7 Speed Auto Trans Fluid Change

nis350

What is the trans fluid change interval for the Auto 7 speed transmission?

I read that the A7 requires special tool to change the fluid. I have also read some posts that the fluid is lifetime and that's the reason Nissan didn't specify the change interval.

Also read that some dealers don't know about the special procedures.

Thoughts? Thanks.

JWillis72

They claim you never need to change it but I don't get it. My car has 27,000 and I've changed it twice.

JARblue

Might want to note that you track your Z. In which case, changing it twice in 30K miles makes actual sense. For most DD applications, I would say it's not worth the chance of going to a dealer that doesn't know what they're doing and screwing it up. Or at least there's not much point in doing it before 80-100K miles.

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JWillis72

Good point, I guess I should have said that.


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JARblue

There is no interval for the 7AT fluid. According to Nissan, that fluid is maintenance-free.

A few people on the forum have had it done by their dealer. Sounds like you read about the dealer that messed up cause they didn't know what they were doing. Unless you're having trouble with your transmission, its probably not worth messing with it.

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nis350

I have read many posts from the z as well as the g37 forums. Many people leaning toward not changing it. Some stated that the trans fluid is very different than motor oil and it can last a long time(?).

I don't track the car and I don't mind paying the $200 to change it, but I am worry that they might screw it up in the process such as introducing contaminants into the trans.

I am sorry, but I don't have much faith with the dealer mechanics as they all try to rush through as many jobs as possible so they'd get paid for 20 hours in a 8 hour day.

Thank you all your responses.

Jordo!

Unless you are tracking it or are coming up on 100K, I wouldn't bother just yet.

If you decide you should change it, there is a fairly specific procedure -- I believe it is detailed in the FSM, which can be downloaded from here --> 2009 370z Service Manual Complete ready to Download!

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SouthArk370Z

"Lifetime" according to Nissan. I had my trans and diff lubes changed at about 20K miles but I tend to go a little overboard on those things. If I had kept the car, I wouldn't have changed again until about 80K/5yrs.

You need to be able to monitor one of the temperature sensors in the transmission to determine when the proper level is reached. This usually requires the CONSULT computer that dealer's have. See FSM for details. Other than that, no special tools are required. I vaguely remember a DIY that didn't require monitoring the sensor but I can't seem to find it.

In my experience, Nissan service departments don't know about regular procedures (eg, tire pressure, battery level, &c). Which is exactly why I no longer drive a Nissan.

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EVOHUNTER

I disagree, Any basic scanner can give you trans temp. Gynesis, versus etc.. You don't need a CONSULT by any means.


The scanner is used to make sure the fluid is warm, and has expanded.
Once the operating temp is reached, the bolt can be removed.

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SouthArk370Z

Excellent! Can you provide the appropriate Mode/PIDs?

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

EVOHUNTER

select car >ObdII> Transmission/drivetrain > live data stream > scroll down to trans temp while car is running.

?? im not sure if this is what your asking for??

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conmam

Are you 100% sure about this ? I will be buying a generic Craftsman OBD tool soon ( around $300 ). The reason I am asking is because the Nissan AT transmission fluid temp is not a generic OBD II parameter, it is more proprietary ( just like engine oil temperature ). Therefore, I don't know if a generic scanner would read out individual manufacture's unique data....

EVOHUNTER

Im not 100% sure about this one, but it says it covers Drivetrain/abs.

But i can't find any info on the real time data stream.

If your buying it for only the trans temp in data stream, and it doesn't have it.
return it. Say you weren't happy with the product.

My napa genesis has this feature, its a little bit more $$ than what your looking at. Doesn't cypher have a live data stream of the transtemp?

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conmam

No. Unfortunately Cipher live data stream dies not have this parameter

juld0zer

you could probably get away with an IR thermometer pointed at the sump, just account for a few degrees difference and you should be sweet. that's what i'd do but what you do is up to you