange wrench (A), while adjusting pinion bearing preload torque using preload gauge (B).
CAUTION:
 Adjust to the lower limit of the drive pinion lock nut tight-
ening torque first.
 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-169, "
Assem-
bly".
CAUTION:
PDIA0709E
A: Drift [SST: ST30720000 (J-25405)]
B: Drift [SST: ST27863000 ( — )]
PDIA0717E
PDIA0799J
A: Flange wrench (commercial service tool)
B: Preload gauge [SST: ST3127S000 (J-25765-A)]
Pinion bearing preload : Refer to DLN-185, "Pre-
load Torque".
WDIA0382E
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

DRIVE PINIONDLN-183
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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10. Write down exact measurement (the value of feeler gauge).
11. Correct the pinion height washer size by referring to the “pinion head number”.
There are two numbers painted on the drive pinion. The first
one refers to the drive pinion and drive gear as a matched
set. This number should be the same as the number on the
drive gear. The second number is the “pinion head height
number”. It refers to the ideal pinion height from standard
for quietest operation. Use th e following chart to determine
the correct pinion height washer.
12. Select the correct pinion height adjusting washer. For selecting adjusting washer, refer to the latest parts information.
13. Remove the J-34309 differential shim selector tool from the final drive housing. Then disassemble to retrieve the pinion bearings.
COMPANION FLANGE RUNOUT
SPD775
Pinion head height number Add or remove from the standard pinion height ad-
justing washer thickness measurement
− 6
− 5
− 4
− 3
− 2
− 1
0
+1
+2
+3
+4
+5
+6 Add 0.06 mm (0.0024 in)
Add 0.05 mm (0.0020 in)
Add 0.04 mm (0.0016 in)
Add 0.03 mm (0.0012 in)
Add 0.02 mm (0.0008 in)
Add 0.01 mm (0.0004 in)
Use the selected washer thickness
Subtract 0.01 mm (0.0004 in)
Subtract 0.02 mm (0.0008 in)
Subtract 0.03 mm (0.0012 in)
Subtract 0.04 mm (0.0016 in)
Subtract 0.05 mm (0.0020 in)
Subtract 0.06 mm (0.0024 in)SPD542
SPD205A
Revision: 2010 May2011 QX56

DLN-190
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
Tool name
Description
Flange wrench Removing and installing drive pinion lock nut
Puller Removing companion flange
Sliding hammer Removing differential case assembly
Puller Removing drive pinion rear bearing inner race
Spacer
a: 60 mm (2.36 in) dia.
b: 36 mm (1.42 in) dia.
c: 30 mm (1.18 in) Installing drive pinion front bearing inner race
Power tool Loosing nuts and bolts
NT035
ZZA0119D
NT125
ZZA0700D
ZZA1133D
PBIC0190E
Revision: 2010 May2011 QX56

STRUCTURE AND OPERATIONDLN-191
< SYSTEM DESCRIPTION > [REAR FINAL DRIVE: R230]
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SYSTEM DESCRIPTION
STRUCTURE AND OPERATION
Sectional ViewINFOID:0000000006222409
CROSS-SECTIONAL VIEW
1. Side flange 2. Pinion mate gear 3. Drive gear
4. Pinion mate shaft 5. Differential case 6. Side bearing
7. Drive pinion 8. Pinion front bearing 9. Companion flange
10. Collapsible spacer 11. Pinion rear bearing 12. Side gear
PDIA0923E
Revision: 2010 May2011 QX56

REAR DIFFERENTIAL GEAR OILDLN-193
< PERIODIC MAINTENANCE > [REAR FINAL DRIVE: R230]
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PERIODIC MAINTENANCE
REAR DIFFERENTIAL GEAR OIL
InspectionINFOID:0000000006222411
OIL LEAKAGE
Check that differential gear oil is not leaking fr om the rear final drive assembly or around it.
OIL LEVEL
 Remove filler plug (1) and check oil level from filler plug mounting
hole as shown in the figure.
CAUTION:
Never start engine while checking oil level.
 Set a gasket on filler plug (1) and install it on final drive assembly. Refer to DLN-203, "
Exploded View".
CAUTION:
Never reuse gasket.
DrainingINFOID:0000000006222412
1. Stop the engine.
2. Remove drain plug (1) and drain gear oil.
3. Set a gasket on drain plug (1) and install it to final drive assem- bly and tighten to the specified torque. Refer to DLN-203,
"Exploded View".
CAUTION:
Never reuse gasket.
RefillingINFOID:0000000006222413
1. Remove filler plug (1). Fill with new gear oil until oil level reaches the specified level near filler plug mounting hole.
2. After refilling oil, check oil level. Set a gasket to filler plug (1), then install it to final drive assembly. Refer to DLN-203,
"Exploded View".
CAUTION:
Never reuse gasket.
JPDID0415ZZ
JPDID0392ZZ
Oil grade and viscosity : Refer to MA-10, "Fluids and
Lubricants".
Oil capacity : Refer to DLN-222, "
General
Specification".
JPDID0415ZZ
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-203
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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UNIT DISASSEMBLY AND ASSEMBLY
DIFFERENTIAL ASSEMBLY
Exploded ViewINFOID:0000000006222420
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. Co mply with the assembly proce-
dure when tightening. Refer to DLN-
206, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
JPDID0397GB
Revision: 2010 May2011 QX56

DLN-204
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DIFFERENTIAL ASSEMBLY
Disassembly
INFOID:0000000006222421
1. Drain gear oil, if necessary.
2. Remove side flanges.
3. Remove rear cover mounting bolts.
4 . R e m o v e r e a r c o v e r t o i n s e r t t h e s e a l c u t t e r [ S S T: K V 1 0 1111 0 0 (J-37228)] between gear carrier and rear cover.
CAUTION:
 Never damage the mating surface.
 Never insert flat-bladed screwdriver, this may damage themating surface.
5. Using spacers, mount carrier on the attachment (A) [SST:
KV38100800 (J-25604-01)].
6. For proper reinstallation, paint matching marks on one side of the bearing cap.
CAUTION:
 For matching marks, use paint. Never damage bearingcaps and gear carrier.
 Bearing caps are manufactured as integral molding. Use the matching marks to them in their original positions.
7. Remove bearing caps.
: Apply Genuine Silicone RTV or equivalent. Refer to GI-22, "Recommended Chemical Products and Sealants".
: 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.
PDIA0940E
JSDIA0041ZZ
SDIA1795E
S-PD343
Revision: 2010 May2011 QX56