8 spd auto
Thread Starter
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
8 spd auto
looks like the new 8 spd will be hitting a junkyard near me soon.
I've been contemplating tranny swapping in a variety of project cars;
c5 ttix 800 hp currently RPM 4L65E lvl 5
c3 corvette restomod (*BB 496 chevy or tt 4.8 LS motor)
as I understand it the new 8 speed has gone back to an external controller which is good
it's strong and has advanced shifting capabilities
anyone know if this tranny will be a candidate for swaps??
seems like it has all I need, is relatively compact, and strong
all to the good. now the electronics and control (programming ect..) seems to be a scarey place with these new trannies
like to get a ride in a new 8 spd and see if anyone is up to speed on what it will take to swap these into an older vehicle
I understand they will have a "vette version" and a "truck version" as the bell housing in integrated into the tranny case
this might be years out, but I'm scheming it out now!!
I've been contemplating tranny swapping in a variety of project cars;
c5 ttix 800 hp currently RPM 4L65E lvl 5
c3 corvette restomod (*BB 496 chevy or tt 4.8 LS motor)
as I understand it the new 8 speed has gone back to an external controller which is good
it's strong and has advanced shifting capabilities
anyone know if this tranny will be a candidate for swaps??
seems like it has all I need, is relatively compact, and strong
all to the good. now the electronics and control (programming ect..) seems to be a scarey place with these new trannies
like to get a ride in a new 8 spd and see if anyone is up to speed on what it will take to swap these into an older vehicle
I understand they will have a "vette version" and a "truck version" as the bell housing in integrated into the tranny case
this might be years out, but I'm scheming it out now!!
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
looks like the new 8 spd will be hitting a junkyard near me soon.
I've been contemplating tranny swapping in a variety of project cars;
c5 ttix 800 hp currently RPM 4L65E lvl 5
c3 corvette restomod (*BB 496 chevy or tt 4.8 LS motor)
as I understand it the new 8 speed has gone back to an external controller which is good
it's strong and has advanced shifting capabilities
anyone know if this tranny will be a candidate for swaps??
seems like it has all I need, is relatively compact, and strong
all to the good. now the electronics and control (programming ect..) seems to be a scarey place with these new trannies
like to get a ride in a new 8 spd and see if anyone is up to speed on what it will take to swap these into an older vehicle
I understand they will have a "vette version" and a "truck version" as the bell housing in integrated into the tranny case
this might be years out, but I'm scheming it out now!!
I've been contemplating tranny swapping in a variety of project cars;
c5 ttix 800 hp currently RPM 4L65E lvl 5
c3 corvette restomod (*BB 496 chevy or tt 4.8 LS motor)
as I understand it the new 8 speed has gone back to an external controller which is good
it's strong and has advanced shifting capabilities
anyone know if this tranny will be a candidate for swaps??
seems like it has all I need, is relatively compact, and strong
all to the good. now the electronics and control (programming ect..) seems to be a scarey place with these new trannies
like to get a ride in a new 8 spd and see if anyone is up to speed on what it will take to swap these into an older vehicle
I understand they will have a "vette version" and a "truck version" as the bell housing in integrated into the tranny case
this might be years out, but I'm scheming it out now!!
Burning Brakes
Joined: Feb 2006
Posts: 844
Likes: 46
From: Southaven MS
I'm sure anything can be done with the appropriate amount of money, but I'd bet it wont be financially responsible to complete this conversion. I could be wrong though considering the 7 speed has already been swapped.
Burning Brakes
Joined: Feb 2006
Posts: 844
Likes: 46
From: Southaven MS
What I meant was I don't think it would be an improvement, and would cost a fortune.
The way I understand it the 8 speed is fully integrated into the new corvette, which makes it work very well on the road course in that car. I don't think you could integrate it with a C5 and get the same results. I'm sure it could be made to move the car with 8 speeds, but not shift the same way it does in the C7 because it would have no way of gathering all the telemetry data the C7 can provide its controller.
If it does work, and makes your corvette better, then I would love to hear about your results. This is why owning a car like a corvette is great, because there are people like you who are willing to try something different.
The way I understand it the 8 speed is fully integrated into the new corvette, which makes it work very well on the road course in that car. I don't think you could integrate it with a C5 and get the same results. I'm sure it could be made to move the car with 8 speeds, but not shift the same way it does in the C7 because it would have no way of gathering all the telemetry data the C7 can provide its controller.
If it does work, and makes your corvette better, then I would love to hear about your results. This is why owning a car like a corvette is great, because there are people like you who are willing to try something different.
Drifting
Joined: Apr 2011
Posts: 1,801
Likes: 1
From: Tulsa Ok
Premium Supporting Vendor
Joined: Oct 2004
Posts: 23,599
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
That made me laugh.
Sometimes I open the door to my garage at home and look at my Daytona Eliminator, motorcycles, snow mobile, two single digit drag cars and a C6 road racer and think "well there's goes the kids college funds".
