Infiniti FX35, FX50 (S51). Manual - part 614

DRIVE PINION

DLN-291

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DLN

Install selected drive pinion height adjusting washer (2) to drive
pinion. Press pinion rear bearing inner race (1) to it, using drift
(A) [SST: ST30022000 (

—

)].

CAUTION:

• Be careful of the direction of pinion height adjusting

washer. (Assemble as shown in the figure.)

• Never reuse pinion rear bearing inner race.

Assemble collapsible spacer to drive pinion.

CAUTION:

Never reuse collapsible spacer.

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

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.

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

Using the drift (A) [SST: ST15310000 (

—

)], install front oil

seal in evenly until it becomes flush with the gear carrier.

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.

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.

PDIA0805J

PDIA0492E

PDIA0762J

PDIA0764J

PDIA0750J

DLN-292

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DRIVE PINION

10. Apply anti-corrosion oil to the thread and seat of drive pinion

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

CAUTION:

Never reuse drive pinion lock nut.

11. Adjust to the drive pinion lock nut tightening torque and pinion

bearing preload torque.

CAUTION:

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

ening torque first.

• If the preload torque exceeds the specified value, replace

collapsible spacer and tighten it again to adjust. Never
loosen drive pinion lock nut to adjust the preload torque.

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

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

12. Install differential case assembly. Refer to

DLN-278, "Assem-

bly"

CAUTION:

Never install rear cover at this timing.

13. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash, and companion

flange runout. Refer to

DLN-282, "Adjustment"

and

DLN-292, "Adjustment"

Recheck above items. Readjust the above description, if necessary.

14. Check total preload torque. Refer to

DLN-282, "Adjustment"

15. Install rear cover. Refer to

DLN-278, "Assembly"

Adjustment

INFOID:0000000005249286

TOOTH CONTACT

Refer to

DLN-282, "Adjustment"

COMPANION FLANGE RUNOUT

Fit a test indicator to the inner side of companion flange (socket
diameter).

Rotate companion flange to check for runout.

If the runout value is outside the runout limit, follow the proce-
dure below to adjust.

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.

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.

If the runout value is still outside of the limit after the check and repair, replace companion flange.

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

Standard

Pinion bearing preload

: Refer to

DLN-294, "Pre-

load Torque"

PDIA0765J

Limit

Companion flange runout

: Refer to

DLN-294, "Com-

panion Flange Runout"

PDIA0490E

DRIVE PINION

DLN-293

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DLN

Inspection After Disassembly

INFOID:0000000005249287

DRIVE GEAR AND DRIVE PINION

• Clean up the disassembled parts.
• If the gear teeth never mesh or line-up correctly, determine the cause and adjust or replace as necessary.
• 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

• Clean up the disassembled parts.
• If any chipped (by friction), pitted, worn, rusted or scratched marks, or unusual noise from the bearing is

observed, replace as a bearing assembly (as a new set).

SIDE GEAR AND PINION MATE GEAR

• Clean up the disassembled parts.
• 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

• Clean up the disassembled parts.
• 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

• Clean up the disassembled parts.
• If any wear or crack on the contact sides of the differential case is found, replace.

COMPANION FLANGE

• Clean up the disassembled parts.
• If any chipped mark [about 0.1 mm, (0.004 in)] or other damage on the contact sides of the lips of the com-

panion flange is found, replace.

DLN-294

< SERVICE DATA AND SPECIFICATIONS (SDS)

[REAR FINAL DRIVE: R230]

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

General Specification

INFOID:0000000005249288

Drive Gear Runout

INFOID:0000000005249289

Unit: mm (in)

Side Gear Clearance

INFOID:0000000005249290

Unit: mm (in)

Preload Torque

INFOID:0000000005249291

Backlash

INFOID:0000000005249292

Unit: mm (in)

Companion Flange Runout

INFOID:0000000005249293

Unit: mm (in)

Applied model

AWD

VK50VE

A/T

Final drive model

R230

Gear ratio

3.538

Number of teeth (Drive gear/Drive pinion)

46 / 13

Oil capacity (Approx.)

(US pt, lmp pt)

1.75 (3 3/4, 3 1/8)

Number of pinion gears

Drive pinion adjustment spacer type

Collapsible

Item

Runout limit

Drive gear back face

0.05 (0.0020) or less

Item

Specification

Side gear back clearance
(Clearance limit between side gear and differential case for adjusting
side gear backlash)

0.20 (0.0079) or less

(Each gear should rotate smoothly without excessive resis-

tance during differential motion.)

Item

Specification

Drive pinion bearing preload torque

1.76

−

2.65 N·m (0.18

−

0.27 kg

−

m, 16

−

23 in-lb)

Side bearing preload torque (reference value determined by drive
gear bolt pulling force)

0.29

−

1.47 N·m (0.03

−

0.14 kg

−

m, 3

−

13 in-lb)

Drive gear bolt pulling force (by spring gauge)

34.2

−

39.2 N (3.5

−

3.9 kg, 7.7

−

8.8 lb)

Total preload torque
(Total preload torque = drive pinion bearing preload torque + Side
bearing preload torque)

2.06

−

4.12 N·m (0.21

−

0.42 kg

−

m, 19

−

36 in-lb)

Item

Specification

Drive gear to drive pinion gear

0.13

−

0.18 (0.0051

−

0.0070)

Item

Runout limit

Outer side of the companion flange

0.08 (0.0031) or less

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