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Old 04-10-2008, 05:38 PM   #1
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Automatic Transmission concern...

I don't remember where I read it, but I could swear that I read somewhere the 'maro gets a 6 speed auto.

Lets just assume it does, and lets just assume it ends up being the same auto that is in the G8 GT.

Well, here's the concern, I check up on the G8 forums every now and then to see how people like the zeta platform, and check up on the L76 (in case we end up with that under the hood...). Anyway, onto the point, a few guys over there have complained about the shift speed in sport mode, and driver controlled mode, they say its rather slow... any chance this will be sped up a bit on our cars?
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Old 04-10-2008, 07:32 PM   #2
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I'm almost positive it will. The automatic mustangs slugish shift issue was adressed with the performance tune. And if not, Im sure a company like level 10 could hook you up. Furthermore, this is the same auto thats in the corvette and I don't think they are having problems with it?
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Old 04-10-2008, 07:52 PM   #3
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It is the same Transmission as the 'Vette: The Hydramatic 6L80.

The early auto Corvettes had a sluggish shift time, I guess, when using the paddles. You'd have to shift anywhere from 500 to 700 rpms early so that you wouldn't hit the redline, have the fuel cut-off kick in, and generally kill your times.

'08 they fixed that, and the magazine testers reported a noticeable "crispness" to the auto that wasn't there in the LS2 'Vettes. In the LS3 Corvette, 0-60 times differ between the two trannys in that the Manual is only .1 seconds faster to 60 mph than the Automatic. I don't know about you...but I think that's impressive.

Of course, I don't belong to any G8 sites, nor do I know anybody who has one, but I haven't heard of this issue before now. This could, of course, be people who've driven Manuals all their lives, or people who will try and find a problem with everything....OR it could be a legitimate problem. I don't think GM would skimp on anything with the Camaro, though.
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Old 04-10-2008, 08:08 PM   #4
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You're probly right, most likely the same people that were crying because there was no manual in the G8.

I'm not too worried, I know GM will do us right
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Old 04-10-2008, 08:19 PM   #5
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Back in the old days...when i had a First Gen car, you could purchase a relatively inexpensive item called a "Shift-Kit" that essentially consisted of a thin sheet of metal that you placed between the valve body of the tranny and the base. If I recall, you also removed some small bearings. The end result was much quicker shifting and in fact you could chirp the tires when you hit second gear. Which was always really cool to do in an automatic.

Does anyone know if these types of upgrades are available on today's automatics?

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Old 04-10-2008, 08:26 PM   #6
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Back in the old days...when i had a First Gen car, you could purchase a relatively inexpensive item called a "Shift-Kit" that essentially consisted of a thin sheet of metal that you placed between the valve body of the tranny and the base. If I recall, you also removed some small bearings. The end result was much quicker shifting and in fact you could chirp the tires when you hit second gear. Which was always really cool to do in an automatic.

Does anyone know if these types of upgrades are available on today's automatics?

Ron
oh yeah, they are still available. also with most transmissions being computer controlled, you can hook up a programmer and adjust your shift points and the line pressure, which will give you a more noticable "kick"

some people who have 4th gen t/a's have a "performance mode" shift button on the center console that firms up the shifting points. as for the shift kits today, they do the same thing they did back in the day, they reroute the fluid going thru the tranny.

if anyone has ever pulled the pan off an auto and looked at the maze underneath its a wonder how it all works. but the shift kit plates allow fluid thru certain passages as well as some having upgraded springs and solenoids so you can choose your level of performance
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Old 04-10-2008, 09:19 PM   #7
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Wait, by sport mode do we mean a more aggressive automatic mode or manual shifting? I usually refer to the first as "sport mode" and the second as "manual mode" but it seems that we're using them interchangeably here. Manual modes on true automatics are generally pretty slow, but "sport" mode should be pretty fast.
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Old 04-10-2008, 09:26 PM   #8
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sport mode meaning manual shifting, or sometimes called something like "manu-matic" i think.
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Old 04-10-2008, 10:24 PM   #9
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Sport mode can mean a couple of things, really...

The Automatics GM now uses ('cept the 4 speed) all have (in some form or another) a "P", "R", "N", "D", and "S" mode.

When in "D" it's acts as your normal Automatic. In "S" mode (Sport/Performace), the more advanced tranny's learn your driving technique, and adapt to know when to shift, and when not to. For instance, when you let off the gas to go around a corner? It won't shift into OD. Also in "S" mode, you can press the paddles, tap the shifter, etc to change gears. From the first tap/pull/push, the shifting from then on is driver controlled. To end this feature, you need to shift back into "D".

This is how I understand it works in the Corvette.
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Old 04-11-2008, 09:04 AM   #10
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In "S" mode (Sport/Performace), the more advanced tranny's learn your driving technique, and adapt to know when to shift, and when not to.
"Sport" mode in most trannies, AFAIK, isn't any more driver-adapted, just more aggressively programmed. "Tow/haul" mode in my GM truck is approximately the same, I believe; higher shift points, less likely to shift into OD, and less upshifting when coasting. It sure makes my truck more responsive and better in congested traffic.

