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Old 04-24-2006, 09:02 PM   #1
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Default does a lt1 t56 bellhousing bolt to a BBC

it does right?
Looking to swap out my 700r4 in my BB rs-z for a t56.
Any links to some good info on this?
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Old 04-24-2006, 09:05 PM   #2
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AND what about the flywheel.
do I need a custom one?
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Old 04-25-2006, 03:32 PM   #3
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yes it will swap but im not 100% sure about the flywheel i think you will need a different one.

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Old 04-25-2006, 03:54 PM   #4
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you should use an LT1 flywheel and clutch assembly for it. I haven't seen any other way for it yet
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Old 04-25-2006, 04:33 PM   #5
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Well i wouldn't use a LT1 flywheel if your BBC was externally ballanced being the LT1's are internal.I looked into this awhile back cause i was going to put a t-56 in my 71 camaro i had at the time.You can use the pull stlye clutch with a special flywheel and t-56 hydraulics.i think Hays made one for it ill have to dig up an old article.You can do a google search and probably find more info
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Old 04-25-2006, 06:31 PM   #6
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I have a 427, they are internaly ballanced. the 454's are external.
Thanks for the good info.
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Old 04-25-2006, 08:07 PM   #7
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I have a flywheel that will bolt right onto your 454, and allow the use of a LT1 clutch and trans. I bought it from McLeod, planning to use it in my El Camino, and changed my mind. Let me know if you are interested. It is brand new, never installed, and I think I paid something like $350 for it. I doubt I will be using it anytime soon, considering I already sold the trans. Make me an offer.
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Old 04-25-2006, 09:28 PM   #8
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Would be easier to use a LS1 trans better clutch too!
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Old 04-25-2006, 10:07 PM   #9
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I think the ls1 trans is stronger too, I have one behind my twin turbo SS.
I dont think the bellhousing bolts up to the BBC like the LT1 one does.
I would need an adapter. If I do that I should just find a viper t56.

Sandman120 - Its a 427 not a 454 - the 454 flywheel has waights on it, I dont think It would work for me, but I'll find out.

Thanks again.....
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Old 04-25-2006, 10:14 PM   #10
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Here is the rig in question.
BBRSZ
Attached Thumbnails
does a lt1 t56 bellhousing bolt to a BBC-bbrszsideweb.jpg   does a lt1 t56 bellhousing bolt to a BBC-bbrszmotorwb.jpg   does a lt1 t56 bellhousing bolt to a BBC-blackcherrybbrszweb.jpg  
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Old 04-26-2006, 12:24 AM   #11
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Quote:
Originally Posted by TTSSZ
I think the ls1 trans is stronger too, I have one behind my twin turbo SS.
I dont think the bellhousing bolts up to the BBC like the LT1 one does.
I would need an adapter. If I do that I should just find a viper t56.

Sandman120 - Its a 427 not a 454 - the 454 flywheel has waights on it, I dont think It would work for me, but I'll find out.

Thanks again.....
Stew
Really? I will have to take the one we put together apart so it can work
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Old 04-26-2006, 12:56 AM   #12
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Ive got the Flywheel off my 454 sittn at my shop, I dont remember the weights on it but il chech in the mornin.

-john
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Old 04-26-2006, 06:48 AM   #13
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Talk to me bro
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Old 04-26-2006, 09:10 AM   #14
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If you have a 1 pc rear main the lt1 should work. I had a 2pc rear main on my 383 so i had to get a different one. If you have a 2pc, you have a couple different options. Mine is centerforce, but i think fidanza makes one also. The centerforce one i have is counterbalanced...pn 183-700173 through jegs. What you will need to do is use your dampner (or an identical one but yours would be the best) and an identical crank and this flywheel and take them to a machine shop and have them balance match it to your dampner, identical crank, and your old flexplate. Should work fine then.
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Old 04-26-2006, 10:48 AM   #15
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Guys you may want ot check your sources because I've always read the LT1 tranny was stronger. I've always heard peopl talking abouyt how funnyi ti was that GM would put the stronger tranny behind the weaker engine.
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Old 04-26-2006, 11:58 AM   #16
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Quote:
Originally Posted by TAEnvy
Guys you may want ot check your sources because I've always read the LT1 tranny was stronger. I've always heard peopl talking abouyt how funnyi ti was that GM would put the stronger tranny behind the weaker engine.

Again slightly mis-leading. yes it seems the LS1 tTransmission gets hurt more pften...then again the LS1 makes alot more HP then the LT1. Inside they are pretty much the same save for a early 93 Trans.

There are many options. It looks like you want to spend the cash so get ahold oh McLeod or D&D and order a complete kit ready to drop in. After it is all said and done it will save you money

And yes I do work on T56 transmissions on a daily basis
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Old 04-28-2006, 12:42 PM   #17
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The bellhousing from the lt1 (or ls1) engines will bolt up . You need a special fly wheel for either, and mcloed can make them. I have a t56 in my 454ss tow vehicle, that made 350rwhp/ 490rwtq, and it is held up fine for years now. BTW, LT1/LS1 Fbody transmissions are internally IDENTICAL. The input portion of 4th gear gear is a litttle longer to accomidate the slave on a LS trans, but thats the only difference.
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Old 04-28-2006, 01:09 PM   #18
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Quote:
Originally Posted by TwoFast4Lv
And yes I do work on T56 transmissions on a daily basis
I thought you just worked on those silly slushboxes?

I'd do the McLeod bellhousing / LS1 transmission, personally. The McLeod bellhousing has both LS1 and SBC bolt patterns on the block flange. I'm assuming the SBC bolt pattern for the bellhousing is the same as the BBC. From there, I'd talk to McLeod about how to set up the clutch.

Either that, or like Ellis said, get a true retrofit trans. It will indeed likely be cheaper than piecing something together.
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Old 04-28-2006, 08:17 PM   #19
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Thanks for the info.
I was also looking at the tko's - 500 and 600.
There is kits for those that are almost bolt in.

We'll see what happens when the gov-ment sends me my cheeze.

To do a real good 700r4 is 2g's or better, just to make it last a few years,
after seeing the beating my SS's t56 has taken, I think it would last a long time behind a 427. If I can keep the conversion in the 2g range I would be very happy. So 2g's x 20% (it always costs more then I think) factor = what? - 2400 or so.
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Old 04-29-2006, 12:42 PM   #20
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Quote:
Originally Posted by Camaroholic
I thought you just worked on those silly slushboxes?

I'd do the McLeod bellhousing / LS1 transmission, personally. The McLeod bellhousing has both LS1 and SBC bolt patterns on the block flange. I'm assuming the SBC bolt pattern for the bellhousing is the same as the BBC. From there, I'd talk to McLeod about how to set up the clutch.

Either that, or like Ellis said, get a true retrofit trans. It will indeed likely be cheaper than piecing something together.

HEHE!

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On topic.

Either one done right could easily cost more then $2k. Hell I have about $2k in my tans and my car came with it!
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Old 04-29-2006, 12:42 PM
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