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Anyone ever adapt a Corvette transaxle to a 944/928?

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Old 11-12-2008, 06:32 PM
  #16  
FRporscheman
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Quaifes are cheap compared to the cost of fabrication.

928 automatics also have a separate tranny and diff, but the manuals are true transaxles.
Old 11-12-2008, 07:08 PM
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azbanks
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Z06 units are one piece but the trans is in front of the diff where our cars have the diff in front of the trans. You would need to reshape the metal under the back seat to fit around the trans. Then fab up trans mounts, etc.
Old 11-12-2008, 07:47 PM
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Whisper
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Originally Posted by FRporscheman
Quaifes are cheap compared to the cost of fabrication.

928 automatics also have a separate tranny and diff, but the manuals are true transaxles.
Hmmm. Help me understand this here, I'm a novice.

So a "transaxle" is the gearbox, differential, and drive axle as a single unit. Which is the weak link on the 944? Is it sufficient to fit a high-quality LSD, or are other parts prone to failure under the strain of a more powerful engine?
Old 11-12-2008, 08:52 PM
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944obscene
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I'd be worried about the trans not being able to take the power, but not before the axles. But, what kind of power would you need to make, to necessitate a corvette or built trans?
Old 02-22-2009, 11:09 PM
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Dougs951
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Is there a strength difference in the 928 transaxle? If so has anyone swaped one of those into a 944?
Old 02-22-2009, 11:38 PM
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Rock
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I dont get it. Unless youre downright abusing the hell out of your transmission, then there should be no need for something like this.

A 951 LSD is for the most part pretty damn indestrucable for the power that 95% of 951s even put out.

Why try and reinvent the wheel, when theres nothing wrong with it at all?
Old 02-22-2009, 11:42 PM
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knfeparty
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How much does a newer 'vette transaxle cost, anyways? Truly wouldn't you be adapting the 944 to the transaxle, price-wise?
Old 02-23-2009, 12:32 AM
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V2Rocket
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Originally Posted by 944obscene
I'd be worried about the trans not being able to take the power, but not before the axles. But, what kind of power would you need to make, to necessitate a corvette or built trans?
corvettes up until recently put out 500hp max...(you will not find a ZR1 tranny for some time)...considering that one of our users here has gotten over 600HP at the wheels on his 951 and is still using the stock turbo gearbox, i would say its pretty tough.
Old 02-23-2009, 12:54 AM
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MPD47
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Originally Posted by V2Rocket_aka944
corvettes up until recently put out 500hp max...(you will not find a ZR1 tranny for some time)...considering that one of our users here has gotten over 600HP at the wheels on his 951 and is still using the stock turbo gearbox, i would say its pretty tough.
Guess my blown gearbox was a fluke? Or Tifo's on his NA? Or Dmoffitt's on his turbo? Or the variety of other ones?

I suppose those 1000hp twin turbo Vettes, or the 1200hp camaro running T56's local to me are mythical as well.....

Yes, it's doable, Steve Rea has done it to his car which runs enduro's (NASA events I believe?) west coast:





And what you asked for:

You can see the tube work if you look closely used to mount the C5 rear crossmember and suspension.

Last edited by MPD47; 02-23-2009 at 03:05 AM.
Old 02-23-2009, 01:39 AM
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Originally Posted by V2Rocket_aka944
considering that one of our users here has gotten over 600HP at the wheels on his 951 and is still using the stock turbo gearbox, i would say its pretty tough.
Spencer, Special Tool who has that 951 is 'not' tracking that car every weekend, or running it in any race series. If he did make that type of 'sustained' RWHP, it would blow easily, I guarantee it. And vette trannys happen to be built like brick houses too. Practically bullet proof in IMSA racing. See the link below. I have seen these cars race and they amazingly fast. 640TQ.



http://www.corvetteracing.com/cars/c...ne_specs.shtml
Old 02-23-2009, 01:43 AM
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UncleMaz
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Originally Posted by MPD47
Guess my blown gearbox was a fluke? Or Tifo's on his NA? Or Dmoffitt's on his turbo? Or the variety of other ones?

I suppose neither of those 1000hp twin turbo Vettes, or the 1200hp camaro running T56's local to me are mythical as well.....

Yes, it's doable, Steve Rea has done it to his car which runs enduro's (NASA events I believe?) west coast:





And what you asked for:

You can see the tube work if you look closely used to mount the C5 rear crossmember and suspension.
Thanks for posting MPD. From the looks of the profile of the car, the rear quarter body work looks very Vette like too.
Old 02-23-2009, 01:48 AM
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MPD47
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It's the 924 Lemans Boxed 1/4's, same stuff as the BOSS car from the 951 ad campaign
Old 02-23-2009, 03:40 AM
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Man, Steven Rea's car looks nothing like how it looked when I sold it to him... Hard to imaging that the car used to be all white.
Old 02-23-2009, 11:23 AM
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Yes, some people break the 944NA transaxle but you can install 944S2 transaxles as stronger replacements. Adding an LSD is not cheap but a different transaxle would be a huge, expensive project that would cost 10x more. Besides the cost of the new transaxle and perhaps LSD, and the basic fabrication you have to deal with:

custom torque tube
custom axles
fuel cell
speedo drive

-Joel.
Old 02-23-2009, 12:21 PM
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V2Rocket
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i would rather replace a tranny 10 times than try to fabricate mountings for an entirely different unit and id still save money.


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