Infiniti QX56 (JA60). Manual — part 326
FRONT FINAL DRIVE
DLN-227
< DISASSEMBLY AND ASSEMBLY >
[FRONT FINAL DRIVE: M205]
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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 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
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 particular gear set. This dimension is controlled by a
selective drive pinion height adjusting washer between the 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 mounting 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
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
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 front bearing outer race using Tools.
3. Select drive pinion height adjusting washer.
OLD DRIVE
PINION
MARKING
NEW DRIVE PINION MARKING mm (in)
-10 (-4)
-8 (-3)
-5 (-2)
-3 (-1)
0 (0)
+3 (+1)
+5 (+2)
+8 (+3)
+10 (+4)
+10 (+4)
+0.20
(+0.008)
+0.18
(+0.007)
+0.15
(+0.006)
+0.13
(+0.005)
+0.10
(+0.004)
+0.08
(+0.003)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
+8 (+3)
+0.18
(+0.007)
+0.15
(+0.006)
+0.13
(+0.005)
+0.10
(+0.004)
+0.08
(+0.003)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
+5 (+2)
+0.15
(+0.006)
+0.13
(+0.005)
+0.10
(+0.004)
+0.08
(+0.003)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
+3 (+1)
+0.13
(+0.005)
+0.10
(+0.004)
+0.08
(+0.003)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
-0.08
(-0.003)
0 (0)
+0.10
(+0.004)
+0.08
(+0.003)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
-0.08
(-0.003)
-0.10
(-0.004)
-3 (-1)
+0.08
(+0.003)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
-0.08
(-0.003)
-0.10
(-0.004)
-0.13
(-0.005)
-5 (-2)
+0.05
(+0.002)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
-0.08
(-0.003)
-0.10
(-0.004)
-0.13
(-0.005)
-0.15
(-0.006)
-8 (-3)
+0.02
(+0.001)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
-0.08
(-0.003)
-0.10
(-0.004)
-0.13
(-0.005)
-0.15
(-0.006)
-0.18
(-0.007)
-10 (-4)
0
(0)
-0.02
(-0.001)
-0.05
(-0.002)
-0.08
(-0.003)
-0.10
(-0.004)
-0.13
(-0.005)
-0.15
(-0.006)
-0.18
(-0.007)
-0.20
(-0.008)
Tool number
A: ST30901000 ( — )
B: KV40105230 ( — )
SDIA2251E
Tool number
A: ST35271000 ( — )
B: KV40104810 ( — )
SDIA2252E
FRONT FINAL DRIVE
DLN-229
< DISASSEMBLY AND ASSEMBLY >
[FRONT FINAL DRIVE: M205]
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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
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 nut. Then adjust the
drive pinion lock nut tightening torque using suitable 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
.
• 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, rota-
tion 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
B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque
: Refer to
DLN-234, "Inspection and Adjust-
WDIA0382E
SDIA0193J
SDIA2025E
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