Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Flywheel options

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Old May 11, 2025 | 01:08 PM
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straightbuchana's Avatar
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From: White, Georgia
Car: 82 Pontiac Trans Am
Engine: 350 Vortec, sprayed
Transmission: T56
Axle/Gears: Spooled Strange 12 bolt, 3.73 gears
Flywheel options

Hey folks,

I have an LT t56 in my car. What externally balanced flywheel options do I have for a 1 piece rear main 350?

Thanks for any help
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Old May 11, 2025 | 02:34 PM
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Car: 15 Ram, 88 IROC, 92 RS
Engine: 5.0
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Axle/Gears: 3.42 (4th Gen)
Re: Flywheel options

Are you attempting to build a stroker? Why the need for externally balanced?
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Old May 11, 2025 | 04:08 PM
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From: White, Georgia
Car: 82 Pontiac Trans Am
Engine: 350 Vortec, sprayed
Transmission: T56
Axle/Gears: Spooled Strange 12 bolt, 3.73 gears
Re: Flywheel options

Originally Posted by ratfink6923
Are you attempting to build a stroker? Why the need for externally balanced?
I believe the LT is externally balanced.
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Old May 11, 2025 | 06:26 PM
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Re: Flywheel options

I believe the LT is externally balanced.
It is NOT. Like SO MANY things these days that seem to attract the same kind of mental midgetry, you CANNOT "believe" something into existence.

It is INTERNALLY balanced like ALL other SBCs other than the 400. Just, the last rearmost little bit of INTERNAL balance weight, which used to be located on the crankshaft flange in the 85-back engines, had to be relocated to the flywheel or flex plate in the 1-pc RMS engines, since the flange then had to be round. That DOES NOT make those engines "externally" balanced.

Here's what the old balance weight for 3.48" stroke cranks used to look like. The 86-up motors are balanced EXACTLY the same as this, INTERNALLY, just, that little bit of INTERNAL weight is located on the bolt-on piece instead of on the crank. That DOES NOT make them "externally" balanced any more than it being located outside the oil pan made 67-85 350, 305, 262.5, & 267 "externally" balanced.



All that aside, the 86-up 305 & 350 have the same INTERNAL balance as the 92-97 LT1, with the little bit of INTERNAL weight relocated to the flywheel. A stock LT1 flywheel, or aftermarket one for the same application, will work fine on your 1-pc RMS 350 since they share that same INTERNAL balance scheme.

Last edited by sofakingdom; May 11, 2025 at 06:29 PM.
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Old May 11, 2025 | 06:34 PM
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From: Tampa, FL
Car: 15 Ram, 88 IROC, 92 RS
Engine: 5.0
Transmission: Auto
Axle/Gears: 3.42 (4th Gen)
Re: Flywheel options

Yeah! What he said!
Good luck on your hunt.
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Old May 11, 2025 | 07:01 PM
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straightbuchana's Avatar
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From: White, Georgia
Car: 82 Pontiac Trans Am
Engine: 350 Vortec, sprayed
Transmission: T56
Axle/Gears: Spooled Strange 12 bolt, 3.73 gears
Re: Flywheel options

Originally Posted by sofakingdom
It is NOT. Like SO MANY things these days that seem to attract the same kind of mental midgetry, you CANNOT "believe" something into existence.

It is INTERNALLY balanced like ALL other SBCs other than the 400. Just, the last rearmost little bit of INTERNAL balance weight, which used to be located on the crankshaft flange in the 85-back engines, had to be relocated to the flywheel or flex plate in the 1-pc RMS engines, since the flange then had to be round. That DOES NOT make those engines "externally" balanced.

Here's what the old balance weight for 3.48" stroke cranks used to look like. The 86-up motors are balanced EXACTLY the same as this, INTERNALLY, just, that little bit of INTERNAL weight is located on the bolt-on piece instead of on the crank. That DOES NOT make them "externally" balanced any more than it being located outside the oil pan made 67-85 350, 305, 262.5, & 267 "externally" balanced.



