Infiniti M35/M45 Y50. Manual — part 767
FRONT FINAL DRIVE ASSEMBLY
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FFD
Disassembly and Assembly
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COMPONENTS
1.
Drive pinion lock nut
2.
Companion flange
3.
Front oil seal
4.
Pinion front bearing
5.
Drive pinion bearing adjusting
washer
6.
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)
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FRONT FINAL DRIVE ASSEMBLY
ASSEMBLY INSPECTION AND ADJUSTMENT
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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 opera-
tion of the bearing.
3.
Measure total preload with preload gauge.
NOTE:
Total preload torque = Pinion bearing preload torque + Side
bearing preload torque
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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.
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
and the followings for the symbols in the figure.
:
Apply gear oil.
:
Apply anti-corrosion oil.
:
Apply Genuine Silicone RTV or equivalent. Refer to
GI-47, "Recommended Chemical Products and Sealants"
:
Apply Genuine Medium Strength Thread Locking Sealant or equivalent. Refer to
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 large
On pinion bearings:
Decrease the drive pinion bearing adjusting washer and drive pinion
adjusting washer thickness. Refer to
FFD-36, "Drive Pinion Adjusting Washer"
On side bearings:
Increase the side bearing adjusting shim thickness. Refer to
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-36, "Drive Pinion Adjusting Washer"
On side bearings:
Decrease the side bearing adjusting shim thickness. Refer to
FRONT FINAL DRIVE ASSEMBLY
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FFD
Drive Gear Runout
1.
Remove carrier cover. Refer to
FFD-20, "Differential Assembly"
2.
Fit a dial indicator to the drive gear back face.
3.
Rotate the drive gear to measure runout.
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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.
Tooth Contact
1.
Remove carrier cover. Refer to
FFD-20, "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.
Runout limit:
0.05 mm (0.0020 in)
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SPD357
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FRONT FINAL DRIVE ASSEMBLY
4.
If tooth contact is improperly adjusted, follow the procedure
below to adjust the pinion height (dimension X).
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