2009 INFINITI QX56 Factory Service Manual

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Page 1281 of 4171

INFINITI QX56 2009 Factory Service Manual
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7. Place a small hole in the front oil seal case using suitable tool.
8. Remove the fr

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INFINITI QX56 2009 Factory Service Manual
DLN-226
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
Drive pinion and drive gear are supplied in matched sets only. Matching numbers on both drive pinion and
drive gear a

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INFINITI QX56 2009 Factory Service Manual
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2. Using feeler gauges, measure the clearance between the side gear back and different

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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 clearanc e 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 DLN-234, "Inspection and Adjustment"
.
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 individually.
NOTE:
Side gear back clearance is clearance between side gear and differential case for adjusting side gear
backlash.
Drive Pinion Height
Drive gear and drive pinion are supplied in matched sets only.
Matching numbers on both drive pinion and drive gear are etched
for verification. If a new gear set is being used, verify the numbers
of each drive pinion and drive gear before proceeding with assem-
bly.
The mounting distance from the centerline of the drive gear to the back face of the drive pinion for the M205
final drive assembly is 103.5 mm (4.0748 inches).
On the button end of each drive pinion, there is etched a plus (+) number, a minus (-) number, or a zero (0),
which indicates the best running position for each partic ular gear set. This dimension is controlled by a
selective drive pinion height adjusting washer between t he drive pinion rear bearing inner race and drive pin-
ion.
For example: If a drive pinion is etched m+8 (+3), it would require 0.08 mm (0.003 inch) less drive pinion
height adjusting washer than a drive pinion etched “0”. This means decreasing drive pinion height adjusting
washer thickness; increases the m ounting distance of the drive pinion to 103.6 mm (4.0778 inches). If a
drive pinion is etched m-8 (-3), it would require adding 0.08 mm (0.003 inch) more to the drive pinion height
adjusting washer than would be required if the drive pinion were etched “0”. By adding 0.08 mm (0.003 inch),
the mounting distance of the drive pinion was decreased to 103.4 mm (4.0718 inches) which is just what a
m-8 (-3) etching indicated.
To change the drive pinion height, use different drive pinion height adjusting washers which come in different thickness.
Use the following tables as a guide for selecting the correct drive pinion height adjusting washer thickness to
add or subtract from the old drive pinion height adjusting washer. Side gear back
clearance
: Refer to
DLN-234, "Inspection
and Adjustment"
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 spec-
ification: Use a thinner side gear thrust washer.
PDIA0576E
SDIA2241E
Revision: December 20092009 QX56

Page 1284 of 4171

INFINITI QX56 2009 Factory Service Manual
DLN-228
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
ASSEMBLY
Drive Pinion Assembly
1. Install drive pinion rear bearing outer race using Tools.
2. Install drive pinion fro

Page 1285 of 4171

INFINITI QX56 2009 Factory Service Manual
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4. Install the selected drive pinion height adjusting washer to the drive pinion. Pres

Page 1286 of 4171

INFINITI QX56 2009 Factory Service Manual
DLN-230
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
10. Apply anti-corrosive oil to the threads of the drive pinion and the
seating surface of the new drive pinion lock nu

Page 1287 of 4171

INFINITI QX56 2009 Factory Service Manual
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4. Install the pinion mate shaft and align the lock pin hole on the pinion mate shaft

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INFINITI QX56 2009 Factory Service Manual
DLN-232
< DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: M205]
FRONT FINAL DRIVE
10. Install side bearing adjusters into gear carrier.
11. Apply differential gear oil to the side bearings, and install

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