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.

 
 Judging When to Change Transmission Oil by Oil Temperature

  • When consulting with the customer about the transmission oil temperature during driving to determining oil change time
    Transmission oil temperature while driving
    Interval of transmission oil change
    Not exceeding 110°C (230°F)
    Every 30,000 km (18,000 miles) in common with normal driving
    From 110°C (230°F) – 140°C (284°F)
    Every 3,000 km (1,800 miles) in common with sports driving
    Higher than 140°C (284°F)
    Immediately change transmission oil and differential gear oil (front & rear)
    ■ CAUTION ■
    Since the temperature of differential gear oil (front & rear) usually increases concurrently, be sure to change both transmission oil and differential gear oil (front & rear). Refer to Draining (GT-R certified NISSAN dealer) (front differential gear oil), Draining (GT-R certified NISSAN dealer) (rear differential gear oil).

  • When determining oil change time by using CONSULT-III
    1.Turn ignition switch ON.
    2.Select “SHOW OIL TEMP HISTORY” in “Work support”.
    3.Compare the frequency in Oil Temperature Group 3 and Group 4.
    4.When the frequency in Oil Temperature Group 4 is 5% more than that in Group 3, the driving condition is judged as sports driving.
    5.If Oil Temperature Group 5 has at least one count, then it is required to change transmission oil and differential gear oil (front & rear).
    NOTE:
    Transmission oil temperature may increase under traffic congestion with high temperatures. It is necessary to check with the customer for the driving method and recommend changing transmission oil or both transmission oil and differential gear oil (front & rear).