Lnf Tranny
10-29-2007, 01:48 AM
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Lnf Tranny
Ok guys before I get flamed for starting a new LNF thread, here me out. I've been reading the other threads and have noticed that no one really talks about the tranny. Ok as I understand from all of the threads that the new balt shares the exact same engine and tranny as the hhr ss. Well the tranny has the "NO-LIFT SHIFT" thing that most think just means you can stay on the gas while shiffting. But if you look at no lift shifting in drag cars it means theres no clutch involved and basically you just shift. So I looked at some pics from the hhr ss interior and sure enough theres no clutch pedal. Take a look let me know what you think.-----http://www.hhrclub.org/galleries/2008-chevy-hhr-ss/-------at the bottom theres a pic looking at the steering wheel and theres no clutch.
10-29-2007, 01:54 AM
#4
10-29-2007, 01:57 AM
#5
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Originally Posted by THE BIG SITE STICKY
Transmission
Backing the turbocharged engine is a standard GM Powertrain Sweden F35 five-speed manual transmission. Semi-synthetic transmission fluid is used for its capability of absorbing heat and resisting breakdown during high-performance driving.
A performance-oriented feature referred to as “no-lift shift” allows maximum performance – upshifts can be performed very quickly without lifting the throttle. An algorithm in the engine’s controller enables this high-performance feature, which helps maximize acceleration and gear changes.
A short-throw shifter with stiffened shifter bushings and modified cables and attachments enhances confidence behind the wheel, giving the driver a firmer, more direct and quicker shift feel. A limited-slip differential is available with the manual transmission.
Backing the turbocharged engine is a standard GM Powertrain Sweden F35 five-speed manual transmission. Semi-synthetic transmission fluid is used for its capability of absorbing heat and resisting breakdown during high-performance driving.
A performance-oriented feature referred to as “no-lift shift” allows maximum performance – upshifts can be performed very quickly without lifting the throttle. An algorithm in the engine’s controller enables this high-performance feature, which helps maximize acceleration and gear changes.
A short-throw shifter with stiffened shifter bushings and modified cables and attachments enhances confidence behind the wheel, giving the driver a firmer, more direct and quicker shift feel. A limited-slip differential is available with the manual transmission.
how can you not see the 3 pedels? You need to up the brightness on your monitor if you cant see them:
I have to say that the gauge cluster is NUTS!
Last edited by REIGN SS; 10-29-2007 at 01:57 AM. Reason: Automerged Doublepost
10-29-2007, 02:01 AM
#8
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lets try this again: A performance-oriented feature referred to as no-lift shift allows maximum performance upshifts can be performed very quickly without lifting the throttle. An algorithm in the engines controller enables this high-performance feature, which helps maximize acceleration and gear changes.
Basically the computer cuts the throttle when you engauge the cutch under heavy acceleration.
Basically the computer cuts the throttle when you engauge the cutch under heavy acceleration.
10-29-2007, 02:15 AM
#14
As far as I know, it basically is just a rev-limiter type thing, it allows the car to keep the power up, its not as harsh as the stock rev limiter but lets the car hold boost and therefore torque while you shift. Its really nothing special, but I'm hoping that the clutch is much stronger than the SS/SC or they won't be lasting too long. Besides, every new kid who wants to try that feature out while driving every day is going to burn out a clutch pretty fast. Its just powershifting with a soft-touch rev limiter.
10-29-2007, 02:17 AM
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i am looking into for an entirely different reason...I want it for some of the hills i get stuck in traffic on and dont like slipping the clutch as much i could just keep the throttle down and go
10-29-2007, 02:24 AM
#18
Right, its not what you want. You need hill-assist control, which holds the brakes for you until you get the car going forward, I think Saab offers it and maybe some others, but you will still be using the clutch as much as any decent driver who just has his foot on the brakes. LIGHT slipping of the clutch on a hill isn't going to hurt anything, unless you are using the clutch to hold the car on the slant, not the brakes. That could cause issues with heat buildup.
10-29-2007, 02:33 AM
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i'm just overly paranoid about slipping it too much i just get stuck on 60* slopes in traffic and i just think that the clutch is slowly getting ripped apart
10-29-2007, 03:18 AM
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I don't know all that much about the no-lift shift system, but what I have been able to figure out (from a fair amount of reading) is that most people that talk about this feature don't have a damn clue what they are talking about.... /rant
Keep in mind the following is pure speculation, and not necessarily factual in any way.
From the way the system is described, it sounds as though the computer will adjust the amount of fuel dependant on the clutch pedal depression. This would basically mean that as you put your foot on the clutch, the throttle body closes as if you were releasing the accelator. As you release the clutch, the throttle body opens again at a set ratio which is compared to the clutch pedal position.
This would do a lot of things to improve the quality and precession/speed of the shifts. Firstly, it would eliminate the need for the driver to learn the clutch/accelator ratio for a clean shift. Secondly, by having the computer system control how much fuel is delivered to the engine, this will prevent the engine RPM from climbing between shifts and help eliminate common wear and tear caused by "power shifting".
Powershifting (a.k.a. flat shifting, full throttle shift, or clutchless shift) is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered.
