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No more Launch Control in 2010 GTR

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Old Nov 24, 2008 | 08:18 AM
  #61  
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Check out post# 74 BriGuyMax

http://www.nagtroc.org/forums/index....ic=25920&st=60


Again All - these failures are a very small number we have no idea how far reaching the failures are on all GT-R's so far. One year from now we'll have a far better idea of how much of a problem this is for the entire GT-R fleet.
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Old Nov 24, 2008 | 08:20 AM
  #62  
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Originally Posted by blasian
You'd swear a thousand of them broke

There are now two owners on NAGTROC that ran 11.6x ETs without launch control.
Jasper ran an 11.8X something like that too right (no LC)?
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Old Nov 24, 2008 | 08:30 AM
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Originally Posted by BriGuyMax
The internals of the actual transmission are the SAME AS A CONVENTIONAL MANUAL. It is electronically controlled internally, it has the clutchs integrated into it and the rear diff, that's why it's so expensive.
There are three different physical types of transmissions installed in passenger cars these days.

1. Manual
2. Automatic
3. CVT

The trans in the GT-R doesn't have clutch packs and it's not a CVT...so there's only one option left.

If you don't believe me...I don't know what to tell you...but the trans in the GT-R is NOT an automatic.



Looks nothing like an auto/manual...no planatary gear sets. Re-build of this trans shouldn't technically be more expensive since the gears that are failing are just simple gears like a manual. There's no valve body to clean out, or anything to really adjust. That's assuming the electronic parts are easily removable an don't need to be replaced if removed...
im just old school, i prefer to push a clutch in myself. but that being that case i just don't understand how it would cost 20k to rebuild. being that new a tranny the electronics should be fine then just rebuild the gears that are tearing up. its just crazy
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Old Nov 24, 2008 | 08:37 AM
  #64  
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Originally Posted by GZire
Jasper ran an 11.8X something like that too right (no LC)?
I'm not sure

The local guy that ran a 11.69 started a thread on how he ran his time and asked others to try it out to get some consistency. I think he's going back Wednesday to try it out, he's trying to get another local GT-R owner to go with him.
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Old Nov 24, 2008 | 08:54 AM
  #65  
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Originally Posted by kramykram
i just don't understand how it would cost 20k to rebuild.
The same reason it costs over $300 for an oil change and new air filter on a Mercedes-Benz at a dealer....

I think the $20K quoted is for complete replacement of the transaxle + labor. Since the transaxle includes the clutch system, hydraulically actuated shift computers, rear diff and front torque controller, I could see how it can get expensive very quickly.
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Old Nov 24, 2008 | 08:55 AM
  #66  
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Originally Posted by GZire
Check out post# 74 BriGuyMax

http://www.nagtroc.org/forums/index....ic=25920&st=60


Again All - these failures are a very small number we have no idea how far reaching the failures are on all GT-R's so far. One year from now we'll have a far better idea of how much of a problem this is for the entire GT-R fleet.
Thx...I'll read through it and give my impressions (been around transmissions for a while now and have a pretty good idea of why certain things break).
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Old Nov 24, 2008 | 09:01 AM
  #67  
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Originally Posted by blasian
You'd swear a thousand of them broke
It amazing how the internet makes this issue look much bigger than it really is.

I have a friend that is the parts manager at one of the biggest Nissan dealers in TX and I guess he knows of one of the failures specifically. He said when they went through the ECU data the car had used LC with VDC off over 20 times in a little over a month that the owner had the car.

I consider myself an chronic abuser of my vehicles...but even I don't see a reason to need that kind of a launch over 20 times in a month. Even with a trip to the drag strip....
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Old Nov 24, 2008 | 09:06 AM
  #68  
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Originally Posted by BriGuyMax
It amazing how the internet makes this issue look much bigger than it really is.

I have a friend that is the parts manager at one of the biggest Nissan dealers in TX and I guess he knows of one of the failures specifically. He said when they went through the ECU data the car had used LC with VDC off over 20 times in a little over a month that the owner had the car.

I consider myself an chronic abuser of my vehicles...but even I don't see a reason to need that kind of a launch over 20 times in a month. Even with a trip to the drag strip....
lol the internet makes everything get blown out. maybe they might consider a standard hydralic tranny one day. the gtr is by far a beautiful car. the only 2 one of our local dealerships had sold them before they even got here to someone in cali, said he was gonna make a fortune on them there.
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Old Nov 24, 2008 | 03:11 PM
  #69  
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Originally Posted by BriGuyMax
Thx...I'll read through it and give my impressions (been around transmissions for a while now and have a pretty good idea of why certain things break).
Martin Donnon (sp?) also has another thread regarding their new transmission fluid. You should check that one out too. Between those two threads there's a whole ton of speculation and (hopefully) accurate impressions on what's going on with these gear failures.
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Old Nov 25, 2008 | 12:10 AM
  #70  
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Originally Posted by BriGuyMax
If you don't believe me...I don't know what to tell you...but the trans in the GT-R is NOT an automatic.
Care to explain how the GT-R's manual transmission is able to shift by itself then?
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Old Nov 25, 2008 | 12:53 AM
  #71  
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Originally Posted by Tac-M
well... try dumping your clutch on some sticky DR's 10-20 times with your engine making 500+ hp ...


