Nissan Frontier D22. Manual - part 725

FRONT FINAL DRIVE ASSEMBLY

FFD-17

C

E

F

G

H

I

J

K

L

M

A

B

FFD

2.

Loosen ring gear bolts in a crisscross pattern.

3.

Tap ring gear off the differential case with a soft hammer.

●

Tap evenly all around to keep ring gear from binding.

4.

Punch off pinion mate shaft lock pin from differential case.

●

Lock pin is caulked at pin hole mouth on differential case.

DISASSEMBLY OF DIFFERENTIAL SIDE SHAFT

1.

Cut front axle bearing collar with cold chisel. 

CAUTION:

Be careful not to damage differential side shaft.

SPD024

SPD025

SPD236A

FFD-18

FRONT FINAL DRIVE ASSEMBLY

2.

Reinstall differential side shaft into extension tube and secure
with bolts. Remove front axle bearing by drawing out differential
side shaft from front axle bearing with puller.

3.

Remove grease seal.

4.

Remove extension tube retainer.

5.

Remove oil seal.

INSPECTION
Ring gear and drive pinion

Check gear teeth for scoring, cracking or chipping. If any damaged part is evident, replace ring gear and drive
pinion as a set (hypoid gear set).

SPD672

SPD647

SPD781

FRONT FINAL DRIVE ASSEMBLY

FFD-19

C

E

F

G

H

I

J

K

L

M

A

B

FFD

Differential case assembly

Check mating surfaces of differential case, side gears, pinion mate
gears, pinion mate shaft and thrust washers.

Bearing

1.

Thoroughly clean bearing.

2.

Check bearing for wear, scratches, pitting or flaking.
Check tapered roller bearing for smooth rotation. If damaged,
replace outer race and inner cone as a set.

ADJUSTMENT OF DIFFERENTIAL CASE ASSEMBLY

For quiet and reliable final drive operation, the following five adjustments must be made correctly:

1.

Side bearing preload. Refer to 

FFD-19, "SIDE BEARING PRELOAD"

 .

2.

Pinion gear height. Refer to 

FFD-21, "DRIVE PINION GEAR HEIGHT AND PINION BEARING PRE-

LOAD"

 .

3.

Pinion bearing preload. Refer to 

FFD-21, "DRIVE PINION GEAR HEIGHT AND PINION BEARING PRE-

LOAD"

 .

4.

Ring gear to drive pinion backlash. Refer to 

FFD-33, "Total Preload Adjustment"

 .

5.

Ring and pinion gear tooth contact pattern. Refer to 

FFD-25, "TOOTH CONTACT"

 .

SIDE BEARING PRELOAD

NOTE:
A selection of carrier side bearing adjusting washers are required for
successful completion of this procedure.

1.

Make sure all parts are clean and that the bearings are well
lubricated with light oil or “DEXRON

TM

 ” automatic transmission

fluid or equivalent. Refer to 

MA-12, "RECOMMENDED FLUIDS

AND LUBRICANTS"

 .

2.

Place the differential carrier assembly, with side bearings and
bearing races installed, into the final drive housing.

SPD097AA

SPD715

SPD527

FFD-20

FRONT FINAL DRIVE ASSEMBLY

3.

Put the side bearing spacer in place.

CAUTION:

Side bearing spacer is placed on either the right or left
depending upon final drive gear ratio. Be sure to replace it
on the correct side.

4.

Install original side bearing adjusting shims on the differential
case assembly end, opposite the ring gear using Tool.

5.

Install the side bearing caps in their correct locations and tighten
the bearing cap bolts.

6.

Turn the differential case assembly several times to seat the
bearings.

7.

Measure the differential case assembly turning resistance at the
ring gear bolts using Tool.

8.

If the differential case assembly turning resistance is not within
the specification range, increase or decrease the total thickness
of the side bearing adjusting shims until the turning resistance is
correct. If the turning resistance is less than the specified range,
install side bearing adjusting shims of greater thickness; if the
turning resistance is greater than the specification, install thinner
side bearing adjusting shims. Refer to 

FFD-33, "Side Bearing

Adjustment"

 .

9.

Record the total amount of side bearing adjusting shim thick-
ness required for the correct side bearing preload.

SPD894

Tool number

: KV38100600 (J25267)

SPD986

Bearing cap 
bolts

: 88 - 98 N·m (9 - 10 kg-m, 65 - 72 ft-lb)

SPD526

Differential 
case assem-
bly turning 
resistance

: 34.3 - 39.2 N (3.5 - 4.0 kg, 7.7 - 8.8 lb) 
of pulling force at the ring gear bolt

Tool number

(J8129)

WDIA0013E

SPD772