2005 INFINITI FX35 differential

REAR FINAL DRIVE ASSEMBLY RFD-17
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Revision: 2005 July 2005 FX
ASSEMBLY INSPECTION AND ADJUSTMENT

Before inspection and adjustment, drain gear oil.
Total Preload Torque
1. Secure final drive assembly onto an attachment.
2. Remove side flanges.
3. Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
4. Rotate drive pinion at least 20 times to check for smooth opera- tion of the bearing.
5. Measure total preload with the preload gauge.
NOTE:
Total preload torque = Pinion bearing torque + Side bearing
torque

If measured value is out of the specification, disassemble it to
check and adjust each part. Adjust the pinion bearing preload and side bearing preload.
Adjust the pinion bearing preload first, then adjust the side bearing preload.
Drive Gear Runout
1. Remove rear cover. Refer to RFD-21, "Differential Assembly" .
2. Fit a dial indicator to the drive gear back face.
3. Rotate the drive gear to measure runout.

If the runout is outside of the repair limit, check drive gear
assembly condition; foreign material may be caught between
drive gear and differential case, or differential case or drive gear
may be deformed, etc.
CAUTION:
Replace drive gear and drive pinion gear as a set. Tool number : KV38100800 (J-25604-01)
Tool number : ST3127S000 (J-25765-A)
Total preload torque (With oil seal): 2.85 - 3.75 N·m (0.29 - 0.38 kg-m, 26 - 33 in-lb)
SDIA1007E
When the preload torque is large On pinion bearings: Replace the collapsible spacer.
On side bearings: Use thinner side bearing adjusting washers by the same amount to each side. Refer to RFD-37, "
Side Bearing Adjusting Washer" .
When the preload is small On pinion bearings: Tighten the drive pinion nut.
On side bearings: Use thicker side bearing adjusting washers by the same amount to each side. Refer to RFD-37, "
Side Bearing Adjusting Washer" .
Runout limit: 0.05 mm (0.0020 in) or less
SPD886

RFD-18
REAR FINAL DRIVE ASSEMBLY
Revision: 2005 July 2005 FX
Tooth Contact
1. Remove rear cover. Refer to RFD-21, "Differential Assembly" .
2. Apply red lead to drive gear. CAUTION:
Apply red lead to both the faces of 3 to 4 gears at 4 loca-
tions evenly spaced on drive gear.
3. Rotate drive gear back and forth several times, check drive pin- ion gear to drive gear tooth contact.
CAUTION:
Check tooth contact on drive side and reverse side.
SPD357
SDIA0570E
SDIA0207E

REAR FINAL DRIVE ASSEMBLY RFD-19
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Revision: 2005 July 2005 FX
4. If tooth contact is improperly adjusted, follow the procedure
below to adjust the pinion height (dimension X).

If the tooth contact is near the face (face contact), or near the
heel (heel contact), thicken pinon height adjusting washers to
move drive pinion closer to drive gear.
Refer to RFD-37, "
Pinion Height Adjusting Washer" .

If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), thin pinion height adjusting washers to move
drive pinion farther from drive gear.
Refer to RFD-37, "
Pinion Height Adjusting Washer" .
Backlash
1. Remove rear cover. Refer to RFD-21, "Differential Assembly" .
2. Fit a dial indicator to the drive gear face to measure the back- lash.

If the backlash is outside of the specified value, change the
thickness of side bearing adjusting washer.
CAUTION:
Do not change the total amount of washers as it will change the bearing preload.
SDIA0517E
PDIA0440E
PDIA0441E
Backlash: 0.10 - 0.15 mm (0.0039 - 0.0059 in)
When the backlash is large: Make drive gear back side adjusting washer thicker,
and drive gear tooth side adjusting washer thinner by
the same amount. Refer to RFD-37, "
Side Bearing
Adjusting Washer" .
When the backlash is small: Make drive gear back side adjusting washer thinner,
and drive gear tooth side adjusting washer thicker by
the same amount. Refer to RFD-37, "
Side Bearing
Adjusting Washer" .
SPD513

REAR FINAL DRIVE ASSEMBLY RFD-21
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Revision: 2005 July 2005 FX
DISASSEMBLY
Differential Assembly
1. Drain gear oil, if necessary.
2. Remove side flange.
3. Remove rear cover mounting bolts.
4. Remove rear cover to insert the seal cutter between gear carrier and rear cover.
CAUTION:

Be careful not to damage the mating surface.

Do not insert flat-bladed screwdriver, this way damage
the mating surface.
5. Using two 45 mm (1.77 in) spacers, mount carrier on the attach- ment.
6. For proper reinstallation, paint matching marks on one side of the bearing cap.
CAUTION:

For matching mark, use paint. Do not damage bearing
caps and gear carrier.

