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-   -   Oddity with 7AT (http://www.the370z.com/engine-drivetrain/11741-oddity-7at.html)

kannibul 11-30-2009 08:47 AM

Oddity with 7AT
 
Driving the other day, I noticed that the 7AT, while in "D", will shift into a higher gear and maintain a lower RPM than if you're in manual-mode and push the +...

For example, you can be driving in manual mode, with your RPM at just under 2K. Either bump the + paddle, or push up on the gear selector, and it doesn't shift. Push it over to D, and it shifts.

Obviously, there's some extra economy-based programming going on there!

I've also noticed that my Z, in D, seems to be pretty aggressive about keeping RPMS low...moreso than I'd expect - even to the point of thinking "why didn't it downshift there"...

It was times like the above driving session that has me thinking, yeah, I should have gotten the 6MT instead, but, most of the time it's not in the way...

WhiskeyHotel 11-30-2009 09:47 AM

Actually, if you read the manual closely (and if it worked like my 350 AT did), manual mode is a way to select a "shift range". It just limits the highest gear that the transmission will use.

That said, I went to the MT this time.

kannibul 11-30-2009 10:33 AM

Quote:

Originally Posted by WhiskeyHotel (Post 300841)
Actually, if you read the manual closely (and if it worked like my 350 AT did), manual mode is a way to select a "shift range". It just limits the highest gear that the transmission will use.

That said, I went to the MT this time.

I think you're referring to something else.

:tiphat:

Forrest 11-30-2009 11:56 AM

Quote:

Originally Posted by kannibul (Post 300807)
Driving the other day, I noticed that the 7AT, while in "D", will shift into a higher gear and maintain a lower RPM than if you're in manual-mode and push the +...

For example, you can be driving in manual mode, with your RPM at just under 2K. Either bump the + paddle, or push up on the gear selector, and it doesn't shift. Push it over to D, and it shifts.

Obviously, there's some extra economy-based programming going on there!

I've also noticed that my Z, in D, seems to be pretty aggressive about keeping RPMS low...moreso than I'd expect - even to the point of thinking "why didn't it downshift there"...

It was times like the above driving session that has me thinking, yeah, I should have gotten the 6MT instead, but, most of the time it's not in the way...

I noticed this with my auto 350z. 5th gear in auto mode and 5th gear in Manual mode both had different RPM.s In auto mdoe 5th gear was lower rpm by a little bit than Manual mode.

I assumed auto mode has a gas saver technique which i was kind of greatfull for.


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