7Post
7Post
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   7Post - 7 Series Forum > BMW 7-Series Forums > General 7-series (F01) Discussion

Post Reply
 
Thread Tools Search this Thread
      04-14-2008, 07:03 AM   #1
mapezzul
Special Agent
 
mapezzul's Avatar
 
Drives: Depends on the day!
Join Date: Jul 2005
Location: Bavaria

Posts: 1,736
iTrader: (1)

F01 7-series to get 8 speed automatic transmission.



Quote:
In order to keep up with the Jones’ BMW has had to think a bit outside the box. Our sources indicate that the transmission BMW will utilize takes up the same amount of space as the current 6 speeds and will not use additional components. This has been made possible by a completely new transmission concept. We have learned that it utilizes four planetary gear sets and five transmission clutches. Two transmission clutches are unlocked per gear, thus resulting in greater efficiency and a higher overall transmission ratio.

It is touted as being smoother and will reduce fuel consumption by almost six percent; way to go Efficient Dynamics! Since it is the same size as the current 6 speeds, a larger hump or other invasions into the passenger cabin space is not necessary. The gear selector will also return to the console from its previous stalk location; a well welcomed change for many.- Bimmerfile (the original source)
There has been some new info obtained about the particulars of this transmission. Specifically it uses an new approach to autos in order to obtain higher efficiency in a package the same size as current 6 speeds. It will be used in all application, hybrid and x-drive further indicating the 7 will see these variants.

BMW explored other options but the 8 speed was the most efficient.

http://www.bimmerfile.com/2008/04/14...eed-automatic/

Last edited by mapezzul; 04-14-2008 at 04:45 PM.
mapezzul is offline   United_States
0
Reply With Quote
      04-14-2008, 02:29 PM   #2
Year's_End
RWD only.
 
Year's_End's Avatar
 
Drives: '08 E92 335i
Join Date: Feb 2007
Location: St. Pete, FL

Posts: 12,294
iTrader: (0)

8 speeds is definitely one too many. Six speeds are fine, and I guess a seventh gear could be used for cruising, but eight is just overkill.
__________________
E92 335i: Space Grey|Coral Red|Aluminum Trim

Future Ride: 2015 Mustang GT Premium |Guard|401A|PP|Recaros|6MT
Year's_End is offline   United_States
0
Reply With Quote
      04-14-2008, 02:32 PM   #3
KonigsTiger
Racying Dynamics
 
KonigsTiger's Avatar
 
Drives: E92M3 RS46 Club Sport, others
Join Date: Jan 2008
Location: Dweller

Posts: 4,398
iTrader: (0)

God I hope not, imagine all that shifting!
__________________
==================================================
KonigsTiger is offline  
0
Reply With Quote
      04-14-2008, 02:42 PM   #4
mapezzul
Special Agent
 
mapezzul's Avatar
 
Drives: Depends on the day!
Join Date: Jul 2005
Location: Bavaria

Posts: 1,736
iTrader: (1)

It is an auto and is going to be extremely smooth shifting. The 7 is not a performance model but a luxury car. The idea is to keep gas consumption down and ride quality up the transition between ratios will be smoother. I guess people just do not get it.
mapezzul is offline   United_States
0
Reply With Quote
      04-14-2008, 03:11 PM   #5
x5love
Captain
 
Drives: 08 E92 335i
Join Date: Dec 2005
Location: CA

Posts: 693
iTrader: (0)

Quote:
Originally Posted by BMW-M-Mexico View Post
God I hope not, imagine all that shifting!
What 7 series driver is really that intenresnted in shifting? You can't even shift in the current 7 unless you use the button paddles on the steering wheel which are a major hassle to use anyway...

The shorter wheel base 7 will get the X5 shifter (as the spy pics show) and I'm assuming the 6-gear trans, that will shift fine. But the longer wheel base 7 with the 8 speed isn't meant for sporty drivers.

