6 speed Allison
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Joined: Jan 2006
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From: Crossville TN
It should hold 600 hp as-it-is. Your problem will be to see if it is too big to fit in the standard tunnel area. That would be a "killer" combination. Make sure you get one that came out of a gas engine set-up. The controls unit can handle 2 different shift programs...so you could have one set up for normal driving and another set up for "kick-it-in-the-a$$". Six speed/ overdrive tranny with lockup-clutch! Love to see pics, if you do it. [P.S. I worked for Allison for 40 years; this is one honey of a transmission.]
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Joined: Apr 2007
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From: So Cal
4L80 weighs 255 wet and Allison weighs 330 dry. I would love to have the extra two gears. Everyone and their brother makes super strong 4L80's but I haven't found a shop that sells a 6-speed Allison that is built up. I wouldn't want to put in a stock one. Also, we were going to use "BIG STUFF" computer with the 4L80. Would that still work with the Allison. Also, would it eat up more power than the 4L80?
Not to mention, I get the feeling there is a reason I haven't been able to find anyone else that has done an Allison in a fast car. They've had the 5 speed version for a least a while now.
Not to mention, I get the feeling there is a reason I haven't been able to find anyone else that has done an Allison in a fast car. They've had the 5 speed version for a least a while now.
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Joined: Apr 2007
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From: So Cal
http://www.suncoastconverters.com/gmc/gm_products.html
Just found this but I don't I still need to find out if I could get a computer controller for it and also if it would bolt up to the 540.
Just found this but I don't I still need to find out if I could get a computer controller for it and also if it would bolt up to the 540.
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
Buy one out of a wrecked Sierra pickup..with the tranny computer. The hard part will be finding someone who can properly integrate the tranny and engine operating systems. Sure would be a hoot! P.S. My point in above entry is that you don't need to "beef up" the Allison for your car. It's plenty stout as is it. It is put behind a lot tougher duty cycle vehicles than yours.
Team Owner
Joined: Jul 1999
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From: Orange Park Florida
I can understand the need of multi gears in a diesel hauling vechicle....the engine stays at 200-2500 rpm's all day long, and never varies...fine....that's the philosophy of a diesel....all torque down lo....
but in a gas engine vechicle, who needs a 5-6 speed tranny of ANY type.....with a TQ converter and 4 speed/overdrive, that's all anyone needs the rest is just added weight/complexity for no gain.....
unless i'ts a ricer with some wrung out 4 banger operating in the 6-7000 rpms range all the time, and the thing burns oil like a diesel after 20k miles running like that.....
but in a gas engine vechicle, who needs a 5-6 speed tranny of ANY type.....with a TQ converter and 4 speed/overdrive, that's all anyone needs the rest is just added weight/complexity for no gain.....
unless i'ts a ricer with some wrung out 4 banger operating in the 6-7000 rpms range all the time, and the thing burns oil like a diesel after 20k miles running like that.....
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Kansas City Area Coordinator
St. Jude Donor '08-'09-'10-'11,'13
As mentioned above Suncoast.
ATS has Allison 1000's ready to go and handle any HP/Torque requirements you could ever get out of your gas engine.
http://www.atsdiesel.com/
Have you ever seen an Allison 1000 in person? These things are huge.
I'm sure some major tranny tunnel modifications will be in order for your Vette.
As light as the Vette is in comparison to a 7000lb Sierra/Silverado, I'm willing to bet that a stock Allison will handle anything you throw at it.
I'm pushing out close to 500 HP and 875 lbs torque on my stock Allison with 90,000 miles on the clock. So far, its never limped.
ATS has Allison 1000's ready to go and handle any HP/Torque requirements you could ever get out of your gas engine.
http://www.atsdiesel.com/
Have you ever seen an Allison 1000 in person? These things are huge.
I'm sure some major tranny tunnel modifications will be in order for your Vette.
As light as the Vette is in comparison to a 7000lb Sierra/Silverado, I'm willing to bet that a stock Allison will handle anything you throw at it.
I'm pushing out close to 500 HP and 875 lbs torque on my stock Allison with 90,000 miles on the clock. So far, its never limped.
Last edited by C5Nate; May 30, 2007 at 07:31 AM.
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Kansas City Area Coordinator
St. Jude Donor '08-'09-'10-'11,'13
Team Owner
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From: Crossville TN
The intent of this thread was to consider the installation of an Allison tranny in a Corvette. If you don't like automatics and don't want to discuss this issue....find another thread. Your comments are of no particular use here.
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Joined: Apr 2007
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From: So Cal
Just reading about the Allison, I though it would be great to have an A6 that could handle a lot of power made me think the Allison would be ok. I have never seen one in person and that's where the problem comes. After talking to a few people, it turns out it's way bigger than a 6L80 and just won't fit in a vette. GM would have to beef up the 6L80/6L90 in order to have one that they could use. Doesn't seem out of the question since there are many aftermarket 4L80's that handle much more power than a new Z06 puts out.
Race Director
Joined: Jan 2003
Posts: 15,175
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From: State of Confusion
..... stuffing an Allison-6 into a C3 is interesting, and although I'd have no-intentions of doing-so, I'd enjoy hearing about this idea.
Racer
Joined: Mar 2005
Posts: 303
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From: southeast Idaho
I recently did a 4l80 install in my 72 std car. My 4l80 weighed right at 200 lbs dry and no converter. The 11.5 inch converter weighed 45 lbs and a stock diesel converter weighed 75 lbs. I used a Powertrain Control Solutions trans controller to run it. People are working on a controller for the 6l80e but last I heard there isnt one available yet. Give them a call and ask about the allison (804) 752-6025. I had a nice chat with Mark Bowler from Bowler Transmissions and he was telling me about a 4l80e they built to go behind a 2500 horsepower turboed chevy motor, it has lots of custom parts inside and was 13,000 bucks. Get that allison in there and lets see how it works,should be a cool project!!
