gears 3.69 to 3.91

fantaZ · 07-20-2017, 11:25 PM

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, 09:54 AM

Quote:

Originally Posted by fantaZ

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

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

fantaZ · 07-21-2017, 01:12 PM

Quote:

Originally Posted by nandosman

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

what i don"t get it

barncobob · 07-21-2017, 02:16 PM

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

Korstix · 07-21-2017, 02:53 PM

Quote:

Originally Posted by fantaZ

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, 04:16 PM

Yes you will, I love my.

DeliriousClam · 07-21-2017, 04:18 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

07-20-2017, 11:25 PM	#1 (permalink)
fantaZ Enthusiast Member Join Date: Mar 2016 Location: FL Posts: 273 Drives: 2013 370z nismo Rep Power: 9	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?

07-21-2017, 04:16 PM	#6 (permalink)
ramoszx12r Track Member Join Date: Sep 2015 Location: Carneys point NJ Posts: 665 Drives: 16 370Z Nismo White. Rep Power: 1428	Yes you will, I love my. __________________ Tony Ramos

07-21-2017, 04:18 PM	#7 (permalink)
DeliriousClam A True Z Fanatic Join Date: May 2015 Location: NJ Age: 31 Posts: 3,758 Drives: 12 Base Sport Rep Power: 54272	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 fantaZ likes this. __________________ Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet MECP Advanced: CEA26671 Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

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07-21-2017, 02:16 PM	#4 (permalink)
barncobob A True Z Fanatic Join Date: Sep 2015 Location: hangtown, CA Posts: 1,164 Drives: 16 370Z auto Rep Power: 590	2 differences, UR top end will suffer and youll be at the gas pump more