As many reports indicate BMW is really going to differentiate the short wheel base and long wheel base 7--mostly through interior design and execution. One will be the sport 7, and the other the luxury 7.
__________________
E92 335i|Jet Black|Black Dakota|Alu|Step/paddles|ZPP|ZSP|6FL|Navi|Heated Seats|CA
x5love is offline   United_States
0
Reply With Quote
      04-14-2008, 03:48 PM   #6
Year's_End
RWD only.
 
Year's_End's Avatar
 
Drives: '08 E92 335i
Join Date: Feb 2007
Location: St. Pete, FL

Posts: 12,294
iTrader: (0)

Quote:
Originally Posted by mapezzul View Post
It is an auto and is going to be extremely smooth shifting. The 7 is not a performance model but a luxury car. The idea is to keep gas consumption down and ride quality up the transition between ratios will be smoother. I guess people just do not get it.
I still think 8 is overkill. Unless it can solve the endless shifting for the proper gear problem (like in the Lexus LS), I would expect 7 to be just enough. Even if you're not shifting, the computer still has to sort out which gear to be in.
__________________
E92 335i: Space Grey|Coral Red|Aluminum Trim

Future Ride: 2015 Mustang GT Premium |Guard|401A|PP|Recaros|6MT
Year's_End is offline   United_States
0
Reply With Quote
      04-14-2008, 04:28 PM   #7
Imola.ZHP
No car payments...
 
Imola.ZHP's Avatar
 
Drives: 2003 BMW 330i ZHP
Join Date: Mar 2006
Location: Mud Island, TN

Posts: 1,975
iTrader: (0)

Send a message via AIM to Imola.ZHP Send a message via MSN to Imola.ZHP Send a message via Yahoo to Imola.ZHP
lol, here is an easy fix, don't buy an F01...

Problem Solved!

Wouldn't bother me though, uh, if I could afford one; however, if there were a manual option, it would be the first pick...
__________________

Marcus
-- 330i ZHP
-- Build Date 03/03/03
Imola.ZHP is offline   United_States
0
Reply With Quote
      04-14-2008, 04:58 PM   #8
Dascamel
Lieutenant Colonel
 
Dascamel's Avatar
 
Drives: 2008 e92 M3, 2010 e91 328i
Join Date: Jul 2007
Location: Bakersfield, CA

Posts: 1,662
iTrader: (0)

Hmmm, imagine trying to rebuild the transmission.
__________________
2008 E92 M3 Jerez Black,DCT,Fox Red ext,Prem,Tech,19", ipod/usb, CF roof and trim
2010 E91 328i Space Gray,Black int, M sport, most options
2007 Montego Blue 335i (retired)
Dascamel is offline  
0
Reply With Quote
      04-14-2008, 05:24 PM   #9
Bluesummer
Lieutenant General
 
Bluesummer's Avatar
 
Drives: slower than Ayrton Senna
Join Date: Dec 2006
Location: Nürburgring, be there once, your heart, your soul will stay there.

Posts: 15,410
iTrader: (13)

Garage List
2015 M4  [0.00]
2011 E82 135  [0.00]
2011 M3  [0.00]
2007 335  [0.00]
manufactures need to stop putting more gears than needed on new cars
__________________

R.I.P. Steve Noh
Bluesummer is offline   Taiwan
0
Reply With Quote
      04-14-2008, 08:41 PM   #10
Minimization
Private First Class
 
Minimization's Avatar
 
Drives: 2006 BMW M5 Sedan SMG III
Join Date: Aug 2007
Location: Seattle, Washington, USA

Posts: 155
iTrader: (0)

People do not get it. In a perfect world, a transmission would have an infinite number of gears. The problem with this is the finite time it takes to shift between gears and the finite room in the housing that each gear takes up. As technology progresses more gears have become standard. CVT are trying to achieve infinite gear ratios but they are only currently available for low torque/rpm applications.

I remember when people were claiming that 6 speed manuals were overkill and 5 speed manuals were just fine. They were not, actually. My '86 Scirocco GTX 16V cruised at 4,000/min at 80 mi/hr in fifth. It could have used six or seven gears back then.

You have lots of gears to optimize acceleration and a couple of overdrive gears for minimal fuel consumption in the 60-100 mi/hr cruising range.