But I wouldn't go back and change things if I could, if your a modder, your a modder. Just the way it is. I'll work harder to put them threw school.
As far as the trans goes, I would sit back and wait to see what it is capable of first, then how will it be controlled before this even becomes a discussion.
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Instructor
Joined: Nov 2013
Posts: 142
Likes: 0
From: Christiansburg Virginia
Aren't those mutually exclusive? Being a modder (we ARE in FI/Nitrous!) and being responsible... My kids inheritance is sitting on top of my motor!! And I love it. No regrets. Maybe I would have a different attitude if she and her husband had decided to WORK rather than live off the the Gov't dole for the past 20 years!!
Thread Starter
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
as WC say, I spend most of my money on a good woman, fast cars, and good times, the rest unfortunately is wasted
the c7 architecture is very complex and retrofitting might not even be feasible. but where there is a will there is a way
I'm sure PCS will be working on a controller, and modding the cradle or updating to a 7 cradle isn't impossible
I'm always at least looking at the lunatic fringe as technology marches on and this tranny looks like an animal
I have a 4L65E from RPM that is MORE than fine for now.
but I'm also hard on the equipment
also looking at the 6l80E champion with a circle D conv seems to be holding up over 800 which is where I want to be
if we can master that build, surely the 8L80E will just be the next domino to fall
the c7 architecture is very complex and retrofitting might not even be feasible. but where there is a will there is a way
I'm sure PCS will be working on a controller, and modding the cradle or updating to a 7 cradle isn't impossible
I'm always at least looking at the lunatic fringe as technology marches on and this tranny looks like an animal
I have a 4L65E from RPM that is MORE than fine for now.
but I'm also hard on the equipment
also looking at the 6l80E champion with a circle D conv seems to be holding up over 800 which is where I want to be
if we can master that build, surely the 8L80E will just be the next domino to fall
Thread Starter
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
by keeping the engine above peak torq with lower splits between the gears the car should be faster
but yes, 4 spds DOES seem to be enough with monster torq and the low gear of the 8sp is REALLY low
I know some of the 6 spd 6l80e guys actually launch the car starting in second gear to reduce the torq and hook better and eliminate the big gap from 1st to 2nd
the factory engineers are smarter than me, if they saw a need for 8 gears with 650 ft lb to go faster, maybe there is something to it!
but yes, 4 spds DOES seem to be enough with monster torq and the low gear of the 8sp is REALLY low
I know some of the 6 spd 6l80e guys actually launch the car starting in second gear to reduce the torq and hook better and eliminate the big gap from 1st to 2nd
the factory engineers are smarter than me, if they saw a need for 8 gears with 650 ft lb to go faster, maybe there is something to it!
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
I don't think the 8 spd is a very good idea behind big power, forced induction setup... More clutches to burn up, more components to fail etc etc...not to mention even harder to tune and keep the quirks out of them.. Look how bad the 6l80s are after 600rwhp and no one can build one to last...an 8 spd will be even worse. Look at the C7 auto cars now, even LMR can't get one to shift right at the strip...
I'm surprised Dodge went with the 8 spd on the Hellcat, but after watching the vids and seeing how fast/quick that thing shifts (10x better then any GM 6 or 8 spd), I'm sub'd to see how long they last when Hellcats and their owners hit the strips.
If I were you, I'd stick with the RPM 4l60 and just save some pennies for the inevitable rebuild.
I'm surprised Dodge went with the 8 spd on the Hellcat, but after watching the vids and seeing how fast/quick that thing shifts (10x better then any GM 6 or 8 spd), I'm sub'd to see how long they last when Hellcats and their owners hit the strips.
If I were you, I'd stick with the RPM 4l60 and just save some pennies for the inevitable rebuild.
Melting Slicks
Joined: Jul 2004
Posts: 2,844
Likes: 144
From: Northern Ireland
I can see no benefit whatsoever from having 8 gears behind a large powerful V8 though.
If it was a small engine with a narrow power band, or a diesel with limited rpm's, then it would make sense.
Even on a n/a standard car it'd be pushing it. Although on the flip side, 4 speed etc is far beyond the last century..
But as long as I have two legs and arms, I wouldnt have an auto for "performance" use regardless.
Le Mans Master
Joined: Oct 2010
Posts: 7,373
Likes: 1,128
From: cold & windy
That made me laugh.
Sometimes I open the door to my garage at home and look at my Daytona Eliminator, motorcycles, snow mobile, two single digit drag cars and a C6 road racer and think "well there's goes the kids college funds".
But I wouldn't go back and change things if I could, if your a modder, your a modder. Just the way it is. I'll work harder to put them threw school.
...
Sometimes I open the door to my garage at home and look at my Daytona Eliminator, motorcycles, snow mobile, two single digit drag cars and a C6 road racer and think "well there's goes the kids college funds".
But I wouldn't go back and change things if I could, if your a modder, your a modder. Just the way it is. I'll work harder to put them threw school.
...
mom didn't have a dime to pay for my education.