Possibility of a 7 speed auto tranny in the new Z?

admin · 09-24-2008, 01:45 AM

Copied from G35driver

Quote:

Originally Posted by Nissan North America
Explaining the benefits of Infiniti’s new transmission

The target: create an automatic transmission with all the best features of a manual transmission. Here’s how Infiniti engineering gives drivers the best of both worlds.

The automatic transmission traditionally represented a compromise. It gave drivers the convenience of smooth, clutchless shifting, but it sacrificed the direct connection, driver control, and enhanced fuel economy of a stick shift.

Infiniti’s new 7-speed automatic transmission, available on 2009 FX35, FX45, G37 Sedan, G37 Coupe, and the upcoming 2009 M35 (rear-wheel-drive), takes the automatic closer than ever before to the feel and operation of a manual transmission.

No More “Slush-Box”

Slippage between the engine and transmission earned early automatics the nickname “slush-boxes.” The hydraulic clutch system for making gear changes could not operate as quickly or directly as a manual transmission’s mechanical clutch.

All modern automatics have a lockup torque converter, which limits slippage by creating a solid mechanical connection between the engine and transmission. For smoother operation over a wider range of operating conditions, newer designs vary the amount of converter lockup (from a 100% solid connection to a partial lockup condition).

Infiniti’s 5- and 7-speed transmissions use a multiple disc torque converter lockup design that allows the unit to “ease” into lockup, minimizing the shudder that can occur in single-disc designs.

While Infiniti is not the first manufacturer to vary the level of torque converter lockup, it has created an extremely wide available lock-up range with the new 7-speed transmission:

With the transmission in Drive, partial lockup is available in 2nd through 7th gears while full lockup occurs in 7th.
With the transmission in manual shift mode, both partial and full lockup are available in 2nd through 7th gears.
Some amount of lockup occurs at all throttle positions and at speeds greater than about 15 mph. The result? Infiniti's 7-speed transmission provides a more direct, solid-feeling connection than drivers typically expect from an automatic transmission.

In manual shift mode, a flick of the 7-speed’s shift lever makes the half-second gear change a reality.

Driver Control

For driving enthusiasts, one of the lures of a manual transmission is the control it gives them to select and maintain the gear they want. Several features of Infiniti’s new automatic transmission directly address this concern.

One of the foremost is manual shift mode. Consider this: for anyone other than a seasoned race driver, it generally takes more than half a second to make a smooth shift with a manual transmission — depress clutch, move shift lever, release clutch, apply throttle.

But in manual shift mode, a flick of the 7-speed’s shift lever (or available steering-column-mounted paddle shifters) makes that half-second gear change a reality.

For smoother downshifting, Downshift Rev Matching (DRM) mimics the heel-and-toe maneuver used by skilled drivers during manual transmission downshifts.

The 7-speed design targets both performance and fuel efficiency.

The 7-speed includes other features first seen on Infiniti 5-speeds, including:

Adaptive Shift Control, which enhances gear selection by using a lateral acceleration sensor to detect changes in the road (such as hills and turns).
Drive Sport Mode (DSM), which allows the driver to select a more aggressive shift pattern (automatic up- and downshifting at higher rpm).
Combined, these features allow any driver to enjoy quick, smooth shifts and gear choices that are appropriate to both the road and their desired driving style — some of the enthusiast’s main reasons for choosing a manual.

Enhancing Economy

Automatic transmission vehicles typically suffer a small penalty in fuel economy estimates when compared to their manual transmission counterparts. Infiniti’s 7-speed design targets not only performance, but also enhanced fuel economy:

The wide range of torque converter lockup operation maximizes engine efficiency (less power is wasted as slippage).
In previous 5-speeds, only 5th gear provided an overdrive ratio. Now both 6th and 7th gears are overdrive ratios, allowing the engine to operate at lower rpm during a broader range of highway speeds.
Owners may not understand the penalties they have paid in the past for the convenience of an automatic transmission. But whether drivers want “hands on” or “hands off” control, Infiniti’s new transmission will provide a satisfying driving experience.

EazyD · 02-08-2011, 12:30 PM

bump

This was the earliest post I could get to by clicking "Last page" - this was when things were just hearsay for the 370Z!

Red__Zed · 02-08-2011, 12:47 PM

Quote:

Originally Posted by EazyD

bump

This was the earliest post I could get to by clicking "Last page" - this was when things were just hearsay for the 370Z!

flashburn · 02-08-2011, 12:52 PM

Seven!?! Holy ****!

spearfish25 · 02-08-2011, 01:21 PM

F it! Make it 8 speed!

