2015 Nismo 7AT Shift Quality

UNKNOWN_370 · 04-02-2015, 10:05 PM

It's a 3.6 gear ratio vs the normal 3.36. Haven't test driven it yet.

Chan Chee Hoe · 04-03-2015, 12:50 AM

Quote:

Originally Posted by UNKNOWN_370

It's a 3.6 gear ratio vs the normal 3.36. Haven't test driven it yet.

Meaning lower revs at let's say 100km/h[62mph].?

Davey · 04-03-2015, 06:16 AM

Quote:

Originally Posted by Chan Chee Hoe

Meaning lower revs at let's say 100km/h[62mph].?

No, higher. The higher the number, the higher the revs at a given speed, that's a simple rule of thumb, so for example a 3.0:1 gear would have a lower RPM at a given speed vs. a 4.0:1 gear.

Allentown · 04-03-2015, 08:42 AM

How hard is it to change the ratio? In the mustang it was just a drop in part in the rear differential, about $300 to $400.

Will help mpg down low if you drive in town all day, but will hurt highway mpg. Also with this system it could have some wonky effects on the shift points (wasn't an issue on the stangs but i dont know about the z)?

Davey · 04-03-2015, 11:09 AM

Quote:

Originally Posted by Allentown

How hard is it to change the ratio? In the mustang it was just a drop in part in the rear differential, about $300 to $400.

Will help mpg down low if you drive in town all day, but will hurt highway mpg. Also with this system it could have some wonky effects on the shift points (wasn't an issue on the stangs but i dont know about the z)?

It's not really a drop-in part. It requires some skill to set the clearances properly so it doesn't whine like a school bus. The labor can get expensive.

If I were going to change the rear end ratio, I'd get the most bang for my buck and add a real LSD at the same time.

Chan Chee Hoe · 04-03-2015, 06:40 PM

Quote:

Originally Posted by Davey

No, higher. The higher the number, the higher the revs at a given speed, that's a simple rule of thumb, so for example a 3.0:1 gear would have a lower RPM at a given speed vs. a 4.0:1 gear.

That is no good,i always find the car crusing @100 km/h[62mph],at 2000rpm,a tad too high,most cars now only 1700 rpm at the same speed to save fuel.

critical · 04-03-2015, 08:40 PM

Quote:

Originally Posted by Chan Chee Hoe

That is no good,i always find the car crusing @100 km/h[62mph],at 2000rpm,a tad too high,most cars now only 1700 rpm at the same speed to save fuel.

we drive a 370z.

gears and acceleration > eco fuel savings

i'm at about 3000 rpm's at 80mph

04-02-2015, 10:05 PM	#1 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14859	It's a 3.6 gear ratio vs the normal 3.36. Haven't test driven it yet. __________________ Favorite Quote. "I'm not gonna kill you... I'm just gonna Bash Your Face In" Jack Nicholson-"The Shining". 1980

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04-03-2015, 08:42 AM	#4 (permalink)
Allentown Base Member Join Date: Mar 2015 Location: Georgia Posts: 34 Drives: 2015 Sport Tech Rep Power: 12	How hard is it to change the ratio? In the mustang it was just a drop in part in the rear differential, about $300 to $400. Will help mpg down low if you drive in town all day, but will hurt highway mpg. Also with this system it could have some wonky effects on the shift points (wasn't an issue on the stangs but i dont know about the z)?