2011 INFINITI QX56 torque

DLN-170
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DIFFERENTIAL ASSEMBLY
4. Press side bearing inner races to the differential case with the
drift (A) and the base (B).
CAUTION:
Never reuse side bearing inner races.
5. Install housing spacer.
6. Install the differential case assembly with the side bearing outer races into the gear carrier.
CAUTION:
 Never reuse side bearing outer race when replacing sidebearing inner race (replace as a set).
 Apply differential gear oi l to the side bearings.
7. Insert left and right original side bearing adjusting washers in place between side bearings and gear carrier.
8. Install the side bearing caps with the matching marks aligned and tighten the side bearing cap bolts to the specified torque.
CAUTION:
Align matching marks on bearin g cap with that on gear car-
rier.
9. Install side oil seal (left side) until it becomes flush with the gear carrier with the drift (A and B).
CAUTION:
 Never reuse side 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.
A: Drift [SST: ST33230000 (J-35867)]
B: Base [SST: ST33061000 (J-8107-2)]
SPD353
SPD919
SPD924
SDIA1795E
A: Drift [SST: ST30720000 (J-25405)]
B: Drift [SST: ST27863000 ( — )]
PDIA0711E
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-171
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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10. Check and adjust drive gear runout, tooth contac t, backlash, and total preload torque. Refer to DLN-171,
"Adjustment".
Recheck above items. Readjust the above description, if necessary.
11. Apply sealant to match surface of carrier cover.  Use Genuine Silicone RTV or equivalent. Refer to GI-22,
"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.
12. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque.
13. Install side shaft. Refer to DLN-166, "
Assembly".
14. Install bushing with drift (commercial service tool).
AdjustmentINFOID:0000000006222394
TOTAL PRELOAD TORQUE
1. Install the differential side shaft. Refer to DLN-166, "Assembly".
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 with the preload gauge [SST: ST3127S000 (J-25765-A)].
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. Remove carrier cover. Refer to DLN-168, "Disassembly".
PDIA0712E
Total preload torque : Refer to DLN-185, "Pre-
load Torque".
PDIA0697E
When the preload torque is large
On drive pinion bear ings: Decrease the drive pinion bear ing adjusting washer and drive
pinion adjusting washer thi ckness. For selecting adjusting
washer, refer to the latest parts information.
On side bearings: Increase the side bear ing adjusting washer thickness. For se-
lecting adjusting washer, refer to the latest parts information.
When the preload torque is small On drive pinion bearings: Increase the drive pi nion bearing adjusting washer and drive
pinion adjusting washer thi ckness. For selecting adjusting
washer, refer to the latest parts information.
On side bearings: Decrease the side bear ing adjusting washer thickness. For se-
lecting adjusting washer, refer to the latest parts information.
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-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

DLN-182
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
5. Turn the assembly several times to seat the bearings.
6. Measure the turning torque at the end of the J-34309-2 gauge
anvil using preload gauge [SST: ST3127S000 (J-25765-A)].
7. Place the J-34309-10 “R180A” pinion height adapter onto the gauge plate and tighten it by hand.
CAUTION:
Make sure all machined surfaces are clean.
8. Position the side bearing discs, J-25269-18, and arbor firmly into
the side bearing bores. Install the bearing caps and tighten bear-
ing cap mounting bolts to the specified torque. Refer to DLN-
176, "Exploded View".
9. Select the correct standard pinion height adjusting washer thick- ness. Select by using a standard gauge of 3 mm (0.12 in) and J-
34309-101 feeler gauge. Measure the distance between the J-
34309-11 pinion height adapter including the standard gauge
and the arbor.
SPD770
Turning torque specifica-
tion : 1.08 – 1.66 N·m (0.11 –
0.16 kg-m, 10 – 14 in-lb)
PDIA0566E
SPD208A
SPD211A
SPD204A
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
DLN-185
< SERVICE DATA AND SPECIFICATIONS (SDS) [FRONT FINAL DRIVE: R180A]
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
General SpecificationsINFOID:0000000006222401
Drive Gear RunoutINFOID:0000000006222402
Unit: mm (in)
Preload TorqueINFOID:0000000006222403
Unit: N·m (kg-m, in-lb)
BacklashINFOID:0000000006222404
Unit: mm (in)
Companion Flange RunoutINFOID:0000000006222405
Unit: mm (in)
Applied model 4WD
VK56VD A/T
Final drive model R180A
Gear ratio 2.937
Number of teeth (Drive gear/Drive pinion) 47/16
Oil capacity (Approx.) (US pt, lmp pt)0.75 (1-5/8, 1-3/8)
Number of pinion gears 4
Drive pinion adjustment spacer type Collapsible
Item Limit
Drive gear back face runout 0.05 (0.0020)
Item Standard
Pinion bearing (P
1) 1.08 – 1.66 (0.11 – 0.16, 10 – 14)
Side bearing (P
2) 0.59 – 1.08 (0.06 – 0.11, 6 – 9)
Side bearing to pinion bearing (Total preload)
(Total preload = P
1 + P2) 1.67 – 2.74 (0.17 – 0.27, 15 – 24)
Item Standard
Drive gear to drive pinion gear 0.10 – 0.15 (0.0039 – 0.0059)
Item Limit
Companion flange face 0.10 (0.004)
Inner side of the companion flange 0.10 (0.004)
Revision: 2010 May2011 QX56

PREPARATIONDLN-189
< PREPARATION > [REAR FINAL DRIVE: R230]
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Commercial Service ToolINFOID:0000000006222408
—
(J-8129)
Spring gauge Measuring turning torque
KV38103300
(—)
Drift
a: 99 mm (3.90 in) dia. Installing drive pinion rear bearing outer race
ST30611000
(J-25742-1)
Drift bar Installing drive pinion front bearing outer race
ST30621000
(J-25742-5)
Drift
a: 79 mm (3.11 in) dia.
b: 59 mm (2.32 in) dia. Installing drive pinion front bearing outer race
ST30022000
(—)
Drift
a: 110 mm (4.33 in) dia.
b: 56 mm (2.20 in) dia.
c: 46 mm (1.81 in) dia. Installing pinion rear bearing inner race
Tool number
(Kent-Moore No.)
Tool name
Description
NT127
PDIA0933E
S-NT090
ZZA1000D
ZZA0978D
Revision: 2010 May2011 QX56