so .... good move nissan.
with a twin disc clutch, beefy tranny and well made axels, rear diff.....they wouldnt have issues

they needa jack the price up 5 g's and beef things up
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Old Nov 25, 2008 | 08:06 AM
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Originally Posted by HDPDZO6
Care to explain how the GT-R's manual transmission is able to shift by itself then?
Did you not READ my post?? Do you need a complete explanation of what an automatic transmission is?

http://en.wikipedia.org/wiki/Automatic_transmission

Main components of an AUTOMATIC transmission

1. torque converter - GR6 doesn't have one
2. planetary gearset - GR6 doesn't have it
3. Clutchpacks and bands - GR6 doesn't have them
4. Valvebody - GR doesn't have one

The main difference between an AUTOMATIC and a MANUAL is there is no physical connection between the engine and the drive wheels in a auto, it's a fluid transfer. A manual transmission has a physical connection between the engine and the drive wheels.

Last edited by BriGuyMax; Nov 25, 2008 at 08:10 AM.
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Old Nov 25, 2008 | 08:14 AM
  #73  
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I've read over the posts about trans fluid in the GT-R and these are my conclusions.

The failure rate of the GR6 trans is VERY VERY low so far. That said it does seem that upgrading to a better trans fluid can significantly protect the GR6 from wear and stress. Although based on the VOIDING of the factory warranty with a fluid change, I would say only owners who really drive their cars hard or race them should worry about it.

The fact is, if you don't beat the crap out of your GT-R and the trans fails...Nissan is going to cover it for you. So for most everyday Joe GT-R owners this shouldn't even be of concern.
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Old Nov 25, 2008 | 10:24 AM
  #74  
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Originally Posted by BriGuyMax
The main difference between an AUTOMATIC and a MANUAL is there is no physical connection between the engine and the drive wheels in a auto, it's a fluid transfer. A manual transmission has a physical connection between the engine and the drive wheels.
Thanks for the Wiki link, however, I am quite aware of the physical differences between a traditional MT/AT. All that aside though;

What do you call a transmission that has the ability to shift on its own?

A. Automatic
B. Manual

Circle the correct answer please.

Last edited by HDPDZO6; Nov 25, 2008 at 10:31 AM.
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Old Nov 25, 2008 | 11:42 AM
  #75  
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Dictionary:
semantics
(sĭ-măn'tĭks) pronunciation

Home > Library > Literature & Language > Dictionary
n. (used with a sing. or pl. verb)

1. Linguistics. The study or science of meaning in language.
2. Linguistics. The study of relationships between signs and symbols and what they represent. Also called semasiology.
3. The meaning or the interpretation of a word, sentence, or other language form: We're basically agreed; let's not quibble over semantics.


(Answers.com)
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Old Nov 25, 2008 | 02:40 PM
  #76  
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Originally Posted by HDPDZO6
Thanks for the Wiki link, however, I am quite aware of the physical differences between a traditional MT/AT. All that aside though;

What do you call a transmission that has the ability to shift on its own?

A. Automatic
B. Manual

Circle the correct answer please.
calling the sequential tranny an "automatic" is wrong. it's what the ignorant general public would call it. GTR's tranny composition is nothing that resembles an AT. It's like calling a turbo a supercharger. they're both FI but different.

oh yeah.. you also lose less boost during shifts with the seq trannies, which makes it superior to an MT
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Old Nov 25, 2008 | 03:41 PM
  #77  
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Originally Posted by Cannysage
calling the sequential tranny an "automatic" is wrong. it's what the ignorant general public would call it. GTR's tranny composition is nothing that resembles an AT. It's like calling a turbo a supercharger. they're both FI but different.

oh yeah.. you also lose less boost during shifts with the seq trannies, which makes it superior to an MT
For one, I'm not debating the superiority of one type of transmission vs the next, however, the GT-R's transmission has the ability to shift on its own, without any driver's input. It is an automatic transmission, as it can shift on its own, without any driver's input. It is not a manual transmission, even though it shares many of the same components.
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Old Nov 25, 2008 | 04:14 PM
  #78  
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Originally Posted by blasian
You'd swear a thousand of them broke

There are now two owners on NAGTROC that ran 11.6x ETs without launch control.
Which is bound to happen once they know how to launch the car w/o it.

See...no need for LC. >.<
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Old Nov 25, 2008 | 04:43 PM
  #79  
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Originally Posted by HDPDZO6
For one, I'm not debating the superiority of one type of transmission vs the next, however, the GT-R's transmission has the ability to shift on its own, without any driver's input. It is an automatic transmission, as it can shift on its own, without any driver's input. It is not a manual transmission, even though it shares many of the same components.
technically, GT-R's transmission can also be called manual.. hence 'semi-manual.' you have a full control of when to change gears and what gear (unlike the tiptronics, which can be refered to as an AT).

SMG or sequential tranny of the gtr shouldn't really be called AT, but that's just me. even yahoo auto refers the gtr tranny as a manual..

http://autos.yahoo.com/nissan_gt_r_coupe-specs/
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Old Nov 25, 2008 | 07:36 PM
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I like to think that the Z06 is the next step from the 350Z and the GT-R is the next step from an STi or EVO
Why a measurement contest anytime either is mentioned
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