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Thinking c6z trans and diff.

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Old Jun 12, 2018 | 12:28 AM
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Default Thinking c6z trans and diff.

I'm thinking of going c6z trans diff cradle into my 01z before I start my boost life with this car. Went thru 27 spline & 30 spline and 3 diffs in my old z.
I have my full built m12 30spline.
Should I keep it and get new tail housing and match to c6z diff
Or just go straight to full 08+ z06 trans and diff.

What do you guys think.
Sell built 30spline t56/30spline diff and go with newer stronger better setup or keep and mod my trans to fit new diff.

Thanks as always Jason



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Old Jun 12, 2018 | 12:51 AM
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how much power are you trying to make?... you might be fine with the t56 but if you are going for big hp or if you have the funds for it I'd go for the full tr6060 conversion, plus if you sell your current setup you can recoup a good chunk of what the swap will cost... it's worth good money working but not so much if it's broken
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Old Jun 12, 2018 | 12:57 AM
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Originally Posted by neutron82
how much power are you trying to make?... you might be fine with the t56 but if you are going for big hp or if you have the funds for it I'd go for the full tr6060 conversion, plus if you sell your current setup you can recoup a good chunk of what the swap will cost... it's worth good money working but not so much if it's broken
600 + - when in first get going but Who knows after that.
Yea i think this 30spline trans and diff is worth some $$ plus I'll have the cage and pafdt mount to sell also which sell pretty fast on the used market plus I have some extra parts lying around
Sent a msg to Bret earlier to see exactly what I need for the swap and and budget as I can get.
Thanks again for your response, Bret talked about your car when we were going over my plans for this new car.
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Old Jun 12, 2018 | 01:16 AM
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oh, is your t56 from a base or z06?... the c5 t56 z06 gearing is also not as good for boost, the base c5 t56 has the same gearing as the c6z which is better and of course the zr1 even more so but are usually more expensive to obtain... c6 grand sports also have the same gearing as the c5z... just throwing that out there for when you start looking at transmissions, but Bret will be able to tell you all you need to know
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Old Jun 12, 2018 | 01:27 AM
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Originally Posted by neutron82
oh, is your t56 from a base or z06?... the c5 t56 z06 gearing is also not as good for boost, the base c5 t56 has the same gearing as the c6z which is better and of course the zr1 even more so but are usually more expensive to obtain... c6 grand sports also have the same gearing as the c5z... just throwing that out there for when you start looking at transmissions, but Bret will be able to tell you all you need to know
03 m12 z06 trans had 27k miles and i had new syncros then the upgraded keys and pads and a 30spline shaft, has about 3k miles and no strip passes I'm kinda scared. The diff has 40k miles from 02z with c6z shafts and clutches and 30spline pinion no passes.
I also have a c6z pinion support and bearings, 2 extra sets of 342s- 1 27 spline stock and a 30spline pinion both matching
Also about of spare diff parts
I also will sell the dte/Hoosier cage/brace and a pafdt mount.
Basicly everything I wanted or a c5 upgrade.

Last edited by jdwtx85; Jun 12, 2018 at 01:28 AM.
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Old Jun 12, 2018 | 09:45 AM
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I have a 5000 mile C6 t56 for sale if you are looking for one.
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Old Jun 12, 2018 | 10:45 AM
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Originally Posted by TorqueWinsRaces
I have a 5000 mile C6 t56 for sale if you are looking for one.
No thanks
I've got a built t56
Want z06 tt6060
Thanks though
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Old Jun 13, 2018 | 10:51 AM
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Note sure if you have taken a look at these or how it compares to what you have now. The C5 unit is rated at 850 ft-lbs

http://tcase.rsgear.com/products/tra...tranzilla.aspx

Combine that with say a aFe/pfadt or Hoosier rear trany mount brace and some fluid coolers and that should help.
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Old Jun 15, 2018 | 03:33 PM
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I just had this swap finished. Put a C6Z06 main shaft in my T56 and had it rebuilt to RPM stage 4 specs. Used a C6Z rear diff also built, an ECS brace and used a dual mount rear k member so I didnt have to use the offset mounts.
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Old Jun 17, 2018 | 06:43 AM
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Originally Posted by Millenium Z06
I just had this swap finished. Put a C6Z06 main shaft in my T56 and had it rebuilt to RPM stage 4 specs. Used a C6Z rear diff also built, an ECS brace and used a dual mount rear k member so I didnt have to use the offset mounts.

Which dual mount k member did you use? I really would prefer not to spend that kinda $ on mounts! Thanks. Or is that only for the rear and not a tt6060 swap?
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Old Jun 17, 2018 | 09:19 AM
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The only thing I cannot wrap my head around is modifying the over axle pipes. I have not seen or heard a set exact what people do.
I saw in brets sticky that you have to modify and that's what they say in fb also. I just wish I could find out exact.
Oh yea happy father's day to all yall!
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Old Jun 17, 2018 | 11:54 AM
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you have to cut a 3" section out of the midpipe, cut the over axle pipes at the top, and weld those 3" sections back into the over axle pipes... so basically you are shortening the midpipe and lengthening the over axle pipes so they can clear the diff case
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Old Jun 17, 2018 | 12:18 PM
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Originally Posted by jdwtx85
The only thing I cannot wrap my head around is modifying the over axle pipes. I have not seen or heard a set exact what people do.
I saw in brets sticky that you have to modify and that's what they say in fb also. I just wish I could find out exact.
Oh yea happy father's day to all yall!


Mine had to be extended at the top of the over the axle hoop and at the mid-pipe connection








Last edited by Millenium Z06; Jun 17, 2018 at 12:30 PM.
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Old Jun 17, 2018 | 12:21 PM
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Originally Posted by nyciti
Which dual mount k member did you use? I really would prefer not to spend that kinda $ on mounts! Thanks. Or is that only for the rear and not a tt6060 swap?
I'd have to check on the K Member but it's a dual differential bolt pattern k member.

The 6060 doesn't matter, it's the C6/Z differential that necessitates the K member swap.
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Old Jun 17, 2018 | 12:30 PM
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Originally Posted by neutron82
you have to cut a 3" section out of the midpipe, cut the over axle pipes at the top, and weld those 3" sections back into the over axle pipes... so basically you are shortening the midpipe and lengthening the over axle pipes so they can clear the diff case
Ah ok that sounds simple.
Best solid answer I've got l.
Thanks neutron
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Old Jun 17, 2018 | 12:39 PM
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Originally Posted by nyciti
Which dual mount k member did you use? I really would prefer not to spend that kinda $ on mounts! Thanks. Or is that only for the rear and not a tt6060 swap?
Here's a pic, I'll see if I can get you a part number




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Old Jun 17, 2018 | 12:58 PM
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Originally Posted by nyciti
Which dual mount k member did you use? I really would prefer not to spend that kinda $ on mounts! Thanks. Or is that only for the rear and not a tt6060 swap?
Rear Subframe Cradle Crossmember 25795639 Corvette C6 ZR1 Z06 427 2009-13


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