Ok guys, Ya'll gonna have to bail me out again..

[bgood]

I have scored a cherry '93 Z28 Camaro T56 six speed with 30,000 miles. Going to put in my 67 with 283.
My biggest challenge so far is that the 11" 26 spline clutch assembly is not supposed to bolt up to a older (pre 86) flywheel. Going to have to get a special one from Centerforce (+$275) I guess unless you guys know what kind of machining it requires to fit.
My engine is set up with a 153 tooth flex plate on my turbo 350 automatic. A local wrecking yard dude thought maybe the center bore might be the only difference since most manual trans. have 10 spline and the T56 has 26(Larger diameter than the 10 spline?).
Any clues as to what I'll need?
Thanks in advance, Bill

[1972C10]

I have a flywheel off a 84 L69 If you need any measurements Its the small diameter one like vettes use maybe its the same?

[bgood]

But I don't even have my hands on the new clutch yet...should be at Advance auto by the AM.

[1972C10]

Let me know Id be happy to measure it up I would kinda assume it would be the same but No telling.

[dwaite72lnghrn]

The '93 has a 1 piece rear seal which makes changing the flex plate a must. Do you know what diameter your torque converter is. The new flex plates is punched for 2 sizes if your torque conveter matches it should be good. Go to the GM counter and ask for a flex plate to go from 1 pc rear seal engine to TH350, I think it would be a 12 3/4" bolt pattern(measure don't trust me). the last time I was in they said about $90 bucks. Unless you go for the camaro race flex plate for $260.

[bgood]

I read somewhere that the 153 tooth is 12.75" dia. But forgive my ignorance, I'm doing away with the turbo 350 flex plate and installing a flywheel in its place...Is there some way to convert my flew plate to a flywheel. I ask this because I pulled up some "flywheel" items on Summit Racing website and the pics revealed an auto transmission flex plate.
Am I missing something here?

[dwaite72lnghrn]

Sorry misunderstood. What engine/trans are you trying to end up with?

[bgood]

To end up with a '67 283 mated to a '93 T56 six speed...eventually .

Thanks for the help, there's not much info out there unless you spend BIG bucks for a aftermarket Tremec\Borg Warner or Richmond.. I'm about $1000 in with just the tranny and clutch& pressure plate.

[Dave Reed]

Originally Posted by bgood

To end up with a '67 283 mated to a '93 T56 six speed...eventually .

Thanks for the help, there's not much info out there unless you spend BIG bucks for a aftermarket Tremec\Borg Warner or Richmond.. I'm about $1000 in with just the tranny and clutch& pressure plate.

I am not an expert, but isn't the T56 a Tremec/Borg Warner deal. I do however have someone who can help you. Forte's Parts Connection in Mass. I think it is Burlington, Ma. Mike Forte is the owner and the premier dealer for Tremec conversions. He does these all day long. Tell Mike, "Dave Reed says Hi" He will help you.

[bgood]

I've been reserchin' this deal for a couple of weeks before buying into the tranny and I don't know yet but there may be a huge difference in the dimensions of pre-1986 clutch pressure plates and my newfound '93 Borg.
By comparing dimensions of the two the T56 has a bellhousing that is at least 4" shorter (lengthwise) than the bellhousings on Muncies and Saginaws, so I'm thinking the pressure plate and throwout bearing have got tbe of a slimmer design. Hope to know more tomorrow...maybe I'll get my favorite counterman to compare the two sets. Additionally the length of the trans minus the bell is quite long and will require me to shorten my driveshaft about 3".

Discreet, yeah the T56 is a Borg Warner but the one's at TTC, Sallee, and Keisler have been modified and adapted to the older bells and are $1800-3000. I may have to go crawlin to your friend Mike, but they may not want to help me alter mine since I think they sell complete converted units as Sallee and Keisler. Thanks for the tip and contact.

Brainchild, all small block flywheels after 1986 are counterweighted to externally balance the engine's cranks shaft. I have an older brother who's been in the dirt track racing circles for years and he says the 400 cube engines have always been externally balanced.

72 C10, I'd be really interested in how your bud's swap went, maybe the new clutch assembly will mate to a pre 1986 flywheel after all...I can't remeber where I read that there was a problem... seems like i been surfing in circles lately !

[Brainchild]

If the 26 spline disc is 11" can you just run it with an old style 11"pressure plate and flywheel.11" is 11" OD I would think.I really don't see why it wouldn't work.As long as the pilot shaft diameter,and input shaft length is the same.I guess the shaft length isn't going to matter either if you have the late model bellhousing.

[68C15]

brainchild is on the right track. I do know for a fact that the flywheels are different between the one-piece & 2 piece rear main cranks. the diff is the bolt pattern. but, I believe the bolt pattern on the flywheel for the pressure plates are the same. I can look at an old style wheel tomorrow & measure it just to make sure.