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if anyone has ever pulled the pan off an auto and looked at the maze underneath its a wonder how it all works.


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Old 04-11-2008, 10:12 AM   #11
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Sport mode can mean a couple of things, really...

The Automatics GM now uses ('cept the 4 speed) all have (in some form or another) a "P", "R", "N", "D", and "S" mode.

When in "D" it's acts as your normal Automatic. In "S" mode (Sport/Performace), the more advanced tranny's learn your driving technique, and adapt to know when to shift, and when not to. For instance, when you let off the gas to go around a corner? It won't shift into OD. Also in "S" mode, you can press the paddles, tap the shifter, etc to change gears. From the first tap/pull/push, the shifting from then on is driver controlled. To end this feature, you need to shift back into "D".

This is how I understand it works in the Corvette.
From what I've read the G8's auto has three modes.

D: just what you think it is.

Sport: A more aggressive, fully automatic mode that you access by moving the shifter over to the right into the manual mode area but don't tap up or down.

Manual: In this mode the transmission will not upshift itself, it'll just bounce off the rev limiter until you notice. I think it will automatically downshift to 2nd at a stop. It might downshift earlier if the alternative is to lug and stall (uphill at 20mph in 6th). It will also refuse to downshift if that would push the engine over the redline.

I think that GM will try to make the feel Camaro sportier than the G8. So the Camaro’s A6 will probably get a more aggressive tune, more like the Corvette’s.
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Old 04-11-2008, 10:24 AM   #12
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Wait, by sport mode do we mean a more aggressive automatic mode or manual shifting? I usually refer to the first as "sport mode" and the second as "manual mode" but it seems that we're using them interchangeably here. Manual modes on true automatics are generally pretty slow, but "sport" mode should be pretty fast.
more agressive automatic shifting. it firms up the line pressure to deliver harder shifts. the thing is with "manual mode" on autos is that you can down shift and whatnot or start in a lower gear and hold it there longer before shifting up. but unless your tranny is built stronger than stock it will wear and tear on it. the only way to have a true manu-matic is by installing a manual valve body in your auto so that you have to shift up when driving, no more just putting it in OD and rolling as if you put it in OD, you wont start in 1st and go thru the gears on its own, it will be in 4th gear when you take off.
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Old 04-11-2008, 11:12 AM   #13
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the only way to have a true manu-matic is by installing a manual valve body[...]
There are decent automated manuals which may count as "manu-matic" by your standard too:
http://en.wikipedia.org/wiki/Direct-Shift_Gearbox
http://en.wikipedia.org/wiki/Sequential_manual_gearbox
They're pretty impressive technology.
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Old 04-11-2008, 12:05 PM   #14
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and those of you who want paddle shifters for your gm transmission

http://www.retrotekspeed.com/product...th-f1-paddles/

1500 bucks aint a bad price to get paddle shifting. however 4l60e owners will need to purchase an additional control harness to plug into the computer as after 94 our trannys were computer controlled
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Old 04-11-2008, 12:56 PM   #15
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more agressive automatic shifting. it firms up the line pressure to deliver harder shifts. the thing is with "manual mode" on autos is that you can down shift and whatnot or start in a lower gear and hold it there longer before shifting up. but unless your tranny is built stronger than stock it will wear and tear on it. the only way to have a true manu-matic is by installing a manual valve body in your auto so that you have to shift up when driving, no more just putting it in OD and rolling as if you put it in OD, you wont start in 1st and go thru the gears on its own, it will be in 4th gear when you take off.
I'm confused...besides the actual way it works (i.e. Computer controlled, or manual valve body)...what's the difference? I just find it difficult to believe GM wouldn't build the A6 to withstand any "wear and tear"
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Old 04-11-2008, 02:00 PM   #16
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I'm confused...besides the actual way it works (i.e. Computer controlled, or manual valve body)...what's the difference? I just find it difficult to believe GM wouldn't build the A6 to withstand any "wear and tear"
the shifting points and line pressure and whatnot are computer controlled with the 4l60e. meaning that if you put it in 1st (most) will stay in first till you put it into 2nd. at which point you will have a slight delay because from the time you put it into 2nd, the computer then realizes that it can go to the next gear, then allows the tranny to shift.
tho some transmissions will still upshift if you take it to redline if you dont reprogram it.


as for a manual valve body. whatever gear you select is what gear it is in. so if you put it in to D (3rd) you will take off in that gear. it wont start in first then go to second then to 3rd, it will be in 3rd from the get-go. so you would have to run thru the gears while you drive.

now as far as gm building subpar drivetrain components. look at the 10 bolt rear on the 4th gen camaros. with street tires they are fine, but throw some slicks on there and be prepared to break something.
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Old 04-11-2008, 02:10 PM   #17
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"Sport" mode in most trannies, AFAIK, isn't any more driver-adapted, just more aggressively programmed. "Tow/haul" mode in my GM truck is approximately the same, I believe; higher shift points, less likely to shift into OD, and less upshifting when coasting. It sure makes my truck more responsive and better in congested traffic.





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