All that aside, the 86-up 305 & 350 have the same INTERNAL balance as the 92-97 LT1, with the little bit of INTERNAL weight relocated to the flywheel. A stock LT1 flywheel, or aftermarket one for the same application, will work fine on your 1-pc RMS 350 since they share that same INTERNAL balance scheme.
I BELIEVED it, per info on Google. I was definitely up to be corrected in a manner that isnt rude just for a mistake. There was no reason for the attitude in your first paragraph smh. Thanks for the info, I appreciate it, but this is exactly why I don't do forums anymore. Thanks.
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Old May 11, 2025 | 08:39 PM
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Re: Flywheel options

I BELIEVED it
:shrug:

Sorry to hear that.

The Google isn't perfect. Most especially, It responds to whatever appears on The Interwebz the most, whether correct or not. Kind of a shame really butt that's the way the cookie crumbles.

that isnt rude just for a mistake
Glad of course that no one was "rude", butt instead, merely FACTUAL. "Rude" would certainly be ... unwelcome.

​​​​​​​this is exactly why I don't do forums anymore
Also glad that you did this time, got the answer you needed, ALONG WITH THE REASON WHY, and are so grateful for the info you received. I appreciate your heartfelt gratitude for being delivered out of your state of INCORRECT "belief". I feel slightly warm, even almost ... fuzzy.
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Old May 11, 2025 | 08:47 PM
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straightbuchana's Avatar
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From: White, Georgia
Car: 82 Pontiac Trans Am
Engine: 350 Vortec, sprayed
Transmission: T56
Axle/Gears: Spooled Strange 12 bolt, 3.73 gears
Re: Flywheel options

Originally Posted by sofakingdom
:shrug:

Sorry to hear that.

The Google isn't perfect. Most especially, It responds to whatever appears on The Interwebz the most, whether correct or not. Kind of a shame really butt that's the way the cookie crumbles.



Glad of course that no one was "rude", butt instead, merely FACTUAL. "Rude" would certainly be ... unwelcome.



Also glad that you did this time, got the answer you needed, ALONG WITH THE REASON WHY, and are so grateful for the info you received. I appreciate your heartfelt gratitude for being delivered out of your state of INCORRECT "belief". I feel slightly warm, even almost ... fuzzy.
The first paragraph was rude, whether you want to believe it or not. Chat GPT actually answered and gave some good results though, so I'll just stick to it. I already get enough attitude from "men" wanting to act tough. I appreciate your info after, but the first paragraph like I said was unwarranted. It seemed as if the LT had a bastard balance to me and I figured it was external balanced on the rear. You didn't have to be sassy to explain that. Yet again, thanks, but I'll just go to chatgpt in the future at this point. Hope you have a great day!
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Old May 11, 2025 | 09:42 PM
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Re: Flywheel options

The first paragraph was rude
No it wasn't.

​​​​​​​whether you want to believe it or not
Doesn't matter whether I do or not. Doesn't matter whether YOU do or not. Facts are facts. Fact is, I was not "rude". Regardless of your "belief" on the matter.

Glad you found out what you needed to know. Too bad you have to have ATTITUDE toward the people who set your feet on the path to TRUTH and away from BELIEF. Must really SUCK to live in a world where "belief" is more important than TRUTH.

Have a nice day.
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Old May 11, 2025 | 10:59 PM
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From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: Flywheel options

Did you order the CODE RED?

Last edited by NoEmissions84TA; May 11, 2025 at 11:07 PM.
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Old May 11, 2025 | 11:18 PM
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Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: Flywheel options

Originally Posted by straightbuchana
It seemed as if the LT had a bastard balance
The 86-up production vehicle 5.0, and 5.7 SBC Gen I and 4.3 and 5.7 Gen II engines all use the same balance weight on the flexplate / flywheel.
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Old May 12, 2025 | 06:47 AM
  #12  
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Car: 82 TA
Engine: Zz430 clone w a torquestorm blower
Transmission: Magnum f
Axle/Gears: Ford 9 w 4.11
Re: Flywheel options

To the OP. Ram clutch makes a conversion for a normal push style flywheel/disk/clutch and hydros. It's a kit. I'm pretty sure you can get it for 85 and older sbc. These eliminate all the stock lt1 clutch components and uses the stock lt1 trans and bell.

idk if this helps your conundrum or not.
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