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I have a stupid question, I heard that you can use the stock 5 speed transmission from the Solstice with an LS2 motor. If this is true could you use the 6 speed transmission from the corvette on the 2.4L Ecotec Motor??? Lets get some feedback on this....Thanks!
 

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Maybe, maybe not. It depends on the transmission length and possibly the bellhousing amongst other things like shifter placement etc. I'm not knowledgable enough to know the specifics of what would be involved in a 6 speed mod. (I'd get the richmond 6-speed anyway, one less overdrive gear)
 

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Well, a different bellhousing would be needed to bolt the 5speed to the LS2. I would assume that it would be the same the other way around as well. As far as shifter location and things like that, While I don't have measurements I have (kinda) checked it out, and I don't think there would be a problem..

jay
 

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You can get a Richmond 6 speed in the range of $2,700. I put one in my 65 GTO.
 

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The solstice roadster concept had a six speed, does anyone know anything about that trans? I'm fairly certain that was a fully working concept yeah? If we can get that to work then maybe...
 

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The concept had a different Ecotec motor, I believe it was the 2.0L.
 

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I would really be concerned about the transmisson length. While I was in college (many years ago) I read a for sale ad for a Bug Eye Sprite that the owner had dropped in a Chevy 283. The ad went on to talk about performance and ended with the comment that the car had a 3-speed transmission because a 4-speed wouldn't fit. I'd be concerned about the same possible problem with the Solstice. By the way, I'll bet that Sprite could really run fast in a straight line. :lol:
 

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Dude, its called a custom driveshaft! length is not an issue. The only limiting factor is where the shifter would poke through and even that can be fixed with a relocation kit of some kind. When customizing keep in mind that there is Always a way!

Btw, I found that the six speed in the concept was a Borg Warner from a C5 corvette. If GM can do it so can I! Now I just need some parts ...and a car!
 

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The Corvette transmission is a rear mount transmission. It won't fit in the Kappa all that well (if at all).

Not sure why you would want it with the 2.4L anyway. It is really just a 5 speed transmission with a second overdrive gear to help it achieve decent highway fuel mileage and avoid a gas guzzler tax. It doesn't have 6 speeds for performance reasons.

Besides, I don't think this car really needs a true 6 speed with the stock engine. It has a pretty flat power curve as it is, and I would think that adding an extra shift would cost you more time to shift then it would gain you in keeping the revs up a little more.
 

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Info

Keisler engineering has an adaptor plate as well as a bellhousing to bolt up a tremec or many other GM transmissions. I have already looked into this as i may be building a solstice to run in the nhra/nopi in sport RWD. Google ecotec tremec and youll see the webpage. now drop in a fully built turbo engine from the build book and the trans and go hunting :devil:
 

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Well since I'm not keeping the stock engine it doesn't matter much! and yes you CAN mount a vette trans to a bellhousing, it doesnt matter much to it! You just have to make an adapter and an output housing ...that or use an early C4 trans, or something else... I think I'm going to end up using a highly modified LS1 in mine, but I'll decide that when I get there.
 

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Bob Lutz has been quoted as saying they looked at 6 speeds in the solstice and found them to be no quicker 0-60 or in the quarter mile than the 5 speed.

The main reason to want a 6 speed, (with the base engine, anyway) would be for track racing, where you could use the closer ratios.

I also read in an article in the news section, that Pontiac didn't have the time or want to spend the money to use non off-the-shelf gears, and they realize that the drop from 2nd to 3rd is a little too big.

I'd bet that the 07's have this issue addressed, and maybe even an optional 6 speed.
 

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Cadillac uses an Aisin AY6 6 speed in the V6 CTS. Its capable of handling 255 lb-ft of torque, higher than the AR-5's 225 lb-ft rating. The bell housing is different as is the shape of the gear box and the shift linkage is in a completely different location. By the look of it, no way it would easily transplant into the Solstice.

OTOH, it may be possible to transplant a couple of its cogs to improve the ratios in the AR-5, 3rd, 4th and 5th gears in particular. IMO, all three of these gears are too tall in the Solstice. If the gears could be transplanted, the ratios would change from:

3rd: 1.37 to 1.53
4th: 1.00 to 1.15
5th: 0.73 to 0.79 (6th gear in the AY6)

This would give the Solstice a closer ratio lower four gears with a useable 5th gear overdirve. The distance in ratio from 4th to 5th would increase, but that's a bit of a small price to pay if your interest is in spirited backroad driving or track day fun. In those instances, you won't visit that very tall 5th gear much in the first place.
 

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Six speeds are really about manufacturers getting better gas mileage for goverment testing.

Five speeds are more than fine.

I almost never use 6th gear in my car. Its really just a cruising gas mileage gear. Fifth is also an overdrive.

I would imagine the F body ls1 version of the Vette tranny would work great.

Probably inexpensive to buy from a wreckage yard?

Same for the LS1 motor.

Plenty of guys selling ls6 motors with around 10K miles for about 4 grand because they want to go to a forged 402 LS2 and get about 505 rear wheel hp.

LS1's are probably half that cost....

Starting to get interesting right?
 

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TOY4TWO said:
Is the Turbo that is being announced in a few weeks have a 6 speed?
Unknown at this point. GM has not announced the transmission. The original showcar has a 6 speed with an F/I engine, but GM is also likely to stick with a parts bin transmission which could mean they will continue with a 5 speed.
 

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JBsZ06 said:
Six speeds are really about manufacturers getting better gas mileage for goverment testing.

Five speeds are more than fine.

I almost never use 6th gear in my car. Its really just a cruising gas mileage gear. Fifth is also an overdrive.

I would imagine the F body ls1 version of the Vette tranny would work great.
Getting the dual overdrive six speed on this car would be ridiculous unless you put on some insane rear gears like 4.55:1...or higher.
 
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