[1972C10]

You know after thinking about it a second ,, Friend of mine has a 95 GMC with a T56 He was running a later model one peice seal engine .. but he blew it up and built a carbed old style block ill ask what kinda flywheel he is using.

[Brainchild]

I don't think there is a difference in the 1 or 2 piece sel units that will keep them form interchaning.I wouldn't think so.

[1972C10]

Ill ask him tommorow and post the answer.

[73stepside]

the flexplates and flywheels are different from one piece seal to 2 piece seal. the one piece seal flexplate/flywheels have a small weight attached to them similar to the 400 small externally balanced stuff but is not externally balanced. other than that they are identical. word to the wise though...don't get externally balamced flexplates/flywheels for 1 piece seal motors or you will pick up serious vibrations. the weight on the 1 piece seal units make up for what was taken off the crank

[Brainchild]

Originally Posted by 73stepside

the flexplates and flywheels are different from one piece seal to 2 piece seal. the one piece seal flexplate/flywheels have a small weight attached to them similar to the 400 small externally balanced stuff but is not externally balanced. other than that they are identical. word to the wise though...don't get externally balamced flexplates/flywheels for 1 piece seal motors or you will pick up serious vibrations. the weight on the 1 piece seal units make up for what was taken off the crank

There is some usful info.Better commint that to memory,thanks

[Blue Beard]

Seems like this comes up alot, someone should put and article in the FAQ section that would covers the manual and automatic installation process.

[1972C10]

I talked to him today and he said the clutch bolted right up to an old flywheel ? He is running a T56 out of a LS1 car so he had to get a custom made bell housing You lucked out getting a 93 It will be perfect His had too long of an input shaft on it aparently the LS engines have deeper pilot holes.

[gmc67swb]

Why don't you check into putting the whole thing into your truck? Ya know, motor and all. Then all you have to worry about is getting a harness and mounting a clutch master cylinder...I read somwhere that '93 6spd cars were kinda rare....They're supposed to have a real low first gear, like 3.27 compared to the later cars with 2.66....

Just for grins, here's my motor. It has a 1 piece rear seal. I had to get a specific flywheel. I know it's going the opposite direction, but in case anyone wanted to see the difference.

[bgood]

Thanks 72 that's great news. Picked up my new clutch today and boy is it a curious affair, it's a "pull" type version. I was wondering how in the heck this thing was going to work
One of these days when I'm able to upgrade this piece'o junk computer I'll post some picks of this deal, my computer sucks basiclly, it has windows 98 and the"Upgrade" and will not recognize any periphial devices that i might want to add. I even reserched Microsoft's website and they are awar of the prob and even their patches don't work, but thats another can of worms

Anyhow, this transmission uses a pull type clutch and its weird lookin...the fingers on the pressure plate are bowed inwards towards the flywheel and the throwout bearing is made into the pressure plate, allready i don't like it, if the bearing goes bad you gotta toss the whole deal .

GMC Having to part with my 283 is not doable at this time, wife keeps saying something about lack of funding . My engine had just been built when I got the truck and so far it has run great...although a little anemic. As much as I'd like a 350 right now it'd prolly be dangerous for me to have that much power until I get around to upgrading the suspension and BRAKES.
I read somewhere that one guy doesn't even use his sixth gear unless he's on a long, level stretch of interstate

thanks again guys, you've been a great help.
Bill

[gmc67swb]

I thought the "pull type" was for the hydraulic set up that came in the camaro. I was thinking you were going to retain the original linkage style clutch. I may be wrong but I thought the bell housing and tranny were integrated, even on the '93.

[bgood]

is removeable... it's only about 8" deep hence the need for the dished in pressure plate and internal bearing. Incidently I was thinking of morphing the linkage and avoiding the hyd setup but the thing is so weird...it has a slave cylinder that mounts and pushes from the rear thus actually Pushing the clutch lever FORWARD causing the yoke end to go towards the REAR and putting tension on the inverted fingers on the funky pressure plate.
I know this is probably all clear as mud unless you've worked on one of these before. Basically you just take everything you've ever known about clutches and toss it out the window .

Personally I think the egineers were all on Crack on this one... I even read one guy says to drill out the insides of the hyd fittings to allow for more fluid flow or you could get slow reaction of the clutch as you release the pedal. Sheesh talk about a brain f--t!

[1972C10]

ALSO .. I dont know if its applicable here but when i put that T5 in my 68 I could not run a large DIA. Flywheel the trans case has a spot where the starter nose cone goes in and would only work with the correct starter I tryed using a 153 tooth auto starter.

If you end up needing a flywheel let me know Ive got one of them Vette type flywheels.


Oh and my friend tracy ran 4.56 Gears in his 95 and he rarely used sixth .