Infiniti M35/M45 Y50. Manual - part 770

FRONT FINAL DRIVE ASSEMBLY

FFD-27

FFD

If the turning torque is outside the specification, use a thicker/
thinner side bearing adjusting shim to adjust. Refer to

FFD-36,

"Side Bearing Adjusting Shim"

10. Record the total amount of shim thickness required for the cor-

rect carrier side bearing preload.

Pinion Gear Height

If the hypoid gear set has been replaced, select the pinion height adjusting washer.

Use the formula below to calculate pinion height adjusting
washer thickness.

Select the proper pinion height adjusting washer. Refer to

FFD-36, "Pinion Height Adjusting Washer"

If impossible find the desired thickness of washer, use washer with thickness closest to the calculated
value.

Pinion Bearing Preload

●

Assemble the drive pinion parts if they are disassembled. Refer to

FFD-28, "Drive Pinion Assembly"

Make sure all parts are clean. Also, make sure the bearings are well lubricated with gear oil.

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).

If the turning torque is less than the specified range:

Decrease the side bearing adjusting shim thickness.

If the turning torque is greater than the specification:

Increase the side bearing adjusting shim thickness.

SPD772

Washer selection equation:

T = T

+ (t

- t

)

Correct washer thickness

Removed washer thickness

Old drive pinion head letter “H

0.01”

(“H”: machined tolerance 1/100 mm

100)

New drive pinion head letter “H

0.01”

(“H”: machined tolerance 1/100 mm

100)

Example:

T = 3.21 + [(2

0.01) - (-1

0.01)] = 3.24

3.21

-1

Example:

Calculated value... T = 3.22 mm

Used washer... T = 3.21 mm

SDIA0249J

PDIA0799J

FFD-28

FRONT FINAL DRIVE ASSEMBLY

Temporarily tighten removed drive pinion lock nut to drive pinion.

NOTE:
Use removed drive pinion lock nut only for the preload measure-
ment.

Rotate drive pinion at least 20 times to check for smooth opera-
tion of the bearing.

Tighten to drive pinion lock nut, while adjust pinion bearing pre-
load 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.

If the pinion bearing preload torque is outside the specification,
use a thicker/thinner drive pinion bearing adjusting washer and drive pinion adjusting washer to adjust.
Refer to

FFD-36, "Drive Pinion Bearing Adjusting Washer"

and

FFD-36, "Drive Pinion Adjusting Washer"

Remove companion flange, after adjustment.

ASSEMBLY
Drive Pinion Assembly

Install pinion front and rear bearing outer races using drifts.

CAUTION:

●

At first, using a hammer, tap bearing outer race until it
becomes flat to gear carrier.

●

Do not reuse pinion front and rear bearing outer race.

Tool number

A: ST3127S000 (J-25765-A)

Drive pinion lock nut tightening torque:

127.4 - 245.0 N·m (13.0 - 25.0 kg-m, 94 - 181 ft-lb)

Pinion bearing preload:

0.78 - 1.57 N·m (0.08 - 0.16 kg-m, 7 - 13 in-lb)

When the preload torque is large:

Decrease the drive pinion bearing adjusting washer and drive pinion adjusting
washer thickness.

When the preload is small:

Increase the drive pinion bearing adjusting washer and drive pinion adjusting
washer thickness.

PDIA0802J

Tool number

A: ST37820000 (

—

)

PDIA0803J

FRONT FINAL DRIVE ASSEMBLY

FFD-29

FFD

Temporarily install pinion height adjusting washer (1).

When hypoid gear set has been replaced

●

Select pinion height adjusting washer. Refer to

FFD-27, "Pin-

ion Gear Height"

When hypoid gear set has been reused

●

Temporarily install the removed pinion height adjusting
washer or same thickness washer to drive pinion.

Install selected pinion height adjusting washer (2) to drive pin-
ion. Press pinion rear bearing inner race (1) to it, using drift.

CAUTION:

●

Pay attention to the direction of pinion height adjusting
washer. (Assemble as shown in the figure.)

●

Do not reuse pinion rear bearing inner race.

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

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:

Do not 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.

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

FFD-27, "Pinion Bearing Preload"

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

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.

PDIA0971E

Tool number

A: ST30032000 (J-26010-01)

PDIA0805J

PDIA0681E

PDIA0807J

Tool number

A: ST33400001 (J-26082)

B: KV38102510 (

—

)

PDIA0808J

FFD-30

FRONT FINAL DRIVE ASSEMBLY

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:

Do not reuse drive pinion lock nut.

12. Tighten to drive pinion lock nut, while adjust pinion bearing pre-

load 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