2008 INFINITI FX35 differential

FFD-18
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
1. Drive pinion lock nut 2. Companion flange 3. Front oil seal
4. Pinion front bearing 5. Drive pinion bearing adjusting wash-er6. Drive pinion adjusting washer
7. Gear carrier 8. Pinion rear bearing 9. Pinion height adjusting washer
10. Drive pinion 11. Drive gear 12. Side oil seal (right side)
13. Side retainer 14. O-ring 15. Side bearing adjusting shim
16. Side bearing 17. Differential case 18. Breather connector
19. Dowel pin 20. Filler plug 21. Drain plug
22. Gasket 23. Carrier cover 24. Gear oil defence
25. Side gear thrust washer 26. Side gear 27. Circular clip
28. Pinion mate thrust washer 29. Pinion mate gear 30. Pinion mate shaft
31. Lock pin 32. Side bearing adjusting washer 33. Side oil seal (left side)
34. Side shaft bearing 35. Extension tube retainer 36. Side shaft oil seal
37. Dust sealed 38. Side shaft
A: Oil seal lip
B: Screw hole
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FFD-20
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
ASSEMBLY INSPECTION AND ADJUSTMENT
 Before inspection and adjustment, drain gear oil.
Total Preload Torque
1. Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
2. Rotate drive pinion at least 20 times to check for smooth operation of the bearing.
3. Measure total preload with preload gauge.NOTE:
Total preload torque = Pinion bearing preload torque + Side
bearing preload 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.
16. Side bearing 17. Differential case 18. Breather connector
19. Dowel pin 20. Filler plug 21. Drain plug
22. Gasket 23. Carrier cover 24. Gear oil defence
25. Side gear thrust washer 26. Side gear 27. Circular clip
28. Pinion mate thrust washer 29. Pinion mate gear 30. Pinion mate shaft
31. Lock pin 32. Side bearing adjusting washer 33. Side oil seal (left side)
34. Side shaft bearing 35. Extension tube retainer 36. Side shaft oil seal
37. Dust sealed 38. Side shaft
A: Oil seal lip
B: Screw hole
Refer to GI-8, "
Component" and the followings for the symbols in the figure.
: Apply multi-purpose grease.
: Apply gear oil.
: Apply anti-corrosion oil.
: Apply Genuine Silicone RTV or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
: Apply Genuine Medium Strength Thread Locking Sealant or equivalent. Refer to
GI-44, "
Recommended Chemical Prod-
uct and Sealant".
Tool number A: ST3127S000 (J-25765-A)
Total preload torque:
1.56 - 2.65 N·m (0.16 - 0.27 kg-m, 14 - 23 in-lb)
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When the preload torque is largeOn pinion bearings: Decrease the drive pinion bearing adjusting washer and drive pinion
adjusting washer thickness. Refer to FFD-39, "
Inspection and Adjust-
ment" and FFD-39, "Inspection and Adjustment".
On side bearings: Increase the side bear ing adjusting shim thickness. Refer to FFD-39,
"Inspection and Adjustment".
When the preload torque is small On pinion bearings: Increase the drive pinion bearing adjusting washer and drive pinion
adjusting washer thickness. Refer to FFD-39, "
Inspection and Adjust-
ment" and FFD-39, "Inspection and Adjustment".
On side bearings: Decrease the side bearin g adjusting shim thickness. Refer to FFD-39,
"Inspection and Adjustment".
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FRONT FINAL DRIVE ASSEMBLYFFD-21
< SERVICE INFORMATION >
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Drive Gear Runout
1. Remove carrier cover. Refer to "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 assem-
bly 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 dri ve pinion gear as a set.
Tooth Contact
1. Remove carrier cover. Refer to "Differential Assembly".
2. Apply red lead to drive gear.
CAUTION:
Apply red lead to both the f aces 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 dri ve side and reverse side.
Runout limit: 0.05 mm (0.0020 in)
SPD886
SPD357
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FRONT FINAL DRIVE ASSEMBLYFFD-23
< SERVICE INFORMATION >
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 If the tooth contact is near the face (face contact), or near the heel (heel contact), thicken pinion height adjusting washers to move
drive pinion closer to drive gear.
