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Discussion Starter #1 (Edited)
My car just reached 21k miles and I'm planning to do all fluid changes. Transmission, engine, front and rear differential, and transfer Case Fluid. One thing I can not figure out is the amount of transmission oil required. Some say 3.1qz, but I wanted to ask to confirm. Also can someone explain why there is 2 drain plugs? I was told that FLUSHING the transmission oil will cause slippage. So a fill would be a better alternative? But others say the opposite.


From what most people say, Rear and Front differential fluid should be replaced during 15k-20k miles. But does anyone know the exact amount required to be filled for front and rear?


I know that some of you guys are going to say transmission is "lifetime". But many people disagree and says that its 100k for the life of the transmission without service. This is a long term car, so I'd rather spend that few hundred and be on the safe side. Than to spend thousands later on.
 

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A/T FLUID : Changing
CAUTION:
• Use only recommended ATF. Never mix with other ATF.
• Using ATF other than recommended ATF will cause deterioration in driveability and A/T durability,
and may damage the A/T, which is not covered by the INFINITI new vehicle limited warranty.
• Be sure that ambient temperature is 0C (32F) or more when performing work.
• Always use shop paper. Never use shop cloth.
• When filling ATF, be careful not to scatter heat generating parts such as exhaust.

1. Step 1
a. Install the O-ring (315268E000) (A) to the charging pipe
(310811EA5A) (B).

2. Step 2
a. Park vehicle on level surface and set parking brake.
b. Shift the selector lever to “P” position.
c. Use CONSULT to check that the ATF temperature is 40C (104F) or less.
d. Lift up the vehicle.
e. Remove rear engine cover. Refer to EXT-33, "FLOOR UNDER COVER : Exploded View".
f. Remove the drain plug from the oil pan, then drain the ATF.
g. When the ATF starts to drip, temporarily tighten the drain plug to the oil pan.
NOTE:
Never replace drain plug and drain plug gasket with new ones yet.
h. Remove overflow plug from oil pan. Refer to TM-243, "Exploded View".
i. Install the charging pipe (A) to the overflow plug hole.
CAUTION:
Tighten the charging pipe by hand.
j. Install the bucket pump hose (B) to the charging pipe.
CAUTION:
Insert the bucket pump hose all the way to the end of the
charging pipe.
k. Fill approximately 3 liters (3-1/8 US qt, 2-5/8 lmp qt) of the ATF.
l. Remove the bucket pump hose and the charging pipe, then temporarily
tighten the overflow plug to the oil pan.
CAUTION:
Quickly perform the procedure to avoid ATF leakage from
the oil pan.
NOTE:
Never replace overflow plug with new ones yet.
m. Lift down the vehicle.
n. Set the vehicle to READY in inspection mode 5 state. Refer to TM-9, "Precautions Concerning On-board
Servicing of Hybrid Systems".
o. Start the engine and wait for approximately 3 minutes.
p. Stop the engine.

3. Step 3
a. Repeat “Step 2”.
4. Final Step
a. Use CONSULT to check that the ATF temperature is 40C (104F) or less.
b. Lift up the vehicle.
c. Remove the drain plug from the oil pan, then drain the ATF.
d. When the ATF starts to drip, tighten the drain plug to the oil pan to the specified torque. Refer to TM-243,
"Exploded View".
CAUTION:
Never reuse drain plug and drain plug gasket. Failure to do this may cause the leakage of ATF.
e. Remove overflow plug from oil pan.
f. Install the charging pipe (A) to the overflow plug hole.
CAUTION:
Tighten the charging pipe by hand.
g. Install the bucket pump hose (B) to the charging pipe.
CAUTION:
To prevent leakage of ATF, insert the bucket pump hose all
the way to the end of the charging pipe.
h. Fill approximately 3 liters (3-1/8 US qt, 2-5/8 lmp qt) of the ATF.
i. Remove the bucket pump hose and the charging pipe, then temporarily
tighten the overflow plug to the oil pan.
CAUTION:
Quickly perform the procedure to avoid ATF leakage from the oil pan.
NOTE:
Never replace overflow plug with new ones yet.
j. Lift down the vehicle.
k. For bleeding air from the sub electric oil pump, run the motor continuously for approximately 30 seconds.
For motor running state, refer to HBC-20, "HYBRID CONTROL SYSTEM : System Description".
l. Turn ignition switch OFF.
m. Turn ignition switch ON.
n. Set the vehicle to inspection mode 5 state. Refer to TM-9, "Precautions Concerning On-board Servicing of
Hybrid Systems".
o. Select “Data Monitor” in “TRANSMISSION” with CONSULT.
p. Select “ATF TEMP 1” and “SUB E-OP REVOLUTION”.
q. Check that the “ATF TEMP 1” value is 35C (95F) or less.
r. Set the vehicle to READY.
s. Shift the selector lever through each gear position. Leave selector lever in “P” position.
NOTE:
Hold the lever at each position for 5 seconds.
t. Lift up the vehicle when the ATF temperature reaches 35C (95F), and remove the overflow plug from the
oil pan.
CAUTION:
• Perform this work the vehicle idling.
• Check that the “Data Monitor” “SUB E-OP REVOLUTION” is 0 rpm.
u. When the ATF starts to drip, tighten the overflow plug to the oil pan to the specified torque. Refer to TM-
243, "Exploded View".
CAUTION:
Never reuse overflow plug. Failure to do this may cause the leakage of ATF.
v. Install rear engine cover. Refer to EXT-33, "FLOOR UNDER COVER : Exploded View".
w. Lift up the vehicle.
x. Turn ignition switch OFF.
A/T FLUID : Adjustment
CAUTION:
• Use only recommended ATF. Never mix with other ATF.
• Using ATF other than recommended ATF will cause deterioration in driveability and A/T durability,
and may damage the A/T, which is not covered by the INFINITI new vehicle limited warranty.
• Be sure that ambient temperature is 0C (32F) or more when performing work.
• Always use shop paper. Never use shop cloth.
• When filling ATF, be careful not to scatter heat generating parts such as exhaust.
• Always maintain the ATF temperature within between 30C (86F) and 40C (104F) while checking
with CONSULT when the ATF level adjustment is performed.
1. Park vehicle on level surface and set parking brake.
2. Shift the selector lever to “P” position.
3. When ATF is drained from the oil pan, fill the oil pan with ATF according to the following procedure before
proceeding to Step 4.

