2006 INFINITI QX56 Factory Service Manual

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Page 2817 of 3383

INFINITI QX56 2006 Factory Service Manual RFD-12
CARRIER COVER
Revision: November 20092006 QX56
CARRIER COVERPFP:38351
Removal and InstallationEDS0044S
REMOVAL
1. Remove the rear final drive assembly. Refer to RFD-13, "Removal and Installatio

Page 2818 of 3383

INFINITI QX56 2006 Factory Service Manual REAR FINAL DRIVE ASSEMBLYRFD-13
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Revision: November 2009 2006 QX56
REAR FINAL DRIVE ASSEMBLYPFP:38300
Removal and InstallationEDS0044T
REMOVAL
1. Remove the spare tire.
2. Dr

Page 2819 of 3383

INFINITI QX56 2006 Factory Service Manual RFD-14
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
7. Place a suitable jack under the rear final drive assembly.
CAUTION:
Do not place the jack on the carrier cover.
8. Remove the nuts

Page 2820 of 3383

INFINITI QX56 2006 Factory Service Manual REAR FINAL DRIVE ASSEMBLYRFD-15
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Revision: November 2009 2006 QX56
Disassembly and AssemblyEDS0044U
COMPONENTS
WDIA0191E

Page 2821 of 3383

INFINITI QX56 2006 Factory Service Manual RFD-16
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
ASSEMBLY INSPECTION AND ADJUSTMENT
Drain the differential gear oil before inspection and adjustment. Refer to RFD-8, "DIFFERENTIAL GE

RFD-16
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
ASSEMBLY INSPECTION AND ADJUSTMENT
Drain the differential gear oil before inspection and adjustment. Refer to RFD-8, "DIFFERENTIAL GEAR
OIL" .
Remove and install the carrier cover as necessary for inspection and adjustment. Refer to RFD-12, "CAR-
RIER COVER" .
Total Preload Torque
1. Remove the side flanges if necessary. Refer to RFD-19, "Side Flange" .
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.
1. Drive pinion lock nut 2. Companion flange 3. Front oil seal
4. Drive pinion front bearing 5. Collapsible spacer 6. Drive pinion rear bearing
7. Drive pinion height adjusting washer 8. Drive pinion 9. Gear carrier
10. Drive gear 11. Pinion mate shaft 12. Lock pin
13. Pinion mate gear 14. Pinion mate thrust washer 15. Side gear
16. Side gear thrust washer 17. Differential case 18. Side bearing
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 specificationOn 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-33, "
Side Bearing Adjusting
Washer" .
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-33, "
Side Bearing Adjust-
ing Washer" .

Page 2822 of 3383

INFINITI QX56 2006 Factory Service Manual REAR FINAL DRIVE ASSEMBLYRFD-17
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Revision: November 2009 2006 QX56
Drive Gear Runout
1. Fit a dial indicator to the drive gear back face.
2. Rotate the drive gear to measure

Page 2823 of 3383

INFINITI QX56 2006 Factory Service Manual RFD-18
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
If the tooth contact is near the face (face contact), or near the
heel (heel contact), use a thicker drive pinion height adjusting
wa

RFD-18
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
If the tooth contact is near the face (face contact), or near the
heel (heel contact), use a thicker drive pinion height adjusting
washers to move the drive pinion closer to the drive gear.
Refer to RFD-33, "
Drive Pinion Height Adjusting Washer" .
If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), use a thinner drive pinion height adjusting
washers to move the drive pinion farther from the drive gear.
Refer to RFD-33, "
Drive Pinion Height Adjusting Washer" .
Backlash
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 thick-
ness 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
PDIA0440E
PDIA0441E
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-33, "
Side Bearing Adjusting Washer" .
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-33, "
Side Bearing Adjusting Washer" .
SPD513
Runout limit : 0.08 mm (0.0031 in) or less
WDIA0231E

Page 2824 of 3383

INFINITI QX56 2006 Factory Service Manual REAR FINAL DRIVE ASSEMBLYRFD-19
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Revision: November 2009 2006 QX56
could be an assembly malfunction of drive pinion and drive pinion bearing or a malfunctioning drive pinion

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