2007 INFINITI QX56 Factory Service Manual

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Page 2569 of 3061

INFINITI QX56 2007 Factory Service Manual RFD-12
< SERVICE INFORMATION >
SIDE OIL SEAL
Check the differential gear oil level after installation. Refer to RFD-8, "Checking Differential Gear
Oil".

Page 2570 of 3061

INFINITI QX56 2007 Factory Service Manual CARRIER COVER
RFD-13
< SERVICE INFORMATION >
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CARRIER COVER
Removal and InstallationINFOID:0000000003532605
REMOVAL
1. Remove the rear final drive assembly. Refer to RF

Page 2571 of 3061

INFINITI QX56 2007 Factory Service Manual RFD-14
< SERVICE INFORMATION >
REAR FINAL DRIVE ASSEMBLY
REAR FINAL DRIVE ASSEMBLY
Removal and InstallationINFOID:0000000003532606
REMOVAL
1. Remove the spare tire.
2. Drain the differential gear oil.

Page 2572 of 3061

INFINITI QX56 2007 Factory Service Manual REAR FINAL DRIVE ASSEMBLY
RFD-15
< SERVICE INFORMATION >
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7. Place a suitable jack under the rear final drive assembly.
CAUTION:
Do not place the jack on the carrier co

Page 2573 of 3061

INFINITI QX56 2007 Factory Service Manual RFD-16
< SERVICE INFORMATION >
REAR FINAL DRIVE ASSEMBLY
1. Drive pinion lock nut 2. Companion flange 3. Front oil seal
4. Drive pinion front bearing 5. Collapsible spacer 6. Drive pinion rear bearin

Page 2574 of 3061

INFINITI QX56 2007 Factory Service Manual REAR FINAL DRIVE ASSEMBLY
RFD-17
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ASSEMBLY INSPECTION AND ADJUSTMENT
• Drain the differential gear oil before inspection and adjustment. Refer

REAR FINAL DRIVE ASSEMBLY
RFD-17
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ASSEMBLY INSPECTION AND ADJUSTMENT
• Drain the differential gear oil before inspection and adjustment. Refer to RFD-8.
• Remove and install the carrier cover as necessary for inspection and adjustment. Refer to RFD-13
.
Total Preload Torque
1. Remove the side flanges if necessary.
CAUTION:
The side flanges shaft must removed in order to measure total preload torque.
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 the total preload torque using Tool.
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.
CAUTION:
Select a side bearing adjusting washer for right and left individually.
Drive Gear Runout
1. Fit a dial indicator to the drive gear back face.
2. Rotate the drive gear to measure runout.
• If the runout is outside of the limit, check the condition of the drive
gear assembly. Foreign material may be caught between the drive
gear and differential case, or the differential case or drive gear may
be deformed.
CAUTION:
Replace drive gear and drive pinion as a set.
Tooth Contact
19. Side bearing adjusting washer 20. Bearing cap 21. Carrier cover
22. Filler plug 23. Drain plug 24. Side oil seal
Tool number : ST3127S000 (J-25765-A)
Total preload torque:
2.05 - 4.11 N·m (0.21 - 0.42 kg-m, 19 - 36 in-lb)
SPD884
If the total preload torque is greater than specification
On drive pinion bearings: Replace the collapsible spacer.
On side bearings: Use thinner side bearing adjusting washers by the same
amount on each side. Refer to RFD-32, "
Inspection and Adjust-
ment".
If the total preload torque is less than specification
On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Use thicker side bearing adjusting washers by the same
amount on each side. Refer to RFD-32, "
Inspection and Adjust-
ment".
Runout limit : 0.05 mm (0.0020 in) or less
SPD886

Page 2575 of 3061

INFINITI QX56 2007 Factory Service Manual RFD-18
< SERVICE INFORMATION >
REAR FINAL DRIVE ASSEMBLY
1. Apply red lead to the drive gear.
NOTE:
Apply red lead to both faces of three to four gears, at four loca-
tions evenly spaced on the drive

Page 2576 of 3061

INFINITI QX56 2007 Factory Service Manual REAR FINAL DRIVE ASSEMBLY
RFD-19
< SERVICE INFORMATION >
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1. Fit a dial indicator to the drive gear face to measure the back-
lash.
• If the backlash is outs

REAR FINAL DRIVE ASSEMBLY
RFD-19
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1. Fit a dial indicator to the drive gear face to measure the back-
lash.
• If the backlash is outside of the specification, change the thickness
of the side bearing adjusting washers.
CAUTION:
Do not change the total thickness of side bearing adjusting washers as it will change the side bearing
preload torque.
Companion Flange Runout
1. Rotate companion flange and check for runout on the outer face
of the companion flange using suitable tool.
2. If the runout is outside of 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 pinion, possible cause
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.
2. Remove the carrier cover bolts.Backlash : 0.13 - 0.18 mm (0.0051 - 0.0070 in)
If the backlash is greater than specification:
Make side bearing adjusting washer thicker on drive
gear back side, and side bearing adjusting washer
thinner on drive gear tooth side by the same amount.
Refer to RFD-32, "
Inspection and Adjustment".
If the backlash is less than specification:
Make side bearing adjusting washer thinner on drive
gear back side, and side bearing adjusting washer
thicker on drive gear tooth side by the same amount.
Refer to RFD-32, "
Inspection and Adjustment".
SPD513
Runout limit : 0.08 mm (0.0031 in) or less
WDIA0231E
Tool numbers A: KV40104100 ( — )
B: ST36230000 (J-25840-A)

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