Refer to FFD-39, "
Inspection and Adjustment".
 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 FFD-39, "
Inspection and Adjustment".
Backlash
1. Remove carrier cover. Refer to "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 thick- ness of side bearing adjusting washer.
Companion Flange Runout
1. Fit a dial indicator onto the companion flange face (inner side of the propeller shaft mounting bolt holes).
2. Rotate companion flange to check for runout.
3. Fit a test indicator to the inner side of companion flange (socket diameter).
4. Rotate companion flange to check for runout.
5. If the runout value is outside the runout limit, follow the procedure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion by 90 ° step, and
search for the position where the runout is the minimum.
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Backlash: 0.10 - 0.15 mm (0.0039 - 0.0059 in)
When the backlash is large:
Decrease side bearing adju sting washer thickness.
Refer to FFD-39, "
Inspection and Adjustment".
When the backlash is small: Increase side bearing adjust ing washer thickness. Re-
fer to FFD-39, "
Inspection and Adjustment".
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Runout limit: 0.18 mm (0.0071 in)
Runout limit: 0.13 mm (0.0051 in)
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FFD-24
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
b. If the runout value is still outside of the limit after the phase has been changed, possible cause will be an
assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.
c. If the runout value is still outside of the limit after the check and repair, replace companion flange.
DISASSEMBLY
Side Shaft Assembly
1. Hold extension tube retainer with puller, then press out side shaft using a press.
2. Remove side shaft oil seal (1) from extension tube retainer with a flat- blade screwdriver.
CAUTION:
Be careful not to damage extension tube retainer.
3. Remove side shaft bearing from extension tube retainer.
4. Remove O-ring from extension tube retainer.
5. Remove dust sealed from side shaft.
Differential Assembly
1. Drain gear oil.
2. Remove carrier cover mounting bolts.
3. Remove carrier cover to insert the seal cutter between gear car- rier and carrier cover.
CAUTION:
 Be careful not to damage the mating surface.
 Never insert flat-bladed screwdriver, this way damage the
mating surface.
4. Remove side retainer.
5. Remove side bearing adjusting shim.
6. Remove O-ring from side retainer.
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Tool number A: KV10111100 (J-37228)
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FRONT FINAL DRIVE ASSEMBLYFFD-25
< SERVICE INFORMATION >
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7. Remove differential case assembly from gear carrier.
8. Remove side oil seal (right side) from side retainer.
9. Remove side bearing outer race with puller.
10. Remove O-ring from gear carrier.
11. Remove side oil seal (left side) from gear carrier.
12. Remove side bearing outer race with puller.
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Tool number A: KV381054S0 (J-34286)
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Tool number A: KV381054S0 (J-34286)
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FFD-26
< SERVICE INFORMATION >
FRONT FINAL DRIVE ASSEMBLY
13. 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.
14. For proper reinstallation, paint matching marks on one differen- tial case assembly.
CAUTION:
For matching marks, use pain t. Never damage differential
case and drive gear.
15. Remove drive gear mounting bolts.
16. Tap drive gear off differential case assembly with a soft hammer. CAUTION:
Tap evenly all around to keep drive gear from bending.
17. Remove lock pin of pinion mate shaft with a punch from drive gear side.
18. Remove pinion mate shaft. Tool number A: ST33051001 (J-22888-20)
B: ST33061000 (J-8107-2)
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FRONT FINAL DRIVE ASSEMBLYFFD-27
< SERVICE INFORMATION >
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19. Turn pinion mate gear, then remove pinion mate gears, pinion mate thrust washers, side gears and side gear thrust washers
from differential case.
Drive Pinion Assembly
1. Remove differential assembly. Refer to "Differential Assembly".
2. Remove drive pinion lock nut with a flange wrench.
3. Put matching mark (B) on the end of drive pinion. The matchingmark should be in line with the matching mark (A) on companion
flange (1).
CAUTION:
For matching mark, use pain t. Never damage companion
flange and drive pinion.
NOTE:
The matching mark (A) on the final drive companion flange (1)
indicates the maximum vertical runout position.
When replacing companion flange, matching mark is not neces-
sary.
4. Remove companion flange using the suitable puller.
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