What do I need for the swap? T56 About to purchase...
Thread Starter
Joined: Nov 2012
Posts: 672
Likes: 16
From: Michigan
Car: 1988 IROC-Z/G92
Engine: 5.0
Transmission: T-5
Axle/Gears: BW 3.45 Eaton Truetrac
What do I need for the swap? T56 About to purchase...
Hello, I'm about to purchase a T56
The ad is as stated:
T56 built to run behind a 454
Ls1 input shaft.
Ls1 Bell
Pilot bushing for 454
Sold the adapter plate
Run your big block with 6 gears
What else would I need if I were to buy this?
Thanks!
The ad is as stated:
T56 built to run behind a 454
Ls1 input shaft.
Ls1 Bell
Pilot bushing for 454
Sold the adapter plate
Run your big block with 6 gears
What else would I need if I were to buy this?
Thanks!
Joined: Sep 2005
Posts: 27,867
Likes: 2,429
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What do I need for the swap? T56 About to purchase...
A brief search of the FAQ forum yielded this tidbit:
https://www.thirdgen.org/forums/faq-...questions.html
An even briefer search of the "sticky" posts at the top of the page provided this:
https://www.thirdgen.org/forums/tran...ap-thread.html
Read, digest, understand, compare, read understand, read, read, read, understand, read, read, think. Read, understand, read, read. When you've done all those things, in that exact order, and maybe a few more of the same thing thrown in here and there, come back and ask any NEW question(s) you might be able to think up that aren't already answered in those posts, as well as the myriad others with "T-56" in the title (I'm skeptical), which contain EVERYTHING you could possibly want to know, except maybe whether a T-56 looks good swapped into a car that's your color.
Keep in mind of course, that a 454 is IDENTICAL to a 350 or other small block in this matter, except for the flywheel balance, and any year-model-related differences such as 1-pc vs 2-pc RMS.
https://www.thirdgen.org/forums/faq-...questions.html
An even briefer search of the "sticky" posts at the top of the page provided this:
https://www.thirdgen.org/forums/tran...ap-thread.html
Read, digest, understand, compare, read understand, read, read, read, understand, read, read, think. Read, understand, read, read. When you've done all those things, in that exact order, and maybe a few more of the same thing thrown in here and there, come back and ask any NEW question(s) you might be able to think up that aren't already answered in those posts, as well as the myriad others with "T-56" in the title (I'm skeptical), which contain EVERYTHING you could possibly want to know, except maybe whether a T-56 looks good swapped into a car that's your color.
Keep in mind of course, that a 454 is IDENTICAL to a 350 or other small block in this matter, except for the flywheel balance, and any year-model-related differences such as 1-pc vs 2-pc RMS.
Joined: Jul 2000
Posts: 6,519
Likes: 91
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: What do I need for the swap? T56 About to purchase...
A 2.66 first / 0.50 sixth T56 is not what you want with an LB9 / 3.42 or 3.23 rear.
Run your T5 until you're ready to make changes that match.
Run your T5 until you're ready to make changes that match.
Thread Starter
Joined: Nov 2012
Posts: 672
Likes: 16
From: Michigan
Car: 1988 IROC-Z/G92
Engine: 5.0
Transmission: T-5
Axle/Gears: BW 3.45 Eaton Truetrac
Re: What do I need for the swap? T56 About to purchase...
Joined: Sep 2005
Posts: 27,867
Likes: 2,429
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What do I need for the swap? T56 About to purchase...
What he's trying to tell you is, (as you would learn if you READ instead of ARGUING) you don't have ANYWEHRE NEAR ENOUGH gear for that transmission. As I myself have posted regarding this swap MULTIPLE times. (as you would have found out if you had READ and SEARCHED instead of just spouting off) 3.73 is the BARE ABSOLUTE MINIMUM. (as you'd find out if you READ instead of POSTING a buncha crap) 4.10 is even better. Altogether a better match to the close-ratio T-56, especially with an earlier induction system.
Thread Starter
Joined: Nov 2012
Posts: 672
Likes: 16
From: Michigan
Car: 1988 IROC-Z/G92
Engine: 5.0
Transmission: T-5
Axle/Gears: BW 3.45 Eaton Truetrac
Re: What do I need for the swap? T56 About to purchase...
What he's trying to tell you is, (as you would learn if you READ instead of ARGUING) you don't have ANYWEHRE NEAR ENOUGH gear for that transmission. As I myself have posted regarding this swap MULTIPLE times. (as you would have found out if you had READ and SEARCHED instead of just spouting off) 3.73 is the BARE ABSOLUTE MINIMUM. (as you'd find out if you READ instead of POSTING a buncha crap) 4.10 is even better. Altogether a better match to the close-ratio T-56, especially with an earlier induction system.