a. Lift up the vehicle.
b. Install the O-ring (315268E000) (A) to the charging pipe
(310811EA5A) (B).
c. Remove overflow plug from oil pan. Refer to TM-243, "Exploded
View".
d. Install the charging pipe (A) to the overflow plug hole.
CAUTION:
Tighten the charging pipe by hand.
e. Install the bucket pump hose (B) to the charging pipe.
CAUTION:
To prevent leakage of ATF, insert the bucket pump hose all
the way to the end of the charging pipe.
f. Fill approximately 3 liters (3-1/8 US qt, 2-5/8 lmp qt) of the ATF.
g. Remove the bucket pump hose and the charging pipe, then temporarily
tighten the overflow plug to the oil pan.
CAUTION:
Quickly perform the procedure to avoid ATF leakage from
the oil pan.
NOTE:
Never replace overflow plug with new ones yet.
h. Lift down the vehicle.
i. For bleeding air from the sub electric oil pump, run the motor continuously for approximately 30 seconds.
For motor running state, refer to HBC-20, "HYBRID CONTROL SYSTEM : System Description".
j. Turn ignition switch OFF.
4. Turn ignition switch ON.
5. Set the vehicle to inspection mode 5 state. Refer to TM-9, "Precautions Concerning On-board Servicing of
Hybrid Systems".
6. Select “Data Monitor” in “TRANSMISSION” with CONSULT.
7. Select “ATF TEMP 1” and “SUB E-OP REVOLUTION”.
8. Check that the “ATF TEMP 1” value is 35C (95F) or less.
9. Set the vehicle to READY.
10. Shift the selector lever through each gear position. Leave selector lever in “P” position.
11. Lift up the vehicle.
12. Remove engine under cover rear.
13. Check the ATF leakage from transmission.
14. Install the O-ring (315268E000) (A) to the charging pipe
(310811EA5A) (B).
15. Remove overflow plug from oil pan. Refer to TM-243, "Exploded
View".
16. Install the charging pipe (A) to the overflow plug hole.
CAUTION:
Tighten the charging pipe by hand.
17. Install the bucket pump hose (B) to the charging pipe.
CAUTION:
To prevent leakage of ATF, insert the bucket pump hose all
the way to the end of the charging pipe.
18. Fill approximately 0.5 liters (1/2 US qt, 1/2 lmp qt) of the ATF.
19. Check that the ATF leaks when removing the bucket pump
hose. If the ATF does not leak, refill the ATF.
CAUTION:
• Perform this work the vehicle idling.
• Check that the “Data Monitor” “SUB E-OP REVOLUTION” is 0 rpm.
20. When the ATF starts to drip, remove the charging pipe.
21. Tighten the overflow plug to the oil pan to the specified torque. Refer to TM-243, "Exploded View".
CAUTION:
Never reuse drain plug and drain plug gasket. Failure to do this may cause the leakage of ATF.
22. Install engine under cover rear.
23. Lift down the vehicle.
24. Turn ignition switch OFF.
TRANSFER FLUID
TRANSFER FLUID : Inspection INFOID:0000000009696163
FLUID LEAKAGE
Check transfer surrounding area (oil seal, drain plug, and filler plug etc.) for fluid leakage.
FLUID LEVEL
1. Remove filler plug and gasket. Then check that fluid is filled
up from mounting hole for the filler plug.
CAUTION:
Turn the ignition switch OFF while checking fluid level.
2. Set a new gasket onto filler plug, and install it on transfer and
tighten to the specified torque. Refer to DLN-69, "Exploded
View".
CAUTION:
Never reuse gasket.
TRANSFER FLUID : Draining INFOID:0000000009696164
1. Run the vehicle to warm up the transfer unit sufficiently.
2. Turn the ignition switch OFF, and remove the drain plug to
drain the transfer fluid.
3. Set a new gasket onto drain plug, and install it on the transfer
and tighten to the specified torque. Refer to DLN-69, "Exploded
View".
CAUTION:
Never reuse gasket.
TRANSFER FLUID : Refilling
1. Remove filler plug and gasket. Then fill fluid up to mounting
hole for the filler plug.
CAUTION:
Carefully fill the fluid. (Fill up for approximately 3 minutes.)
2. Leave the vehicle for 3 minutes, and check the fluid level again.
3. Set a new gasket onto filler plug, and install it on transfer and
tighten to the specified torque. Refer to DLN-69, "Exploded
View".
CAUTION:
Never reuse gasket.
 

