2007 INFINITI QX56 oil

FRONT FINAL DRIVE ASSEMBLY
FFD-17
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P Backlash
1. Fit a dial indicator to the drive gear face to measure the back-
lash.
• If the backlash is outside of the specification, adjust each side
bearing adjuster.
CAUTION:
Do not change the side bearing adjusters by different
amounts as it will change the side bearing preload torque.
Companion Flange Runout
1. Rotate companion flange and check for runout on the compan-
ion flange face (inner side of the bolt holes) and companion
flange inner side (socket diameter) using suitable tool.
2. If the runout is outside the runout limit, follow the procedure
below to adjust.
a. Rotate the companion flange on the drive pinion by 90°, 180°
and 270° while checking for the position where the runout is minimum.
b. If the runout is still outside of the runout limit after the companion flange has been rotated on the drive pin-
ion, possible cause could be an assembly malfunction of drive pinion and drive pinion bearing or a mal-
functioning 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
Differential Assembly
1. Drain the differential gear oil if necessary.Backlash: 0.12 - 0.20 mm (0.0050 - 0.0079 in)
SPD513
If the backlash is greater than specification:
Loosen side bearing adjuster A and tighten side bear-
ing adjuster B by the same amount.
If the backlash is less than specification:
Loosen side bearing adjuster B and tighten side bear-
ing adjuster A by the same amount.
SDIA2262E
Runout limit
Companion flange face: 0.10 mm (0.0039 in)
Companion flange inner side: 0.13 mm (0.0051 in)
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FFD-18
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FRONT FINAL DRIVE ASSEMBLY
2. Remove the differential side shaft and differential side flange
using suitable tool.
3. Remove the extension tube and O-ring from the gear carrier.
4. Place a small hole in the side oil seal case using suitable tool.
5. Remove the side oil seal using Tool as shown.
6. 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.
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SDIA3205E
LDIA0129E
Tool number : SP8P
LDIA0130E
Tool number : KV10111100 (J-37228)
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FFD-22
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FRONT FINAL DRIVE ASSEMBLY
7. Place a small hole in the front oil seal case using suitable tool.
8. Remove the front oil seal using Tool as shown.
9. Remove the drive pinion front bearing inner race.
10. Remove the drive pinion front bearing outer race using Tool as
shown. Locate the driver on the back edge of the drive pinion
front bearing outer race, then drive the drive pinion front bearing
outer race out.
CAUTION:
Do not damage gear carrier.
11. Remove the drive pinion rear bearing outer race using Tool as
shown. Locate the driver on the back edge of the drive pinion
rear bearing outer race, then drive the drive pinion rear bearing
outer race out.
CAUTION:
Do not damage gear carrier.
INSPECTION AFTER DISASSEMBLY
Clean the disassembled parts. Then inspect the parts for wear or damage. If wear or damage are found, follow
the measures below.
Drive Pinion and Drive Gear
• If the drive pinion and drive gear teeth do not mesh or line-up correctly, determine the cause and adjust,
repair, or replace as necessary.
• If the drive pinion or drive gear are worn, cracked, damaged, pitted or chipped (by friction) noticeably,
replace with new drive pinion and drive gear.
LDIA0129E
Tool number : SP8P
LDIA0130E
Tool number A: C-4171
B: D-103
LDIA0131E
Tool number A: C-4171
B: C-4307
LDIA0132E

FRONT FINAL DRIVE ASSEMBLY
FFD-23
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• Drive pinion and drive gear are supplied in matched sets only. Matching numbers on both drive pinion and
drive gear are etched for verification. If a new drive pinion and drive gear set are being used, verify the num-
bers of each drive pinion and drive gear before proceeding with assembly.
Bearing
• If bearings are chipped (by friction), pitted, worn, rusted, scratched, or unusual noise is coming from bearing,
replace with new bearing assembly (as a new set).
• Bearing must be replaced with a new one whenever disassembled.
Side Gear and Pinion Mate Gear
• If any cracks or damage are found on the surface of the teeth, replace with new one.
• If any worn or chipped marks are found on the side of the side gear and pinion mate gear which contact the
thrust washer, replace with new one.
• Replace both side gear and pinion mate gear as a set when replacing side gear or pinion mate gear.
Side Gear Thrust Washer and Pinion Mate Thrust Washer
• If any chips (by friction), damage, or unusual wear are found, replace with new one.
Gear Carrier
• If any wear or cracks are found on the contact sides of gear carrier, replace with new one.
Companion Flange
• If any chips (about 0.1mm, 0.004 in) or other damage on the companion flange surface which contacts the
front oil seal lips are found, replace with new one.
ADJUSTING AND SELECTING WASHERS
Side Gear Back Clearance
• Assemble the differential parts if they are disassembled.
1. Place the differential case straight up so that the side gear to be
measured is upward.
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FFD-26
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
4. 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:
Do not reuse drive pinion rear bearing inner race.
5. Install the collapsible spacer to the drive pinion.
CAUTION:
Do not reuse collapsible spacer.
6. Apply differential gear oil to the drive pinion rear bearing, and
install the drive pinion assembly to the gear carrier.
7. 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.
8. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly using Tools.
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. Tap the companion flange until fully seated
using suitable tool.Tool number : C-4040
SDIA2253E
PDIA0708E
Tool number A: KV38100500 (J-25273)
B: KV38102200 ( — )
PDIA0717E
SDIA2266E

FRONT FINAL DRIVE ASSEMBLY
FFD-27
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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.
• 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.
12. Install the differential case assembly.
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.
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.Tool number A: KV38108300 (J-44195)
B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque:
2.3 - 3.4 N·m (24 - 34 kg-cm, 21 - 30 in-lb)
WDIA0382E
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FRONT FINAL DRIVE ASSEMBLY
FFD-29
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10. Install side bearing adjusters into gear carrier.
11. 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).
12. Install the side bearing caps with the matching marks aligned.
NOTE:
Do not tighten at this step. This allows further tightening of side
bearing adjusters.
13. Tighten each side bearing adjuster alternately turning drive gear.
14. Check and adjust tooth contact, backlash, drive gear runout and total preload torque.
Recheck above items.
• After adjusting tooth contact and backlash secure side bearing
adjuster with screws and tighten side bearing cap bolt to the
specified torque.
15. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly to
the gear carrier using suitable tool.
CAUTION:
• Do not reuse side oil seal.
• Do not incline the new side oil seal when installing.
• Apply multi-purpose grease to the lips of the new side oil seal.
SPD527
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FFD-30
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
16. Install the extension tube with a new O-ring.
CAUTION:
• Do not reuse O-ring.
• If the extension tube is being replaced, install a new axle
shaft bearing.
17. Apply 3 mm (0.12 in) bead of sealant to the mating surface of
the carrier cover as shown.
• Use Genuine Silicone RTV or equivalent. Refer to GI-45,
"Recommended Chemical Product and Sealant".
CAUTION:
Remove any old sealant adhering to the mating surfaces.
Also remove any moisture, oil, or foreign material adhering
to the application and mating surfaces.
18. Install the carrier cover to the gear carrier. Tighten the bolts to
the specified torque.
19. Install side shaft and side flange.
SDIA3205E
SDIA3204E