2009 Nissan 370Z Automatic - Short Take Road Test

wstar · 04-27-2009, 01:52 PM

Here's some raw data on our 6MT vs 7AT gear ratios based on the service manual and simple multiplication:

6MT:
Rear Diff 3.692
1st 3.794
2nd 2.324
3rd 1.624
4th 1.271
5th 1.000
6th 0.794
Rev 3.446

7AT:
Rear Diff 3.357
1st 4.924
2nd 3.194
3rd 2.043
4th 1.412
5th 1.000
6th 0.862
7th 0.772
Rev 3.972

Total gearing, 6MT:
1st 14.007448
2nd 8.580208
3rd 5.995808
4th 4.692532
5th 3.692000
6th 2.931448
Rev 12.722632

Total gearing, 7AT:
1st 16.529868
2nd 10.722258
3rd 6.858351
4th 4.740084
5th 3.357000
6th 2.893734
7th 2.591604
Rev 13.334004

The 7AT has a wider overall range (lower first gear, higher final gear), but with an extra gear the "closeness" doesn't look too bad, although I didn't run those numbers.

Also, another thing to keep in mind in discussing this, is that the 7AT so far has seemed to have more driveline power loss on the dyno, which is to be expected.

04-27-2009, 01:52 PM	#11 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	Here's some raw data on our 6MT vs 7AT gear ratios based on the service manual and simple multiplication: 6MT: Rear Diff 3.692 1st 3.794 2nd 2.324 3rd 1.624 4th 1.271 5th 1.000 6th 0.794 Rev 3.446 7AT: Rear Diff 3.357 1st 4.924 2nd 3.194 3rd 2.043 4th 1.412 5th 1.000 6th 0.862 7th 0.772 Rev 3.972 Total gearing, 6MT: 1st 14.007448 2nd 8.580208 3rd 5.995808 4th 4.692532 5th 3.692000 6th 2.931448 Rev 12.722632 Total gearing, 7AT: 1st 16.529868 2nd 10.722258 3rd 6.858351 4th 4.740084 5th 3.357000 6th 2.893734 7th 2.591604 Rev 13.334004 The 7AT has a wider overall range (lower first gear, higher final gear), but with an extra gear the "closeness" doesn't look too bad, although I didn't run those numbers. Also, another thing to keep in mind in discussing this, is that the 7AT so far has seemed to have more driveline power loss on the dyno, which is to be expected. __________________ 7AT Track Car! Journal thread / Car setup details

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
MotorTrend First Test: 2009 Nissan 370Z test drive 4.7 sec 0 to 60 11.25.08	AK370Z	Nissan 370Z Photos / Spyshots / Video / Media Gallery	47	11-11-2009 08:06 PM
MotorWeek Road Test: 2009 Nissan 370Z	dlmartin81	Nissan 370Z Photos / Spyshots / Video / Media Gallery	10	03-16-2009 12:59 AM
2009 Nissan 370Z - "NEW" Road Test By Car and Drive 02.04.09	AK370Z	Nissan 370Z General Discussions	6	02-05-2009 08:06 PM
ROAD & TRACK Video - Full Test: 2009 Nissan 370Z	sbsmoov	Nissan 370Z General Discussions	4	12-01-2008 11:05 PM
Great C&D article... 2009 Nissan 370Z - Road Test	ctzn	Nissan 370Z General Discussions	21	12-01-2008 04:34 PM