Infiniti FX35, FX50 (S51). Manual - part 585

DRIVE PINION

DLN-175

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: F160A]

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Disassembly

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1.

Remove differential case assembly. Refer to 

DLN-159, "Disassembly"

.

2.

Remove drive pinion lock nut with a flange wrench.

3.

Put matching mark (B) on the end of drive pinion. The matching
mark should be in line with the matching mark (A) on companion
flange (1).

CAUTION:

For matching mark, use paint. 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.

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 defense

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 seal

38. Side shaft

A: 

Oil seal lip

B:

Screw hole

: Apply gear oil.

: Apply anti-corrosion oil.

: Apply multi-purpose grease.

: Apply Genuine Silicone RTV or equivalent. Refer to 

GI-16, "Recommended Chemical Products and Sealants"

.

:

Apply Genuine Medium Strength Thread Locking Sealant or equivalent. Refer to 

GI-16, "Recommended Chemical Prod-

ucts and Sealants"

.

Refer to 

GI-4, "Components"

 for symbols not described above.

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DLN-176

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: F160A]

DRIVE PINION

4.

Remove companion flange using the suitable puller.

5.

Press drive pinion assembly out of gear carrier.

CAUTION:

Never drop drive pinion assembly.

6.

Remove front oil seal.

7.

Remove pinion front bearing inner race.

8.

Remove drive pinion bearing adjusting washer and drive pinion
adjusting washer.

9.

Remove pinion rear bearing inner race and pinion height adjust-
ing washer with replacer (A) (commercial service tool).

10. Tap pinion front/rear bearing outer races uniformly a brass rod or

equivalent to removed.

CAUTION:

Never damage gear carrier.

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DRIVE PINION

DLN-177

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: F160A]

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Assembly

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1.

Install pinion front and rear bearing outer races using drift (A)
[SST: ST37820000 (

—

)].

CAUTION:

• At first, using a hammer, tap bearing outer race until it

becomes flat to gear carrier.

• Never reuse pinion front and rear bearing outer race.

2.

Temporarily install pinion height adjusting washer (1).

When hypoid gear set has been replaced

• Select pinion height adjusting washer. Refer to 

DLN-179,

"Adjustment"

.

When hypoid gear set has been reused

• Temporarily install the removed pinion height adjusting washer

or same thickness washer to drive pinion.

CAUTION:

• Pay attention to the direction of pinion height adjusting

washer. (Assemble as shown in the figure.)

• Never reuse pinion rear bearing inner race.

3.

Install pinion rear bearing inner race (1) to drive pinion with the
drift (A) [SST: ST30032000 (J-26010-01)].

4.

Temporarily assemble removed drive pinion adjusting washer
and drive pinion bearing adjusting washer or same thickness of
them to drive pinion.

5.

Apply gear oil to pinion rear bearing, and assemble drive pinion
into gear carrier.

6.

Apply gear oil to pinion front bearing, and assemble pinion front
bearing inner race to drive pinion assembly.

CAUTION:

Never reuse pinion front bearing inner race.

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DLN-178

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: F160A]

DRIVE PINION

7.

Using suitable spacer (A), press the pinion front bearing inner
race to drive pinion as far as drive pinion nut can be tightened.

8.

Adjust pinion bearing preload. If necessary, select the appropri-
ate drive pinion adjusting washer and drive pinion bearing
adjusting washer. Refer to 

DLN-179, "Adjustment"

.

9.

Using the drifts, install front oil seal as shown in figure.

CAUTION:

• Never reuse oil seal.
• When installing, never incline oil seal.
• Apply multi-purpose grease onto oil seal lips, and gear oil

onto the circumference of oil seal.

10. Install companion flange (1).

NOTE:
When reusing drive pinion, align the matching mark (B) of drive
pinion with the matching mark (A) of companion flange, and then
install companion flange (1).

11. Apply anti-corrosion oil to the thread and seat of new drive pin-

ion lock nut, and temporarily tighten drive pinion lock nut to drive
pinion.

CAUTION:

Never reuse drive pinion lock nut.

12. Tighten to drive pinion lock nut, while adjusting pinion bearing

preload torque.

CAUTION:

• Adjust to the lower limit of the drive pinion lock nut tight-

ening torque first.

• After adjustment, rotate drive pinion back and forth 2 to 3

times to check for unusual noise, rotation malfunction,
and other malfunctions.

13. Install differential case assembly. Refer to 

DLN-162, "Assem-

bly"

.

CAUTION:

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A: Drift [SST: ST33400001 (J-26082)]

B: Drift [SST: KV38102510 (

—

)]

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A: Preload gauge [SST: ST3127S000 (J-25765-A)]

Standard

Pinion bearing preload

: Refer to 

DLN-182, "Pre-

load Torque"

.

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