Infiniti Q45. Manual - part 774

REAR FINAL DRIVE ASSEMBLY

RFD-33

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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:

Do not 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. Do not
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 

RFD-33, "Differential Assembly"

  .

CAUTION:

Do not install rear cover yet.

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

flange runout. Refer to 

RFD-19, "Drive Gear Runout"

  , 

RFD-20, "Tooth Contact"

  , 

RFD-21, "Backlash"

  ,

RFD-22, "Companion Flange Runout"

  .

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

14. Check total preload torque. Refer to 

RFD-19, "Total Preload Torque"

  .

15. Install rear cover. Refer to 

RFD-33, "Differential Assembly"

  .

Differential Assembly

1.

Install side gear thrust washers with the same thickness as the
ones installed prior to disassembly or reinstall the old ones on
the side gears.

Tool number

A: ST3127S000 (J-25765-A)

Drive pinion lock nut tightening torque:

147 - 323 N·m (15 - 32 kg-m, 109 - 238 ft-lb)

Drive pinion bearing preload:

2.65 - 3.23 N·m (0.27 - 0.32 kg-m, 24 - 28 in-lb)

PDIA0765J

SDIA0193J

RFD-34

REAR FINAL DRIVE ASSEMBLY

2.

Install side gears and thrust washers into differential case.

CAUTION:

Make sure that the circular clip is installed to side gears.

3.

Align 2 pinion mate gears in diagonally opposite positions, then
rotate and install them into differential case after installing thrust
washer to pinion mate gear.

4.

Align the lock pin holes on differential case with shaft, and install
pinion mate shaft.

5.

Measure side gear end play. If necessary, select the appropriate
side gear thrust washers. Refer to 

RFD-26, "Differential Side

Gear Clearance"

  .

6.

Drive a lock pin into pinion mate shaft, using a punch.
Make sure lock pin is flush with differential case.

CAUTION:

Do not reuse lock pin.

7.

Align the matching mark of differential case with the mark of
drive gear, then place drive gear.

8.

Apply thread locking sealant into the thread hole of drive gear.

●

Use Genuine High Strength Thread Locking Sealant or
equivalent. Refer to 

GI-45, "RECOMMENDED CHEMICAL

PRODUCTS AND SEALANTS"

  .

CAUTION:

Drive gear back and threaded holes shall be cleaned and
degreased sufficiently.

SDIA2025E

SDIA0195J

SPD030

SDIA2593E

SDIA2594E

REAR FINAL DRIVE ASSEMBLY

RFD-35

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9.

Install drive gear on the mounting bolts, and then tighten to the
specified torque. Refer to 

RFD-18, "COMPONENTS"

  .

CAUTION:

●

Tighten bolts in a crisscross fashion.

●

After tightening the bolts to the specified torque, tighten
the bolts additionally by turning the bolts 31 to 36
degrees.

10. Press side bearing inner races to differential case, using the drift

and the base.

CAUTION:

Do not reuse side bearing inner race.

11. Install differential case assembly with side bearing outer races

into gear carrier.

12. Measure side bearing preload. If necessary, select the appropri-

ate side bearing adjusting washers. Refer to 

RFD-27, "Side

Bearing Preload"

  .

13. Insert selected left and right side bearing adjusting washers in

place between side bearings and gear carrier.

14. Align matching marks on bearing cap with that on gear carrier.

15. Install bearing caps and tighten bearing cap mounting bolts to

the specified torque. Refer to 

RFD-18, "COMPONENTS"

  .

SDIA0247J

Tool number

A: KV38100300 (J-25523)

B: ST33061000 (J-8107-2)

SPD353

SPD527

SPD558

SDIA1795E

RFD-36

REAR FINAL DRIVE ASSEMBLY

16. Using the drift, drive side oil seals until it becomes flush with the

case end.

CAUTION:

●

Do not reuse oil seal.

●

When installing, do not incline oil seal.

●

Apply multi-purpose grease onto oil seal lips, and gear
oil onto the circumference of oil seal.

17. Check and adjust drive gear runout, tooth contact, drive gear to

drive pinion backlash, and total preload torque. Refer to 

RFD-

19, "Drive Gear Runout"

  , 

RFD-20, "Tooth Contact"

  , 

RFD-21,

"Backlash"

  , 

RFD-19, "Total Preload Torque"

  .

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

18. Apply sealant to mating surface of rear cover.

●

Use Genuine Silicone RTV or equivalent. Refer to 

GI-45,

"RECOMMENDED CHEMICAL PRODUCTS AND SEAL-
ANTS"

  .

CAUTION:

Remove old sealant adhering to mounting surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mounting surfaces.

19. Install rear cover on gear carrier and tighten mounting bolts with

the specified torque. Refer to 

RFD-18, "COMPONENTS"

  .

20. Install side flange with the following procedure.

a.

Attach the protector to side oil seal.

b.

After the side flange is inserted and the serrated part of side
gear has engaged the serrated part of flange, remove the pro-
tector.

c.

Put a suitable drift on the center of side flange, then drive it until
sound changes.

NOTE:
When installation is completed, driving sound of the side flange
turns into a sound which seems to affect the whole final drive.

d.

Confirm that the dimension of the side flange installation (Mea-
surement A) in the figure comes into the following.

Tool number

: KV38100200 (J-26233)

SPD560

PDIA0961E

Tool number

: KV38107900 (J-39352)

SDIA0822E

Measurement A: 326 - 328 mm (12.83 - 12.91 in)

SDIA1039E