Thread: is there anyone okay with your 370Z after 100K miles without ATF change?
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Old 03-29-2016, 09:35 PM   #3 (permalink)
FairladyZ40th
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Join Date: Jul 2015
Location: San Diego
Posts: 483
Drives: 2010 370z 40th 6MT
Rep Power: 61
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Originally Posted by felix0121 View Post
I did read the maintenance guide. It said the 370Z's automatic transmission is maintenance free.

I really get confused here. Now I'm using my second Nissan genuine automatic transmission on my 370Z. I got it installed after its fluid had been changed when around hitting 100K miles and was soon broken after that ATF replacement. (it was a Nissan genuine AT fluid of course, because I got service at a Nissan dealership).

It does not mean that changing fluid surely did break it. I got my 370Z as a pre-owned one, and have no idea about what exactly its previous owners had put into it. (If in case they had put any third party ATF, then it might not be maintenance free, right?) - or it just unfortunately might be classified as a 'defect'.

Anyway I really do not want to see my transmission broken again. I want to keep my Z as long as possible even after I buy another car in the future. My dealership recommends me to get it checked everytime I take the oil change and replace its AT fluid basically every 100K miles.

I don't go to the track, and consider myself as a just normal daily driver with some rare spirited driving that I enjoy my zero to sixty when I enter to the freeway.

So, is there anyone in this forum okay with your automatic transmission without changing its fluid even after 100~200 miles? Is its fluid literally 'ever-lasting' as maintenance free? I've done pretty much research for this by myself, but still cannot make my decision.


I've been told many times not to ever swap the AT fluid in a car and the differential fluid IFF, they have high miles because of the muk and gum that builds up within the system. Basically that dirtiness that builds up in there helps fill in gaps and wear within the systems and so when you put in new fluid all that helpful gum comes out and thus leaving your stuff vulnerable... My $0.02.

However if you swap your fluid early enough and continue this practice you should be good.
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