Sportiness is not necessarily lost with eight gears. The M5 has 7 in the SMG III now, it's very sporty, and could probably use an eighth gear. They could crowd the first seven together to enhance accelerations all the way to Vmax (not just for 0-60 mi/hr) while putting an eight gear in to replace the existing top gear for cruising. I think ideally a car should redline in top gear right at the speed where it gets drag-limited (Vmax).
__________________
2006 BMW M5 Sedan
SMG III
Silverstone Metallic/Black Perforated Merino/Aluminum,
X2/4MA/610/322/453/655/416/465/261/496
Minimization is offline   United_States
0
Reply With Quote
      04-14-2008, 08:41 PM   #11
Etnies
Private First Class
 
Etnies's Avatar
 
Drives: .
Join Date: Oct 2007
Location: .

Posts: 127
iTrader: (0)

Hope it works...
Etnies is offline   United_States
0
Reply With Quote
      04-14-2008, 09:35 PM   #12
335destroyer
Private First Class
 
335destroyer's Avatar
 
Drives: black 335i
Join Date: Apr 2008
Location: SoCal

Posts: 122
iTrader: (0)

Send a message via AIM to 335destroyer
that'll be pretty cool, but doesnt the isf have 8 speed auto
335destroyer is offline   United_States
0
Reply With Quote
      04-14-2008, 09:54 PM   #13
lux.sh
missing two turbos.
 
lux.sh's Avatar
 
Drives: fast around corners.
Join Date: Sep 2005
Location: Curves

Posts: 4,860
iTrader: (12)

Garage List
For those saying 8speed is overkill...

Im sure those smartass BMW engineers know way more than you do.
it did say "they explored other options, but 8spd was most efficient".
__________________
06 AW E90 330i ZPP/ZSP/Step/Expired Warranty

: Prior Design Front : ACS Rear : ACS Roof : BlackLines : Simota Intake : Carbon Fiber Interior Trim :
: MTEC V3 : 24% Charcoal : V1 Hardwired : Solaris Invisibulbs/LED interior :
lux.sh is offline   United_States
0
Reply With Quote
      04-14-2008, 10:32 PM   #14
Year's_End
RWD only.
 
Year's_End's Avatar
 
Drives: '08 E92 335i
Join Date: Feb 2007
Location: St. Pete, FL

Posts: 12,294
iTrader: (0)

Wow, I never doubted the "smartass" BMW engineers. I'm just sayin that the Lexus LS has troubles with the amount of gears it has, and that it's continuously sorting through them.

I'm not saying that that will dictate the future of this transmission.
__________________
E92 335i: Space Grey|Coral Red|Aluminum Trim

Future Ride: 2015 Mustang GT Premium |Guard|401A|PP|Recaros|6MT
Year's_End is offline   United_States
0
Reply With Quote
      04-14-2008, 10:55 PM   #15
lux.sh
missing two turbos.
 
lux.sh's Avatar
 
Drives: fast around corners.
Join Date: Sep 2005
Location: Curves

Posts: 4,860
iTrader: (12)

Garage List
Quote:
Originally Posted by Bimmer Loyalist View Post
Wow, I never doubted the "smartass" BMW engineers. I'm just sayin that the Lexus LS has troubles with the amount of gears it has, and that it's continuously sorting through them.

I'm not saying that that will dictate the future of this transmission.
yeah, I remember reading an article about 7spd tranny causing some trouble.
Im sure BMW is aware of such problem. lets see how they work it out.
__________________
06 AW E90 330i ZPP/ZSP/Step/Expired Warranty

: Prior Design Front : ACS Rear : ACS Roof : BlackLines : Simota Intake : Carbon Fiber Interior Trim :
: MTEC V3 : 24% Charcoal : V1 Hardwired : Solaris Invisibulbs/LED interior :
lux.sh is offline   United_States
0
Reply With Quote
      04-14-2008, 10:56 PM   #16
Year's_End
RWD only.
 
