Nissan GT-R. Instruction - part 80

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< PRECAUTION >

[REAR FINAL DRIVE]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Working Range at a Regular Dealership

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CAUTION:

The service items unmentioned on this instruction are recommended to be performed by a GT-R certified
NISSAN dealer. Because those service items require special equipment and a GT-R certified technical
staff who completed special training.

Aluminum Die-Casting Parts Handling

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PROHIBITION OF WELDING OR BEATING REPAIR

• Material made of aluminum die-casting parts is heat-treated and looses strength when being exposed to

welding heat. Do not perform welding repair for cracks, damage or others.

• For aluminum die-casting parts deformation, do not perform repair by beating. Always repair by replacement

as an assembly.

CRACK CHECK

When the vehicle is damaged, always perform a visual deformation check and a crack check.

Crack Check Procedures

For a crack check, use dye penetrant inspection fluid (pre-cleaning fluid, penetrant fluid and developer fluid).

CAUTION:

Always perform a crack check in accordance with the procedures specified by the manufacturer of the
dye penetrant inspection fluid.
1.

Spray pre-cleaning fluid on the checking surface for cleaning.

2.

Spray penetrant fluid on the checking surface and wait until the penetrant fluid soaks into any cracks.

3.

Wipe off excessive penetrant fluid, and then also lightly wipe off penetrant fluid using a wet cloth.

4.

Spray developer fluid on the checking surface.

5.

Cracks, if any, are dyed red in color.

STRAY CURRENT CORROSION

• Corrosion occurs to aluminum die-casting parts by the stray current corrosion phenomenon, when directly

contacting other parts made of steel. Always apply anti-stray current corrosion paint (primer) on the mount-
ing surface.

• Clean mounting surface to prevent any foreign matter, steel powder or others from being mixed in. Always

apply the specified adhesive when installing.

• Corrosion by stray current corrosion may occur when installing with any other bolts than the specified bolt.

Always use the specified bolt that is surface treated.

• When loosening the specified bolt that is tightened, the treated surface may peel. Never reuse the specified

bolt that is tightened once.

TIGHTENING TORQUE CONTROL

Material made of aluminum die-casting parts is soft in term of hardness. Tightening torque must be controlled
exactly as specified. Always use a torque wrench to install any part to the specified tightening torque.

WARNING:

Never use a power tool to remove or tighten bolts for aluminum die-casting part to prevent damage to
aluminum die-casting parts.

REAR DIFFERENTIAL GEAR OIL

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< PERIODIC MAINTENANCE >

[REAR FINAL DRIVE]

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PERIODIC MAINTENANCE

REAR DIFFERENTIAL GEAR OIL

Inspection

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OIL LEAKAGE

• Visually check final drive assembly surrounding area for smears

and leakage of differential gear oil.

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< PERIODIC MAINTENANCE >

[REAR FINAL DRIVE]

REAR DIFFERENTIAL GEAR OIL

*1: When the oil drops

*2: If oil leakage is detected, perform necessary procedures, check for oil leakage, and adjust oil level to the proper level.

*3: When the oil does not drop

• Visually check transmission assembly surrounding area (oil seal, drain plug, filler plug, transmission case,

etc.) for smears and leakage of transmission oil. Refer to 

TM-10, "Inspection"

.

OIL LEVEL

CAUTION:

Oil volume cannot be checked by oil level height.
1.

Remove filler plug (1) and gasket.

CAUTION:

Never start engine while checking oil level.

2.

Insert wire (A) etc. from filler plug mounting hole to confirm if the
oil attaches.
• If oil does not attach at the end of the wire, confirm that there

is not leakage, then refill the oil. (This work is recommended to
be performed by GT-R certified NISSAN dealer.)

CAUTION:

Prevent foreign matter from getting into final drive.

3.

Set a gasket on filler plug and install it on final drive, and then
tighten to the specified torque.

Status

Parts

Required operation

Leakage

*1, 2

Transmission assembly 
(on-board/single unit)

A: Filler plug

1.

Replace gasket.

2.

If oil leakage continues even after replace the transmission as-
sembly. (This work is recommended to be performed by GT-R 
certified NISSAN dealer.)

B: Side cover

Replace the transmission assembly. (This work is recommended to be 
performed by GT-R certified NISSAN dealer.)

C: Oil seal

Replace side oil seal. (This work is recommended to be performed by 
GT-R certified NISSAN dealer.)

CAUTION:

Always replace side oil seal together with side flange. (If side oil 
seal is abnormal, then side flange may also be abnormal.)

D: Drain plug

1.

Replace gasket.

2.

If oil leakage continues even after replace the transmission as-
sembly. (This work is recommended to be performed by GT-R 
certified NISSAN dealer.)

E: Guide hole

1.

Replace side oil seal (left side). (This work is recommended to be 
performed by GT-R certified NISSAN dealer.)

CAUTION:

Always replace side oil seal (left side) together with side 
flange (left side). [If side oil seal (left side) is abnormal, then 
side flange (left side) may also be abnormal.]

2.

If oil leakage continues even after replacing side oil seal, check 
guide hole. If guide hole is abnormal, replace transmission as-
sembly. (This work is recommended to be performed by GT-R 
certified NISSAN dealer.)

F: Air vent

Replace the transmission assembly. (This work is recommended to be 
performed by GT-R certified NISSAN dealer.)

Transmission assembly 
(single unit)

G: Breather

Clean and wipe spouted oil with a part cleaner. Fill with oil to the spec-
ified oil level, if necessary.

Smears

*3

Each part on the final drive assembly, includ-
ing the parts requiring oil leakage check.

Use part cleaner or the equivalent to wipe out smeared oil. Then, check 
for oil leakage.

Standard

Filler plug tightening 
torque

: 34.5 N·m (3.5 kg-m, 25 ft-lb)

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REAR DIFFERENTIAL GEAR OIL

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< PERIODIC MAINTENANCE >

[REAR FINAL DRIVE]

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CAUTION:

Never reuse gasket.