differential INFINITI QX56 2006 Factory Workshop Manual

REAR FINAL DRIVE ASSEMBLYRFD-19
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could be an assembly malfunction of drive pinion and drive pinion bearing or a malfunctioning drive pinion
bearing.
c. If the runout is still outside of the runout limit after repair of the assembly of drive pinion and drive pinion bearing or drive pinion bearing, replace the companion flange.
DISASSEMBLY
Side Flange
1. Drain the differential gear oil if necessary.
2. Remove the side flange using Tools.
3. Remove the side oil seal using suitable tool.
CAUTION:
Do not to damage gear carrier.
Differential Assembly
1. Remove the side flanges. Refer to RFD-19, "Side Flange" .
2. Remove the carrier cover bolts.
3. 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 screwdriver, this will damage the
mating surface.
4. Mount the carrier on the Tool using two 45 mm (1.77 in) spacers.
5. For proper reinstallation, paint matching marks on one side of the side bearing cap and gear carrier.
CAUTION:

For matching marks, use paint. Do not damage side bear-
ing cap or gear carrier.

Side bearing caps are line-board during manufacture.
The matching marks are used to reinstall them in their
original positions.Tool numbers A: KV40104100 ( — )
B: ST36230000 (J-25840-A)
Tool number : KV10111100 (J-37228)
WDIA0123E
Tool number : KV38100800 (J-25604-01)
SPD888
SDIA1795E

RFD-20
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
6. Remove the side bearing caps.
7. Lift the differential case assembly out using Tool.
CAUTION:

Keep side bearing outer races together with inner race.
Do not mix them up.

Keep side bearing adjusting washers together with side
bearings.
S-PD343
Tool number : HT72400000 ( — )
S-PD344
SPD919

REAR FINAL DRIVE ASSEMBLYRFD-21
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Revision: November 2009 2006 QX56
8. Remove the side bearing inner races using Tools.
CAUTION:

Engage Tool jaws in bearing groove to prevent damage.

Place copper plates between the side bearing and drive
gear and the vise to prevent damage.

Do not remove side bearing inner race unless it is being
replaced.
9. For proper reinstallation, paint matching marks on the differential case and drive gear.
CAUTION:
Use paint for matching marks. Do not damage differential
case or drive gear.
10. Remove the drive gear bolts.
11. Tap the drive gear off the differential case using suitable tool. CAUTION:
Tap evenly all around to keep drive gear from bending.
12. Remove the lock pin of the pinion mate shaft from the drive gear side using suitable tool.
13. Remove the pinion mate shaft. Tool number A: ST3306S001 ( — )
B: ST33061000 (J-8107-2)
SPD920
PDIA0496E
WDIA0132E
SDIA0031J

RFD-22
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
14. Turn the pinion mate gear, then remove the pinion mate gear,
pinion mate thrust washer, side gear and side gear thrust
washer from the differential case.
Drive Pinion Assembly
1. Remove the differential assembly. Refer to RFD-19, "Differential Assembly" .
2. Remove the drive pinion lock nut using Tool.
3. Put matching marks on the companion flange and drive pinion using paint.
CAUTION:
Use paint to make the matching marks. Do not damage the
companion flange or drive pinion.
4. Remove the companion flange using suitable tool.
5. Press the drive pinion assembly (with rear inner bearing race and collapsible spacer) out of the gear carrier.
CAUTION:
Do not drop drive pinion assembly.
6. Remove the front oil seal. CAUTION:
Do not damage gear carrier.
7. Remove the drive pinion front bearing inner race.
SDIA0032J
Tool number : KV40104000 ( — )
SDIA1144E
SDIA1132E
SPD892

RFD-24
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
ADJUSTING AND SELECTING WASHERS
Side Gear Back Clearance

Assemble the differential parts if they are disassembled. Refer to RFD-28, "Differential Assembly" .
1. Place the differential case straight up so that the side gear to be measured is upward.
2. Using feeler gauges, measure the clearance between the side gear back and differential case at three different points, while
rotating the side gear. Average the three readings to calculate
the clearance. (Measure the clearance of the other side as well.)