Bearing caps are line-board during manufacture. The
matching marks are used to reinstall them in their origi-
nal positions.
7. Remove bearing caps. Tool number : KV10111100 (J-37228)
PDIA0491E
Tool number : KV38100800 (J-25604-01)
SDIA1008E
SDIA1795E
S-PD343

RFD-22
REAR FINAL DRIVE ASSEMBLY
Revision: 2005 July 2005 FX
8. Lift differential case assembly out with a suitable tool.

Keep side bearing outer races together with inner race. Do
not mix them up.
Also, keep side bearing adjusting washers together with bear-
ings.
9. Remove side bearing inner race. To prevent damage to bearing, engage puller jaws in groove.
CAUTION:

To prevent damage to the side bearing and drive gear,
place copper plates between these parts and vise.

It is not necessary to remove side bearing inner race
except it is replaced.
10. For proper reinstallation, paint matching mark on one differential case assembly.
CAUTION:
For matching mark, use paint. Do not damage differential
case and drive gear.
11. Remove drive gear mounting bolts.
12. Tap drive gear off differential case assembly with a soft hammer. CAUTION:
Tap evenly all around to keep drive gear from bending.
PDIA0547E
SPD527
Tool number A: ST33051001 (J-22888-20)
B: ST33061000 (J-8107-2)
SPD920
PDIA0496E

REAR FINAL DRIVE ASSEMBLY RFD-23
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Revision: 2005 July 2005 FX
13. Remove lock pin of pinion mate shaft with a punch from drive
gear side.
14. Remove pinion mate shaft.
15. Turn pinion mate gear, then remove pinion mate gear, pinion mate thrust washer, side gear and side gear thrust washer from
differential case.
Drive Pinion Assembly
1. Remove differential assembly. Refer to RFD-21, "Differential Assembly" .
2. Remove drive pinion lock nut with the flange wrench.
SPD025
SDIA0031J
SDIA0032J
Tool number : KV40104000 ( — )
SDIA2054E

REAR FINAL DRIVE ASSEMBLY RFD-25
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Revision: 2005 July 2005 FX
INSPECTION AFTER DISASSEMBLY
Clean up the disassembled parts. Then, inspect if the parts are worn or damaged. If so, follow the measures
below.
ADJUSTMENT AND SELECTION OF ADJUSTING WASHERS
Differential Side Gear Clearance

Assemble the differential parts if they are disassembled. Refer to RFD-32, "Differential Assembly" .
1. Place differential case straight up so that side gear to be mea- sured comes upward.
Content Conditions and Measures
Hypoid gear

If the gear teeth do not mesh or line-up correctly, determine the cause and adjust or replace as nec-
essary.

If the gears are worn, cracked, damaged, pitted or chipped (by friction) noticeably, replace with new
drive gear and drive pinion as a set.
Bearing

If any chipped (by friction), pitted, worn, rusted or scratched mark, or unusual noise from the bearing
is observed, replace as a bearing assembly (as a new set).
Side gear and Pinion mate
gear

If any cracks or damage on the surface of the tooth is found, replace.

If any worn or chipped mark on the contact sides of the thrust washer is found, replace.
Side gear thrust washer and
pinion mate thrust washer

If it is chipped (by friction), damaged, or unusually worn, replace.
Oil seal

Whenever disassembled, replace.

If wear, deterioration of adherence (sealing force lips), or damage is detected on the lips, replace
them.
Differential case

If any wear or crack on the contact sides of the differential case is found, replace.
Companion flange

If any chipped mark (about 0.1 mm, 0.004 in) or other damage on the contact sides of the lips of the
companion flange is found, replace.
PDIA0460E

RFD-26
REAR FINAL DRIVE ASSEMBLY
Revision: 2005 July 2005 FX
2. Using feeler gauge, measure the clearance between side gear
back and differential case at 3 different points, while rotating
side gear. Average the 3 readings, and then measure the clear-
ance of the other side as well.
CAUTION:
To prevent side gear from tilting, insert feeler gauges with
the same thickness from both sides.
3. If the back clearance is outside the specification, use a thicker/ thinner side gear thrust washer to adjust. Refer to RFD-36,
"Side Gear Thrust Washer" .
CAUTION:
Select a side gear thrust washer for right and left individu-
ally.
Side Bearing Preload

Selecting carrier side bearing adjusting washers is required for successful completion of this procedure.
1. Make sure all parts are clean. Also, make sure the bearings are well lubricated with gear oil.
2. Place the differential case, with side bearings and bearing races installed, into gear carrier.
3. Insert left and right original side bearing adjusting washers in place between side bearings and gear carrier. Side gear back clearance specification:
0.2 mm (0.008 in) or less.
(Each gear should rotate smoothly without excessive
resistance during differential motion.)
When the back clearance is large: Use a thicker thrust washer.
When the back clearance is small: Use a thinner thrust washer.
PDIA0576E
SPD527
SPD558