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Old 10-17-2014, 07:45 AM   #1
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T56 swap quick question

Okay so I have the whole setup for my 03 gt
Driveshaft, tranny, and crossmember.
Do I need anything else. I know I need clutch and shifter. What about the harness. I researched that I
Can just modify my own harness from previous tranny. Or instead just forget the tranny and replace the spring for reverse. Also Do I need the flywheel from a cobra? Anything y'all would like to
Add on would be great. Thanks guys
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Old 10-17-2014, 11:40 AM   #2
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Unless you have a Terminator engine, that transmission is going to SUCK *** behind your 2V engine...
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Old 10-17-2014, 11:41 AM   #3
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Damn. Not something I want to hear. How come ?
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Old 10-17-2014, 11:46 AM   #4
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Quote:
Originally Posted by straybullitt View Post
Unless you have a Terminator engine, that transmission is going to SUCK *** behind your 2V engine...


Why? I mean 6th gear will take sum power to pull up a hill but no one puts a t56 in there and leaves the motor stock for long and untill u can just run 5th untill u are making more power or up to speed and on flat surface


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Old 10-17-2014, 11:48 AM   #5
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Because first gear is a lot taller in the T56. You need to be at Terminator power levels to make it work.
I know a guy that bought a "bolt-on" GT with one already installed and his very first mod was to remove it and install a 3650.
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Old 10-17-2014, 11:52 AM   #6
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Well it seems like no one really has first hand experience. My car has full bolt ons and it's cammed out and headers and blah blah blah. My synchros went out in my 3650, so I just assume upgrade now cus eventually I will boost my gt.
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Old 10-17-2014, 11:53 AM   #7
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T56 swap quick question

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Originally Posted by straybullitt View Post
Because first gear is a lot taller in the T56. You need to be at Terminator power levels to make it work.

I know a guy that bought a "bolt-on" GT with one already installed and his very first mod was to remove it and install a 3650.

Dam that sux I've always wanted to go to the t56 but when i do ill have 370+ whp cuz of the blower im about to put on my car


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Old 10-17-2014, 12:02 PM   #8
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Once you guys supercharge, that will be a nice transmission!

Until then... Not so much.
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Old 10-17-2014, 12:15 PM   #9
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6th gear won't be an issue, if it's the one from the cobra then it'll be .62 which is the same as the 02+ TR3650's 5th gear. It's the 2.66 1st gear that is going to bog the hell out of the car unless it has the power low enough to get you out of it. (I.e. Twin screw)


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Old 10-17-2014, 12:15 PM   #10
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I drove a stock gt with a t56. And it's not bad at all. Felt like i had plenty of power left through out the gears. No need for 6 unless you are on the highway. But that's what influenced me to get it. Imma do it anyway just cus I experienced how it drives.
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Old 10-17-2014, 12:17 PM   #11
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On that note. I did feel little bogging compared to 3650 1st gear. But it's not that serious.
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Old 10-17-2014, 12:22 PM   #12
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There is another T56 that is actually a better choice for us. It's the 2.97 1st gear one, not as much bog and the overdrive is a .5 which really makes the rpms low on the highway. This is the one that came in GM cars like the Camaro and Corvette.


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Old 10-17-2014, 12:24 PM   #13
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Yeah. But I researched that those can't mount up with ford engines.
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Old 10-17-2014, 12:26 PM   #14
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But can u use a t56 that came in a trans am ws6 or the vette and change the bellhousing? I was under the impression that you couldnt because i was looking to do that because the gm t56s are cheaper then to try and find a terminator t56 trans


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Old 10-17-2014, 12:28 PM   #15
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T56 swap quick question

No, but you can get a T56 Magnum with the 26 spline input shaft rated past 700 pounds of torque for like $2800.

That's the route I'm going BTW.


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Old 10-17-2014, 12:50 PM   #16
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And to answer your original question, yes, your flywheel will work.
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Old 10-17-2014, 12:50 PM   #17
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^ thank you. I just need to get a cobra clutch and a shifter then.
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Old 10-17-2014, 12:52 PM   #18
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The cobras came with the 10 spline correct ?
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Old 10-17-2014, 12:52 PM   #19
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Quote:
Originally Posted by thyreaper View Post
But can u use a t56 that came in a trans am ws6 or the vette and change the bellhousing? I was under the impression that you couldnt because i was looking to do that because the gm t56s are cheaper then to try and find a terminator t56 trans
You won't be able to use the trans out of any Vette. They are rear mounted in those cars. F-body/Cobra/Viper trans are likely the most common sources of the T56.