Since the accelator, brake and clutch pedals are all electronic, this system is very possible. But again.. pure speculation on my part.
Keep in mind the following is pure speculation, and not necessarily factual in any way.
From the way the system is described, it sounds as though the computer will adjust the amount of fuel dependant on the clutch pedal depression. This would basically mean that as you put your foot on the clutch, the throttle body closes as if you were releasing the accelator. As you release the clutch, the throttle body opens again at a set ratio which is compared to the clutch pedal position.
This would do a lot of things to improve the quality and precession/speed of the shifts. Firstly, it would eliminate the need for the driver to learn the clutch/accelator ratio for a clean shift. Secondly, by having the computer system control how much fuel is delivered to the engine, this will prevent the engine RPM from climbing between shifts and help eliminate common wear and tear caused by "power shifting".
Powershifting (a.k.a. flat shifting, full throttle shift, or clutchless shift) is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered.
Since the accelator, brake and clutch pedals are all electronic, this system is very possible. But again.. pure speculation on my part.
10-29-2007, 03:24 AM
#22
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I don't know all that much about the no-lift shift system, but what I have been able to figure out (from a fair amount of reading) is that most people that talk about this feature don't have a damn clue what they are talking about.... /rant
Keep in mind the following is pure speculation, and not necessarily factual in any way.
From the way the system is described, it sounds as though the computer will adjust the amount of fuel dependant on the clutch pedal depression. This would basically mean that as you put your foot on the clutch, the throttle body closes as if you were releasing the accelator. As you release the clutch, the throttle body opens again at a set ratio which is compared to the clutch pedal position.
This would do a lot of things to improve the quality and precession/speed of the shifts. Firstly, it would eliminate the need for the driver to learn the clutch/accelator ratio for a clean shift. Secondly, by having the computer system control how much fuel is delivered to the engine, this will prevent the engine RPM from climbing between shifts and help eliminate common wear and tear caused by "power shifting".
Powershifting (a.k.a. flat shifting, full throttle shift, or clutchless shift) is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered.
Since the accelator, brake and clutch pedals are all electronic, this system is very possible. But again.. pure speculation on my part.
Keep in mind the following is pure speculation, and not necessarily factual in any way.
From the way the system is described, it sounds as though the computer will adjust the amount of fuel dependant on the clutch pedal depression. This would basically mean that as you put your foot on the clutch, the throttle body closes as if you were releasing the accelator. As you release the clutch, the throttle body opens again at a set ratio which is compared to the clutch pedal position.
This would do a lot of things to improve the quality and precession/speed of the shifts. Firstly, it would eliminate the need for the driver to learn the clutch/accelator ratio for a clean shift. Secondly, by having the computer system control how much fuel is delivered to the engine, this will prevent the engine RPM from climbing between shifts and help eliminate common wear and tear caused by "power shifting".
Powershifting (a.k.a. flat shifting, full throttle shift, or clutchless shift) is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered.
Since the accelator, brake and clutch pedals are all electronic, this system is very possible. But again.. pure speculation on my part.
sounds logical
10-29-2007, 08:00 PM
#25
I don't know all that much about the no-lift shift system, but what I have been able to figure out (from a fair amount of reading) is that most people that talk about this feature don't have a damn clue what they are talking about.... /rant
Keep in mind the following is pure speculation, and not necessarily factual in any way.
From the way the system is described, it sounds as though the computer will adjust the amount of fuel dependant on the clutch pedal depression. This would basically mean that as you put your foot on the clutch, the throttle body closes as if you were releasing the accelator. As you release the clutch, the throttle body opens again at a set ratio which is compared to the clutch pedal position.
This would do a lot of things to improve the quality and precession/speed of the shifts. Firstly, it would eliminate the need for the driver to learn the clutch/accelator ratio for a clean shift. Secondly, by having the computer system control how much fuel is delivered to the engine, this will prevent the engine RPM from climbing between shifts and help eliminate common wear and tear caused by "power shifting".
Powershifting (a.k.a. flat shifting, full throttle shift, or clutchless shift) is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered.
Since the accelator, brake and clutch pedals are all electronic, this system is very possible. But again.. pure speculation on my part.
Keep in mind the following is pure speculation, and not necessarily factual in any way.
From the way the system is described, it sounds as though the computer will adjust the amount of fuel dependant on the clutch pedal depression. This would basically mean that as you put your foot on the clutch, the throttle body closes as if you were releasing the accelator. As you release the clutch, the throttle body opens again at a set ratio which is compared to the clutch pedal position.
This would do a lot of things to improve the quality and precession/speed of the shifts. Firstly, it would eliminate the need for the driver to learn the clutch/accelator ratio for a clean shift. Secondly, by having the computer system control how much fuel is delivered to the engine, this will prevent the engine RPM from climbing between shifts and help eliminate common wear and tear caused by "power shifting".
Powershifting (a.k.a. flat shifting, full throttle shift, or clutchless shift) is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered.
Since the accelator, brake and clutch pedals are all electronic, this system is very possible. But again.. pure speculation on my part.