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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 05-25-2009, 04:18 PM   #1
calflan
 
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Manual shift - 1-4 ?

What exactly is 1 - 4 shift ? According to the Quick Refernce Manual on this site, it is for MPG and when the shift light comes on, shift only from 1st to 4th or damage the tranny ? Have I read this right ?
What is the shift sequence looking at and why could'nt I go from 1st to 2nd and 3rd to 4th ?
Anyone shed some light on this and what is trying to achieve ?
Thanks
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Old 05-25-2009, 04:29 PM   #2
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Quote:
Originally Posted by calflan View Post
What exactly is 1 - 4 shift ? According to the Quick Refernce Manual on this site, it is for MPG and when the shift light comes on, shift only from 1st to 4th or damage the tranny ? Have I read this right ?
What is the shift sequence looking at and why could'nt I go from 1st to 2nd and 3rd to 4th ?
Anyone shed some light on this and what is trying to achieve ?
Thanks
Probably won't apply to the LLT cars. the 1-4 is a skip-shift mechanism that forces, at low speeds, a 1 to 4 shift in order to save fuel. Concept has been around for quite some time.

No one has received a 6spd manual V6 yet.
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Old 05-25-2009, 05:22 PM   #3
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V6 cars DO NOT HAVE skip-shift, only the V8's ... per many previous posts on this subject.

As far as what is "SKIP-SHIFT", it is an electrically operated "mechanical gate" that forces you to shift from 1st to 4th under light accelleration ... basically blocks 2nd gear.

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Old 05-25-2009, 05:45 PM   #4
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It's a very dumb idea, I don't think GM's fault.

Did anyone bother to look at damage it does by forcing a super high load on the engine components?

That's why gears exist lower to higher so that the load on the flywheel from is lighter and it can rev up. This is like more stress on the crankshaft and bearings.

It's just wrong.
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Old 05-25-2009, 05:55 PM   #5
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so when would you use this? just when daily driving? it blocks you from running through the gears?
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Old 05-25-2009, 06:01 PM   #6
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Some ****hole that drives a black prius and is a politician not a scientist came up with the idea. It's those *****ing hypermilers and the like.

They don't care if you have to rebuilt the bottom earlier. As long as your not killing the polar bears they are just content as can be getting into your car and keeping you from shifting gears on YOUR OWN *****ING transmission hehe.

Can you tell it get's under my skin a tad??
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Old 05-25-2009, 06:07 PM   #7
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So let's clear up a few things:

CAGS (Computer Aided Gear Shift - what it used to be known as) has been present for almost 2 decades now. I had it on my f-bodies, I had it on my viper. It's not a new concept.

It *ONLY* is in effect at low speeds and part throttle conditions. It does NOT prevent you from shifting into gear under load, and thus there is *NO* stressful impact. It does however, drop the rev's between shifts (obviously). Now, if you're doing slow starts and crusing, this isn't a problem.

You may ask who invented it? Engineers who wanted to reach a specified MPG number using as many tricks as they can. It also reduces the stress on the 2nd gear syncro -- one of the most stressed out and abused pieces in a manual gearbox.

If anyone is seriously stressed about having this feature on their manual (to which V6 guys do not need worry), then there are ways to bypass it. Short of that... quit whining about it

Hope that helps.
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Old 05-26-2009, 06:03 AM   #8
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Quote:
Originally Posted by MadMaxx View Post
So let's clear up a few things:

CAGS (Computer Aided Gear Shift - what it used to be known as) has been present for almost 2 decades now. I had it on my f-bodies, I had it on my viper. It's not a new concept.

It *ONLY* is in effect at low speeds and part throttle conditions. It does NOT prevent you from shifting into gear under load, and thus there is *NO* stressful impact. It does however, drop the rev's between shifts (obviously). Now, if you're doing slow starts and crusing, this isn't a problem.

You may ask who invented it? Engineers who wanted to reach a specified MPG number using as many tricks as they can. It also reduces the stress on the 2nd gear syncro -- one of the most stressed out and abused pieces in a manual gearbox.

If anyone is seriously stressed about having this feature on their manual (to which V6 guys do not need worry), then there are ways to bypass it. Short of that... quit whining about it

Hope that helps.


i don't think many people have been driving manuals very long or just have no clue about cars and how they work or working on them

seriously have nobody skipped gears to save gas, you do not need all the gears all the time, as long as you aren't stalling the engine or riding the clutch your fine

and skipping gears does absolutely zero damage, it actually helps by causing less wear
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Old 05-26-2009, 10:11 AM   #9
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Thanks alot guys, my mistake not reading better. I did'nt note it is V8 only. I'm getting a V6.
Not sure I like the idea of the 1 - 4 though. You'd think going from 1 to 4, especially under low loaded condtions as they imply - for better MPG - would tend to create ore bogged down conditions, less torque and carbon up injectors and spark plugs. No thanks, but I suppose the V8 will burn it off better than the 6 and avoid this.
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Old 05-26-2009, 10:26 AM   #10
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^ There is no difference from a buildup perspective (or displacement perspective). Really, folks are blowing this far out of proportion
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Old 11-14-2009, 07:57 PM   #11
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One to Four shifts

I have a 1SS with the six speed manual. The one to four "computer aided" shift is a pain. A couple of times per day this "feature" kicks in when I am least expecting it. Usually when some idiot with a 4x4 is tailgating me.