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You are doing the transmission fluid very early!
I did ours at 50k km and even the service manager says its not required however I told them to do it anyway as I was paying the bill.
 

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This TSB is good for our cars, and makes understanding the maintenance process FAR easier.

http://www.infinitig37.com/TSB/ITB11-036.pdf

Essentially, you;

1. The engine is off and near operating temperature. Loosen both the drain and the fills bolts on the pan.
2. Remove the drain bolt and allow the fluid to drain (about 4 qts).
3. Replace the drain bolt and remove the fill bolt.
4. Install the Nissan transmission fill tool (or equivalent) to the fill port.
5. Pump 4 quarts of Nissan Matic S transmission fluid (or equivalent LV fluid) through the fill port. Seal the fill port quickly.
6. Start the engine and move the transmission gear selector through P, R, N, D, and back through to P, pausing at each for 30 seconds (use the brakes to prevent wheel spin).
7. While the engine is running, open the transmission fill port (some fluid may spill) and reattach the fill tool. Pump an additional quart of fluid into the transmission. Remove the tool and allow the transmission to drain from the fill port to the appropriate level. Seal the fill port when the fluid draining has reduced to a drip.

I have done this twice now on my Q50, using Valvoline Maxlife ATF. Initially, the transmission seems laggy/slipping, but then settles into very smooth operation.
 

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Just changed my transmission oil yesterday on Q50 hybrid at the dealer. it cost me $198. The car really drives differently, it feels smother when shifting gears, quiet rid; it is not "placebo effect", therefore, I suggest Q50 hybrid drivers change transmission oil.
 

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Just changed my transmission oil yesterday on Q50 hybrid at the dealer. it cost me $198. The car really drives differently, it feels smother when shifting gears, quiet rid; it is not "placebo effect", therefore, I suggest Q50 hybrid drivers change transmission oil.
This is the first time I have ever heard the term Transmission Oil.
 

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Just changed my transmission oil yesterday on Q50 hybrid at the dealer. it cost me $198. The car really drives differently, it feels smother when shifting gears, quiet rid; it is not "placebo effect", therefore, I suggest Q50 hybrid drivers change transmission oil.
IMHO the reason you can feel the difference (and yes I also felt the difference when I changed my tranny fluid in the hybrid) is that the hybrid transmission holds less transmission fluid than the non hybrid cars. So the fluid will break down quicker over time.

Look at the picture below, there is no torque converter in the hybrid transmission, in its place is an electric motor and dry clutch.

https://www.google.com/imgres?imgurl=https://www.picclickimg.com/d/l400/pict/142482692836_/Automatic-Awd-Transmission-Out-Of-A-2014-Infiniti.jpg&imgrefurl=https://picclick.com/Oem-Automatic-Transmission-Out-Of-A-2014-Infiniti-142482692836.html&docid=bcUMEKeK4CYneM&tbnid=zGNG3dIejbLUEM:&vet=10ahUKEwja8-LJg-7kAhVZ8HMBHQllCXoQMwhUKAcwBw..i&w=400&h=300&safe=off&bih=1298&biw=1519&q=q50 hybrid transmission&ved=0ahUKEwja8-LJg-7kAhVZ8HMBHQllCXoQMwhUKAcwBw&iact=mrc&uact=8
 

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This is the first time I have *every heard the term Transmission Oil.

You are right it is called ATF, however, in other languages it is called "Gear oil". Also, modern ATF consists of a base oil plus an additive package containing a wide variety of chemical compounds intended to provide the required properties of a particular ATF specification.

Note: *ever Not every
 

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You are right it is called ATF, however, in other languages it is called "Gear oil". Also, modern ATF consists of a base oil plus an additive package containing a wide variety of chemical compounds intended to provide the required properties of a particular ATF specification.

Note: *ever Not every


Yes, ever, not every, thanks.
 
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