If the side gear back clearance is outside of the specification,
use a thicker or thinner side gear thrust washer to adjust.
Refer to RFD-32, "
Side Gear Thrust Washer" .
CAUTION:

Insert feeler gauges with the same thickness on both
sides to prevent side gear from tilting.

Each gear should rotate smoothly without excessive
resistance during differential motion.

Select a side gear thrust washer for right and left individ-
ually.
NOTE:
Side gear back clearance is clearance between side gear and differential case for adjusting side gear
backlash.
Side Bearing Preload Torque

A selection of side bearing adjusting washers is required for successful completion of this procedure.
1. Apply differential gear oil to the side bearings, and install the dif- ferential case assembly with the side bearing outer races into
the gear carrier.
CAUTION:
Do not reuse side bearing outer race when replacing side
bearing inner race (replace as a set).
PDIA0460E
Side gear back clearance: 0.20 mm (0.0079 in) or less.
If the side gear back clearance is greater than
specification:
Use a thicker side gear thrust washer.
If the side gear back clearance is less than
specification: Use a thinner side gear thrust washer.
PDIA0576E
SPD527

REAR FINAL DRIVE ASSEMBLYRFD-25
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Revision: November 2009 2006 QX56
2. Insert the left and right original side bearing adjusting washers in
place between side bearings and gear carrier.
3. Align the matching mark on the side bearing cap with the match- ing mark on the gear carrier.
4. Install the side bearing caps and tighten the side bearing cap bolts to the specified torque. Refer to RFD-15, "
COMPO-
NENTS" .
5. Turn the differential assembly several times to seat the side bearings.
6. To determine side bearing preload torque, measure the pulling force of the differential assembly at the drive gear bolt using
To o l .
NOTE:
If pulling force of the differential assembly at the drive gear bolt
is within specification, side bearing preload torque will also be
within specification. Refer to RFD-32, "
PRELOAD TORQUE" .
7. If the pulling force is outside the specification, use a thicker or thinner side bearing adjusting washer to adjust. Refer to RFD-
33, "Side Bearing Adjusting Washer" .
CAUTION:
Select a side bearing adjusting washer for right and left
individually.
8. Record the total amount of washer thickness required for the correct side bearing preload torque.
SPD924
SDIA1795E
Tool number : — (J-8129)
Specification : 34.2 - 39.2 N (3.5 - 4.0 kg, 7.7 - 8.8 lb) of pulling force at the drive gear bolt
SPD194A
If the pulling force is less than the specification:
Use a thicker side bearing adjusting washer.
If the pulling force is greater than the specification: Use a thinner side bearing adjusting washer.
SPD772

RFD-26
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
ASSEMBLY
Drive Pinion Assembly
1. Install the drive pinion front and rear bearing outer races using
To o l s .
CAUTION:
Do not reuse drive pinion front and rear bearing outer race.
2. Select a drive pinion height adjusting washer. Refer to RFD-33, "
Drive Pinion Height Adjusting Washer" .
3. Install the selected drive pinion height adjusting washer to the drive pinion. Press the drive pinion rear bearing inner race to it
using Tool.
CAUTION:

Install the drive pinion height adjusting washer in the
proper direction as shown.

Do not reuse drive pinion rear bearing inner race.
4. Assemble the collapsible spacer to the drive pinion. CAUTION:
Do not reuse collapsible spacer.
5. Apply differential gear oil to the drive pinion rear bearing, and install the drive pinion assembly to the gear carrier.
6. Apply differential gear oil to the drive pinion front bearing, and install the drive pinion front bearing inner race to the drive pinion
assembly.
CAUTION:
Do not reuse drive pinion front bearing inner race.Tool number A: ST15310000 ( — )
B: ST35325000 ( — )
C: ST30621000 ( — )
SPD992
Tool number : ST30022000 ( — )
SPD377
PDIA0492E

REAR FINAL DRIVE ASSEMBLYRFD-27
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Revision: November 2009 2006 QX56
7. Press the drive pinion front bearing inner race to the drive pinion
as far as drive pinion lock nut can be tightened using suitable
spacer.
8. Apply multi-purpose grease to the lips of the new front oil seal. Then drive the new front oil seal in evenly until it becomes flush
with the gear carrier using Tool.
CAUTION:

Do not reuse front oil seal.

