LEAKAGE CHECK Visually check transmission assembly surrounding area (oil seal, drain plug, filler plug, transmission case, etc.) for smears and leakage of transmission oil.

Oil smears/leakage status from transmission assembly | Required operation | Reference
Smears*1 | Smears from each part on the transmission assembly | Use part cleaner or the equivalent to wipe out smeared oil. Then, check for oil leakage. | —
Leakage*2 | Mating surface between oil pan and case | Check the seal surface condition. Replace the oil pan gasket only if there is a non-standard condition. Check for oil leakage. | Exploded View
Park position switch mounting surface | Check the mounting surface condition. Replace the plain washer only if there is not any other malfunctioning condition. Check for oil leakage. | Exploded View (GT-R certified NISSAN dealer)

- Heat exchanger & bracket mounting surface and heat exchanger mounting bolt
- Water hose connection (Engine coolant)

Check the seal surface condition. Replace the O-ring at the location where the oil leakage occurred if there is not any other malfunctioning condition. Check for oil leakage.
Exploded View (GT-R certified NISSAN dealer), Exploded View (GT-R certified NISSAN dealer)
Front oil seal | Check the oil seal mounting surface and sliding surface condition. Replace the front oil seal only if there is not any other malfunctioning condition. Check for oil leakage. | Exploded View (GT-R certified NISSAN dealer)
Drain plug | Replace the drain plug. Check for oil leakage. | Exploded View
Filler plug | Replace the filler plug gasket. Check for oil leakage. | Exploded View

- Transmission harness connector
- Oil seal of parking lever
- Oil seal of companion flange (transmission side) of main propeller shaft assembly

Replace the transmission assembly.
Exploded View (GT-R certified NISSAN dealer)

- 3rd-5th check pin
- Idler bolt
- Plug

Replace the plain washer or O-ring. Check for oil leakage.
Exploded View
Breather | Clean and wipe spouted oil with a part cleaner. Fill with oil to the specified oil level, if necessary. | —

- *1: When the oil does not drop
- *2: When the oil drops

CONDITION CHECK
Remove the filler plug, insert a finger into the filler hole, and judge the oil conditions from the transmission oil applied to the inside of the transmission case.
■ CAUTION ■
Be careful not to cut the finger with edges.

Transmission oil status | Possible cause | Required operation
Varnish-like condition (It is as thick as varnish). | Clutch is burned. | Change the transmission oil. Check the transmission assembly or any other parts on the vehicle.
Milky or cloudy | Water is mixed in the fluid. Example:

- Inflow of engine coolant by internal explosion of heat exchanger
- Inflow of water from breather by flood, etc.

Change the transmission oil. Check for flooded area.
A large amount of metal particles are contained in the fluid. | Sliding portions in the transmission assembly are excessively worn. | Change the transmission oil. Check the transmission assembly operation for any malfunctioning condition.

OIL CHANGE TIMING
Judging When to Change Transmission Oil by Oil Temperature

Transmission oil temperature while driving | Interval of transmission oil change
Not exceeding 120°C (248°F) | Change both transmission oil and differential oil every 30,000 km (18,000 miles)
From 120°C (248°F) – 140°C (284°F) | Change both transmission oil and differential oil every 5,000 km (3,100 miles)
Higher than 140°C (284°F) | Change both transmission oil and differential oil immediately.

How to Check Transmission Oil Temperature History With CONSULT-III

1. Turn ignition switch ON.
2. Select “SHOW OIL TEMP HISTORY” in “Work support” in “TRANSMISSION”.
3. Check transmission oil temperature frequency history to judge the timing of oil change.

- At least one count in “Oil Temperature Frequency 5”: Change both transmission oil and differential oil immediately.
- At least one count in “Oil Temperature Frequency 4”: Change both transmission oil and differential oil ever 5,000 km (3,100 miles).
- No count in both “Oil Temperature Frequency 4” and “Oil Temperature Frequency 5”: Change both transmission oil and differential oil ever 30,000 km (18,000 miles).