JACKPAC · 02-08-2011, 01:33 PM

They put a special reverse in mine, so I have 8 speeds!

kenchan · 02-08-2011, 01:38 PM

why stop at 7? they should be 12 speed like my bicycle was back several decades ago.

370Z_Fan · 02-08-2011, 01:41 PM

How about 7 speeds in reverse? Now that would be a cool idea!

ChrisSlicks · 02-08-2011, 01:45 PM

Quote:

Originally Posted by 370Z_Fan

How about 7 speeds in reverse? Now that would be a cool idea!

Mercedes has a 2 speed reverse, but I'm not sure 7 would be all that practical. Steering a car while doing 100 mph in reverse would be a little tricky!

4r3s · 02-08-2011, 03:13 PM

Quote:

Originally Posted by ChrisSlicks

Steering a car while doing 100 mph in reverse would be a little tricky!

psssh...amateur....

HKYStormFront · 02-08-2011, 03:28 PM

Quote:

Originally Posted by spearfish25

F it! Make it 8 speed!

that's what Lexus said...

Jordo! · 02-08-2011, 03:34 PM

The devil you say.

mick · 02-08-2011, 03:35 PM

i am sure the auto trans in the new z will be very advanced. i just hope that they don't stop making the conventional manual transmission.

JACKPAC · 02-08-2011, 03:51 PM

Quote:

Originally Posted by mick

i am sure the auto trans in the new z will be very advanced. i just hope that they don't stop making the conventional manual transmission.

They won't stop making it... unfortunately, they won't spend any time or effort improving it either.

PapoZalsa · 02-08-2011, 09:01 PM

Guys look at the freaking date of this thread, 09-24-2008.

02-08-2011, 12:30 PM	#2 (permalink)
EazyD A True Z Fanatic Join Date: Nov 2009 Location: Massachusetts, USA Posts: 1,211 Drives: 2010 6MT Sport pkg. Rep Power: 26	bump This was the earliest post I could get to by clicking "Last page" - this was when things were just hearsay for the 370Z! __________________ Pearl White 2010 370Z Sport, Stillen CBE, tint, K&N drop-in filters, GT-R start button, Kenwood DNX-6980 with backup cam, LED bulbs, Raceseng shift knob.

02-08-2011, 12:52 PM	#4 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 19	Seven!?! Holy **! __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT**

02-08-2011, 01:21 PM	#5 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	F it! Make it 8 speed! __________________ 2013 Cadillac V-Wagon, RIP Z

02-08-2011, 03:34 PM	#12 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	The devil you say. __________________ Enjoy it. Destroy it.

02-08-2011, 09:01 PM	#15 (permalink)
PapoZalsa A True Z Fanatic Join Date: Nov 2009 Location: Not in Sunny Florida Posts: 6,358 Drives: 16 Nismo w/Tech Pack Rep Power: 4500	Guys look at the freaking date of this thread, 09-24-2008. __________________ 2009 370Z MB Base w/Sport Package 6MT Modshack's Custom Air Intakes /3M Clear Bra/ Illuminated Kick Plates / F. I CBE w/12" resonators / EVO-R Front Lip / Rear Hatch Wing / Tein S-Tech Springs /Ilegal Tint in the Rep. of VA/4x20mm Z1 Spacers/ Vinyl Roof/Liquid Carbon Designs

02-08-2011, 01:33 PM	#6 (permalink)
JACKPAC Track Member Join Date: Sep 2009 Location: Kentucky Posts: 516 Drives: MB 370z Rep Power: 17	They put a special reverse in mine, so I have 8 speeds!

02-08-2011, 01:38 PM	#7 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	why stop at 7? they should be 12 speed like my bicycle was back several decades ago.

02-08-2011, 01:41 PM	#8 (permalink)
370Z_Fan Base Member Join Date: Apr 2009 Location: Toronto, ON Posts: 238 Drives: 2010 MB ZR sport pkg Rep Power: 16	How about 7 speeds in reverse? Now that would be a cool idea!

02-08-2011, 03:35 PM	#13 (permalink)
mick Track Member Join Date: Jan 2010 Location: California Posts: 903 Drives: Used to drive a 370z Rep Power: 16	i am sure the auto trans in the new z will be very advanced. i just hope that they don't stop making the conventional manual transmission.