Do not incline the new front oil seal when installing.

Apply multi-purpose grease to the lips of the new front oil
seal.
9. Install the companion flange to the drive pinion while aligning the matching marks.
10. 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 Tool A, and check
the drive pinion bearing preload torque using Tool B.
CAUTION:

Do not reuse drive pinion lock nut.

Apply anti-corrosive oil to the 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 RFD-15, "
COMPONENTS" .

If the drive pinion bearing preload torque exceeds the
specified value, replace collapsible spacer and tighten it
again to adjust. Do not loosen drive pinion lock nut to
adjust the drive pinion bearing preload torque.

After adjustment, rotate drive pinion back and forth 2 to 3
times to check for unusual noise, rotation malfunction,
and other malfunctions.
11. Check companion flange runout. Refer to RFD-18, "
Companion Flange Runout" .
12. Install the differential case assembly. Refer to RFD-28, "
Differential Assembly" .
SPD896
Tool number : ST15310000 ( — )
PDIA0563E
Tool number A: KV40104000 ( — )
B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque: 1.77 - 2.64 N·m (0.18 - 0.26 kg-m, 16 - 23 in-lb)
WDIA0379E

RFD-28
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
Differential Assembly
1. Install side gear thrust washers with the same thickness as the
ones installed prior to disassembly, or reinstall the old ones on
the side gears.
2. Install the side gears and side gear thrust washers into the dif- ferential case.
CAUTION:
Make sure that the circular clip is installed to side gears.
3. Install the pinion mate thrust washers to the two pinion mate gears. Then install the pinion mate gears with the pinion mate
thrust washers by aligning them in diagonally opposite positions
and rotating them into the differential case.
4. Align the lock pin hole on the differential case with the lock pin hole on the pinion mate shaft, and install the pinion mate shaft.
5. Measure the side gear end play. If necessary, select the appro- priate side gear thrust washers. Refer to RFD-32, "
SIDE GEAR
CLEARANCE" .
6. Drive a new lock pin into the pinion mate shaft until it is flush with the differential case using suitable tool.
CAUTION:
Do not reuse lock pin.
SDIA0193J
SDIA2025E
SDIA0195J
WDIA0131E

REAR FINAL DRIVE ASSEMBLYRFD-29
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7. Align the matching mark of the differential case with the mark of
the drive gear, then place the drive gear onto the differential
case.
8. Apply thread locking sealant into the threaded holes of the drive gear and install the bolts.

Use Genuine Medium Strength Thread Locking Sealant or
equivalent. Refer to GI-46, "
Recommended Chemical Prod-
ucts and Sealants" .
CAUTION:
Make sure the drive gear back and threaded holes are
clean.
9. Tighten the drive gear bolts to the specified torque. Refer to RFD-15, "
COMPONENTS" . After tightening the drive gear bolts
to the specified torque, tighten an additional 34 ° using Tool.
CAUTION:

Always use Tool. Avoid tightening based on visual check
alone.

Tighten drive gear bolts in a crisscross pattern.
10. Press the side bearing inner races into the differential case using Tools.
CAUTION:
Do not reuse side bearing inner race.
11. Install the differential case assembly with the side bearing outer races into the gear carrier.
12. Measure the side bearing preload torque. If necessary, select the appropriate side bearing adjusting washers. Refer to RFD-
24, "Side Bearing Preload Torque" .
SDIA2593E
SDIA2594E
Tool number : KV10112100-A (BT-8653-A)
SDIA0247J
Tool number A: KV38100200 (J-26233)
B: ST33081000 ( — )
SPD353
SPD919