Year's_End's Avatar
 
Drives: '08 E92 335i
Join Date: Feb 2007
Location: St. Pete, FL

Posts: 12,294
iTrader: (0)

The LS actually uses an 8spd.^
__________________
E92 335i: Space Grey|Coral Red|Aluminum Trim

Future Ride: 2015 Mustang GT Premium |Guard|401A|PP|Recaros|6MT
Year's_End is offline   United_States
0
Reply With Quote
      04-14-2008, 11:03 PM   #17
ianbiz
4th E90
 
ianbiz's Avatar
 
Drives: German
Join Date: Jul 2007
Location: Melbourne/Orlando, Florida

Posts: 5,136
iTrader: (7)

Send a message via AIM to ianbiz
they need 10.
__________________
Ian
06 325 06 330 06 330 07 335 11 335 Msport
ianbiz is offline   United_States
0
Reply With Quote
      04-14-2008, 11:07 PM   #18
BK
Smiling politely
 
Drives: 330i
Join Date: Feb 2006
Location: Washington DC

Posts: 7,916
iTrader: (0)

Garage List
2006 330i  [4.50]
I feel like 8 gears is too many, too. Although, I read a review of the DCT M3 that mentioned the author was cruising in 7th gear at 65 mph and was at... I don't know, maybe 3.5K RPM? Whatever it was, it seemed awfully high in the RPMs, even for an 8400 RPM car. Maybe an 8th gear would be worthwhile for saving gas on long highway trips.
__________________


330i | Black Sapphire | Beige + Burl | Sport | Premium | Cold | Nav | CA | Sat prep
BK is offline   United_States
0
Reply With Quote
      04-14-2008, 11:08 PM   #19
lux.sh
missing two turbos.
 
lux.sh's Avatar
 
Drives: fast around corners.
Join Date: Sep 2005
Location: Curves

Posts: 4,860
iTrader: (12)

Garage List
Quote:
Originally Posted by Bimmer Loyalist View Post
The LS actually uses an 8spd.^
thank you for correcting. I went back into my bathroom where all my magazines are to confirm.
__________________
06 AW E90 330i ZPP/ZSP/Step/Expired Warranty

: Prior Design Front : ACS Rear : ACS Roof : BlackLines : Simota Intake : Carbon Fiber Interior Trim :
: MTEC V3 : 24% Charcoal : V1 Hardwired : Solaris Invisibulbs/LED interior :
lux.sh is offline   United_States
0
Reply With Quote
      04-14-2008, 11:18 PM   #20
Year's_End
RWD only.
 
Year's_End's Avatar
 
Drives: '08 E92 335i
Join Date: Feb 2007
Location: St. Pete, FL

Posts: 12,294
iTrader: (0)

LOL^
__________________
E92 335i: Space Grey|Coral Red|Aluminum Trim

Future Ride: 2015 Mustang GT Premium |Guard|401A|PP|Recaros|6MT
Year's_End is offline   United_States
0
Reply With Quote
      04-14-2008, 11:42 PM   #21
mapezzul
Special Agent
 
mapezzul's Avatar
 
Drives: Depends on the day!
Join Date: Jul 2005
Location: Bavaria

Posts: 1,736
iTrader: (1)

Quote:
Originally Posted by Bimmer Loyalist View Post
Wow, I never doubted the "smartass" BMW engineers. I'm just sayin that the Lexus LS has troubles with the amount of gears it has, and that it's continuously sorting through them.

I'm not saying that that will dictate the future of this transmission.
You are correct in stating the LS, ISF has issues with "hunting" for gears. The Aisan sourced unit those cars use is just the same old transmission with a few extra gears.

BMW specifically did not want this issue to occur and that is why they have not had more than a 6 auto until well... this is released. The new design is more efficient and the shifting will be smoother and decisive, they would have it no other way.

The gearing will be specific to the car, as well as the programs.
mapezzul is offline   United_States
0
Reply With Quote
      04-15-2008, 12:33 AM   #22
jhv
Lieutenant General
 
jhv's Avatar
 
Drives: Every Day
Join Date: Apr 2007
Location: Los Angeles

Posts: 17,307
iTrader: (1)

Quote:
Originally Posted by 335destroyer View Post
but doesnt the isf have 8 speed auto
...? yes.
jhv is offline   No_Country
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 12:02 PM.




7post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST