Nissan 370Z Forum - gears 3.69 to 3.91

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fantaZ

07-20-2017 10:25 PM

gears 3.69 to 3.91

I have a 2013 nismo tuned 357 rwh. Thinking about changing rear diff gears from 3.69 stock to 2015-18 nismo stock 3.91. Is it worth it cost wise? will i feel a difference. and do i need my car retuned if i do go to 3.91?

nandosman

07-21-2017 08:54 AM

Quote:

Originally Posted by fantaZ (Post 3676914)

Is it worth it cost wise? will i feel a difference.

You will feel a differential. I will show myself out. :happydance:

fantaZ

07-21-2017 12:12 PM

Quote:

Originally Posted by nandosman (Post 3677043)

you will feel a differential. I will show myself out. :happydance:

what i don"t get it

barncobob

07-21-2017 01:16 PM

2 differences, UR top end will suffer
and youll be at the gas pump more

Korstix

07-21-2017 01:53 PM

Quote:

Originally Posted by fantaZ (Post 3677134)

what i don"t get it

I believe he's referring to the play on words haha. Different-ial, you will feel different with alternate work on the different-IAL. I can dig it.

ramoszx12r

07-21-2017 03:16 PM

Yes you will, I love my.

DeliriousClam

07-21-2017 03:18 PM

I'm considering doing this as well. From what I can gather, you'll only need (not even really need) a re-tune if you have a manual with SRM and want to keep SRM working.
I'm curious to see how 3.9's with nitrous will be

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