However I havent seen this brought up as an issue before. I'm just looking for a bare minimum swap.
The stock cars came with 3.42, I dont believe the information is relevant to my current situation.
No one is arguing here lol.
Though, I do appreciate the bad cop esque approach.
Joined: Sep 2005
Posts: 27,867
Likes: 2,429
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What do I need for the swap? T56 About to purchase...
I know it's been brought up. I've posted it MYSELF numerous times, as a result of my T-56 swap. 3.4x gears, even though factory in the lesser LS1 option packages, are several points short of ... FUN. I MYSELF, in my own posts, have referred to my OWN weenie STOCK 3.73 gears as inadequate. Surely in your searching, reading, research, understanding, absorbing, finding out, lurking without posting unnecessary repetitive questions that have been answered over and over, have run across this? 
Read. Understand. Research. Think. Read. Read. Read. READ. READ. READ. READ. READ. READ. Mouth (keyboard) shut, ears (eyes) open. Transmitter (mouth, keyboard) OFF, receiver (eyes, ears) ON. You'll see, it's all right here waiting for you, nobody wants to spoon feed you the stuff we've all already been posting for the last couple of decades already.
Seriously. Lay off posting and asking the same questions we all asked almost 30 yrs ago now, until you've READ all that we've already posted on this matter. (or at least, most of it)
Yes I have adult children. Yes I went through this in their formative years. Yes my IQ was lower than my shoe size for a long time, until they started paying their own bills; then all the sudden what I've always said, started to come into focus, and my IQ has now risen back almost to my height in inches. YOU TOO can take advantage of my, and LOTS of others', experience, FOR FREE. That's the beauty of Algore's invention of the Interwebz: you get to profit from everybody else's EXPENSIVE mistakes, except FOR FREE. All ya gotta do is, SHUT UP, and instead of blabbering, LISTEN.

Read. Understand. Research. Think. Read. Read. Read. READ. READ. READ. READ. READ. READ. Mouth (keyboard) shut, ears (eyes) open. Transmitter (mouth, keyboard) OFF, receiver (eyes, ears) ON. You'll see, it's all right here waiting for you, nobody wants to spoon feed you the stuff we've all already been posting for the last couple of decades already.
Seriously. Lay off posting and asking the same questions we all asked almost 30 yrs ago now, until you've READ all that we've already posted on this matter. (or at least, most of it)Yes I have adult children. Yes I went through this in their formative years. Yes my IQ was lower than my shoe size for a long time, until they started paying their own bills; then all the sudden what I've always said, started to come into focus, and my IQ has now risen back almost to my height in inches. YOU TOO can take advantage of my, and LOTS of others', experience, FOR FREE. That's the beauty of Algore's invention of the Interwebz: you get to profit from everybody else's EXPENSIVE mistakes, except FOR FREE. All ya gotta do is, SHUT UP, and instead of blabbering, LISTEN.
Last edited by sofakingdom; Jul 12, 2020 at 06:09 PM.
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Joined: Jul 2000
Posts: 6,519
Likes: 91
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: What do I need for the swap? T56 About to purchase...
A 2.66 / 0.50 T56 isn't a "works great with all engines and all gears" transmission. I'm suggesting you do a different engine with that trans. Sounds like you have plans to do so.
Thread Starter
Joined: Nov 2012
Posts: 672
Likes: 16
From: Michigan
Car: 1988 IROC-Z/G92
Engine: 5.0
Transmission: T-5
Axle/Gears: BW 3.45 Eaton Truetrac
Re: What do I need for the swap? T56 About to purchase...
I'm referring to what you have in your profile (go full desktop site and look left under your username) and what you said in your first post.
A 2.66 / 0.50 T56 isn't a "works great with all engines and all gears" transmission. I'm suggesting you do a different engine with that trans. Sounds like you have plans to do so.
A 2.66 / 0.50 T56 isn't a "works great with all engines and all gears" transmission. I'm suggesting you do a different engine with that trans. Sounds like you have plans to do so.
Yeah I apologize for any attitude on my end.
Although this site is a fantastic source for information, the search function leaves a lot to be desired.
Sifting through 20 years of information can definitely take some time, and although a lot of information has been shared, there are new advances in technology, and the desire for this swap has gone up.
So there is bound to be new information/parts to consider.
I just purchased the TORQUE LOCK M78 28 SPL in order to beef up my existing rear.
Once the car is functional, I can start worrying more about the "fun" aspect.
Cause its plenty fun as it is, and I'm sure the new engine and trans will be plenty more fun.
Thanks again for all the help everyone!
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