C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

T56 crossmember

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Old Mar 31, 2014 | 09:25 PM
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Default T56 crossmember

Hi all. I am replacing the 4 x 3 in my 84 C4 with a tremac T56. Looking for a gearbox crossmember. Does anyone know of anybody doing one to suit? Thanks.
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Old Mar 31, 2014 | 09:34 PM
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Most people fab up a bracket that allows the retention of the C-beam, to hold up the transmission.

http://forums.corvetteforum.com/1578080510-post13.html
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Old Mar 31, 2014 | 09:39 PM
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prostreetcustoms.net used to make adapters for them and t5s. Haven't been able to find them lately. Looks like he disappeared
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Old Mar 31, 2014 | 10:29 PM
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Originally Posted by Tom400CFI
Most people fab up a bracket that allows the retention of the C-beam, to hold up the transmission.

http://forums.corvetteforum.com/1578080510-post13.html
Ok thanks. Looking for cheaper alternative 1 st.
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Old Mar 31, 2014 | 10:32 PM
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Originally Posted by DHobbs
prostreetcustoms.net used to make adapters for them and t5s. Haven't been able to find them lately. Looks like he disappeared
Thanks. Thought someone there would have an over counter one.
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Old Mar 31, 2014 | 10:49 PM
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Originally Posted by Austvet
Ok thanks. Looking for cheaper alternative 1 st.
Cheaper than fabbing your own??

But you want an over the counter one?
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Old Mar 31, 2014 | 11:07 PM
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Originally Posted by Tom400CFI
Cheaper than fabbing your own??

But you want an over the counter one?
When the mech workshop is charging around $75 per hr than yes an over the counter one at about $300 landed here is still going to be cheaper than me paying for materials on top of an hourly rate to produce one.
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Old Apr 1, 2014 | 05:24 AM
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Originally Posted by Austvet
Ok thanks. Looking for cheaper alternative 1 st.
There's no less expensive alternative than the mentioned here:

Originally Posted by Tom400CFI
Most people fab up a bracket that allows the retention of the C-beam, to hold up the transmission.

http://forums.corvetteforum.com/1578080510-post13.html
There's two images in that thread and if both transmission are on the bench you just fabricate and modify the bracket to your preferences using similar thickness wood** product and glue. When you've a suitable "model" you have it duplicated in the appropriate material. Better than using the 4+ put your hands on an A4 extension. Your only other requirement is the C-beam you intend to use.

You'll be only limited by your own capabilities. When completed yours should fit, some "over the counter" didn't do very well.

I did a "Google" search and ended up with several images that could help.

** I've done similar projects but used plastic product because it could be threaded and use threaded fasteners.

Last edited by WVZR-1; Apr 1, 2014 at 07:27 AM.
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Old Apr 1, 2014 | 01:33 PM
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My .02 the ProStreet mount was reasonably cheap and it made my project move forward a little faster. If I had the time I could have made my own. To have something like this fabricated you need to be talking to a welder, rather than a shop mechanic (flat rate=$$$). Even a hobbyist welder could fab one up. Have the "C" beam on hand, as well as the T56 and a lot of pictures: your in business!
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Old Apr 2, 2014 | 01:18 AM
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Originally Posted by DanZ51
My .02 the ProStreet mount was reasonably cheap and it made my project move forward a little faster. If I had the time I could have made my own. To have something like this fabricated you need to be talking to a welder, rather than a shop mechanic (flat rate=$$$). Even a hobbyist welder could fab one up. Have the "C" beam on hand, as well as the T56 and a lot of pictures: your in business!
Ok. Looks like fabricating one is the only option. Thanks for your feedback though.
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