Oddity with 7AT

kannibul · 11-30-2009, 09:47 AM

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, 10:47 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, 11:33 AM

Quote:

Originally Posted by WhiskeyHotel

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.

Forrest · 11-30-2009, 12:56 PM

Quote:

Originally Posted by kannibul

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.

11-30-2009, 09:47 AM	#1 (permalink)
kannibul A True Z Fanatic Join Date: Jun 2009 Location: Jenks, OK Posts: 2,281 Drives: 370z Touring/Sport Rep Power: 267	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...

11-30-2009, 10:47 AM	#2 (permalink)
WhiskeyHotel Track Member Join Date: Nov 2009 Location: Oklahoma Posts: 530 Drives: 2015 GT-R PW Premium Rep Power: 17	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.