This is my sixth Camaro. And it is the best car I have ever owned.
But playing guessing games with a computer when I am in heavy traffic takes a lot away from the experience. Trying to out-guess the other drivers on the road is enough of a challenge.
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Old 11-15-2009, 12:45 PM   #12
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Quote:
Originally Posted by MMX_SS View Post
I have a 1SS with the six speed manual. The one to four "computer aided" shift is a pain. A couple of times per day this "feature" kicks in when I am least expecting it. Usually when some idiot with a 4x4 is tailgating me.

This is my sixth Camaro. And it is the best car I have ever owned.
But playing guessing games with a computer when I am in heavy traffic takes a lot away from the experience. Trying to out-guess the other drivers on the road is enough of a challenge.

There is a cheap fix available for only a few bucks. Do a seach on this site as it has been discussed before. It's a resister type of gizmo that attaches to the transmission tunnel under the car. Fools the computor and doesn't throw codes. Just make sure you attach it to the correct spot and not the reverse-lockout connector.
Had it on my 4th gen and is a royal pain in the butt, as you found out, it seems to happen mostly when you are not expecting it. Then you end up with the gear lever floating around in neutral trying to find fourth.

Cheers.
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Old 11-17-2009, 09:44 PM   #13
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my 1995 corvette has it
ps. its for sale
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Old 11-22-2009, 05:33 AM   #14
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the cheap fix is slp skip shift eliminator you can get it from jegs, summit or off of slp's site. i just ordered one for mine tonight from jegs.
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Old 11-25-2009, 10:55 AM   #15
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i don't think many people have been driving manuals very long or just have no clue about cars and how they work or working on them

seriously have nobody skipped gears to save gas, you do not need all the gears all the time, as long as you aren't stalling the engine or riding the clutch your fine

and skipping gears does absolutely zero damage, it actually helps by causing less wear


Sorry, don't know how to quote. But I can't wrap my head around this skip shift. I have skipped gears before to save on gas, but the V8 camaro tells you to shift way too early from 1st to 4th. When I shift when I am "told" by the car, the RPM is barely at 1,000. Is something broken? I usually just step on it, or slow down to allow to shift into fourth, or second. Any advice?
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Old 12-01-2009, 11:05 AM   #16
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Its a headache is what it is. It always makes me shift to 4th way too early making it go below 1000 rpms usually around 800 or less. Learning to get around it though ,it will go away after a couple of seconds thankfully.
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Old 12-01-2009, 11:10 AM   #17
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Get a tune and you won't see it anymore. Even before I got a tune, the skip-shift only came on a few times for me. If you are granny driving in 1st gear, it will come on and forces you to shift to 4th. It is not a big deal as most people seem to think. You just gotta learn to drive your SS manual car so it doesn't come on.
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Old 12-01-2009, 11:15 AM   #18
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True its only occasional but if it don't go away all i you gotta do is gun it and it disappears . If im not paying attention and it comes on i some times slip into 4th. Not gonna tune don't wanna void my warranty.
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Old 12-01-2009, 11:27 AM   #19
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So get a skip-shift Eliminator and you don't need a tune.
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Old 12-01-2009, 11:38 AM   #20
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I didnt mean I got a tune or anyone should get a tune just to get rid of the skip-shift. That's dumb. I was fine with the 1-4 display and it very rarely ever came on for me anyway. But a Magnuson 2300 sit atop my engine now, hence the tune.
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Old 02-13-2014, 10:02 AM   #21
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Originally Posted by Mhoward08 View Post
Its a headache is what it is. It always makes me shift to 4th way too early making it go below 1000 rpms usually around 800 or less. Learning to get around it though ,it will go away after a couple of seconds thankfully.
I've been learning manual transmission on my car and this 1-4 shit screws me up so much. I was trying to figure out how to avoid this thing because it just randomly blocks me from shifting into 2nd. It's so stupid! If I'm accelerating lightly, why the hell would you put me in 4th? I can do it myself! Hill assist would make more sense than this. So I have to stomp the gas to avoid having 2nd gear disabled? It's so random too, I've been trying to figure out how to avoid it.
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Old 02-13-2014, 10:19 AM   #22
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Skip shift eliminator was the first thing I added to my car when I got it. Well worth the $15, in my opinion.
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Old 02-13-2014, 10:36 AM   #23
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Any good tuning company can turn that off as well.
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