Also, the vast majority of the T56 are the 2.66 first and .5 sixth. Which, with 4.10's should be fine. That should be around 40 MPH @ 6,000 rpm in first with factory size tires. Which I think is the same as what the car does stock on factory gearing.

The 2.97 first gear was originally used in the C5 Z06, not sure what other cars have it.

You could also look into a TR6060. They are basically in everything from the last 7 years that has a Tremec 6 spd. I believe these also have the same housing as the T56, but I think the shifter location may be different.
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Old 10-17-2014, 12:56 PM   #20
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The cobras came with the 10 spline correct ?
I believe the splines are different but that is something you'll have to Google.
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Old 10-17-2014, 01:04 PM   #21
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"F-body/Cobra/Viper trans are likely the most common sources of the T56"
So could i use one out of these cars and swap bellhousings? And i think the older vettes that used the 6 speed theres one vette that had it mounted behind the motor i believe it was a c4? The ones that first started using the 6 spd


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Old 10-17-2014, 01:21 PM   #22
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To my knowledge, all corvettes have rear mounted transmissions.

I'm not sure if just swapping the bell housing is all that's needed or if the shifters are located in different spots. I know that there are a few variations of the TR6060 that have the shifter located in slightly different locations and shifter relocation kits are available.

I'm just not sure if the Fbody/Cobra/Viper shifters are located in the same spot or not.
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Old 10-17-2014, 01:43 PM   #23
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You won't be able to use the trans out of any Vette. They are rear mounted in those cars. F-body/Cobra/Viper trans are likely the most common sources of the T56.



Also, the vast majority of the T56 are the 2.66 first and .5 sixth. Which, with 4.10's should be fine. That should be around 40 MPH @ 6,000 rpm in first with factory size tires. Which I think is the same as what the car does stock on factory gearing.



The 2.97 first gear was originally used in the C5 Z06, not sure what other cars have it.



You could also look into a TR6060. They are basically in everything from the last 7 years that has a Tremec 6 spd. I believe these also have the same housing as the T56, but I think the shifter location may be different.

I know that the 03 Corvette 50th anniversary has it. Cause that's what's in my parents corvette.


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Old 10-17-2014, 09:42 PM   #24
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To my knowledge, all corvettes have rear mounted transmissions.

I'm not sure if just swapping the bell housing is all that's needed or if the shifters are located in different spots. I know that there are a few variations of the TR6060 that have the shifter located in slightly different locations and shifter relocation kits are available.

I'm just not sure if the Fbody/Cobra/Viper shifters are located in the same spot or not.

I remember working on a older 6speed vette ( im talking older then the 2000's ) that had a reg trans and irs cuz i remember asking myself if it would work in my car i been up under it so i know it was not in the rear it was a legit 6spd trans but of course with a chevy bellhousing i wanna say it was a late 80s early 90's model (c4 corvette with the zf 6 speed trans)


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Old 10-17-2014, 09:57 PM   #25
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I remember working on a older 6speed vette ( im talking older then the 2000's ) that had a reg trans and irs cuz i remember asking myself if it would work in my car i been up under it so i know it was not in the rear it was a legit 6spd trans but of course with a chevy bellhousing i wanna say it was a late 80s early 90's model (c4 corvette with the zf 6 speed trans)
You are correct, it's the C5+ (1997+) that have the rear mounted transmissions.

I could have swore that a friend had a mid 90's C4 (LT1) that had a rear mounted trans.. perhaps I did more drinking than wrenching that night.
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Old 10-17-2014, 10:51 PM   #26
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Lol, but i wonder if they make a adapter or a bellhousing to mate it up with the modular motor


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Old 10-23-2014, 07:41 AM   #27
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T56 swap quick question

I currently have the spec stage 2 clutch and do need to change it, should I go with the used cobra clutch or should I get a new clutch disk for the spec
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