What size flywheel on T-56?
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From: Mountain View, CA
Car: 1991 Chevrolet Camaro Z28
Engine: 350
Transmission: Tremac T-56 6 Speed
Axle/Gears: 10 Bolt 3.73 POSI
What size flywheel on T-56?
I have a T-56 on my 91 camaro Z28 that needs a clutch. Does anybody know what size flywheel it has?
Thread Starter
Junior Member
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Joined: Oct 2006
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From: Mountain View, CA
Car: 1991 Chevrolet Camaro Z28
Engine: 350
Transmission: Tremac T-56 6 Speed
Axle/Gears: 10 Bolt 3.73 POSI
Joined: Sep 2005
Posts: 27,893
Likes: 2,436
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What size flywheel on T-56?
Flywheels are not 10" or 11".
Flywheels are 12.8" or 14".
The ONLY flywheels that work with the T-56 happen to be 12.8".
It happens that the clutch disc diameter is about 10.4" in a T-56, maybe a little larger. Not 11". Doesn't too much matter, the WHOLE REST OF THE CLUTCH is completely different from any other clutch. A T-5 application clutch, for example, will NOT work.
Bottom line: doesn't matter what size the clutch is. Either it IS as T-56 clutch, or IT IS NOT a T-56 clutch.
If you need a clutch or flywheel, buy the one for T-56. It will be the size that it is. The ONLY size that there is and that will work.
Flywheels are 12.8" or 14".
The ONLY flywheels that work with the T-56 happen to be 12.8".
It happens that the clutch disc diameter is about 10.4" in a T-56, maybe a little larger. Not 11". Doesn't too much matter, the WHOLE REST OF THE CLUTCH is completely different from any other clutch. A T-5 application clutch, for example, will NOT work.
Bottom line: doesn't matter what size the clutch is. Either it IS as T-56 clutch, or IT IS NOT a T-56 clutch.
If you need a clutch or flywheel, buy the one for T-56. It will be the size that it is. The ONLY size that there is and that will work.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: What size flywheel on T-56?
Well, actually the clutch for an LT1 T56, LS1 T56, and aftermarket T56 are all different, so he needs to know which version of T56 he has.
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iTrader: (1)
Joined: Aug 2005
Posts: 294
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From: Middle GA
Car: 1992 RS
Engine: Vortec Headed 383 9.6:1
Transmission: TKO600
Axle/Gears: 10 Bolt Posi 3.73
Re: What size flywheel on T-56?
It's also possible that he is using a T5 bellhousing with an adapter plate thus using stock hydraulic set up and flywheel/clutch set.
Joined: Sep 2005
Posts: 27,893
Likes: 2,436
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What size flywheel on T-56?
Right; IF AND ONLY IF it's not the LT1 version, since there's NO WAY to use that with the stock T-5 BH.
My comments were referring to the LT1 version. Kevin's comment is true.
My comments were referring to the LT1 version. Kevin's comment is true.
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Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Thread Starter
Junior Member
iTrader: (1)
Joined: Oct 2006
Posts: 57
Likes: 0
From: Mountain View, CA
Car: 1991 Chevrolet Camaro Z28
Engine: 350
Transmission: Tremac T-56 6 Speed
Axle/Gears: 10 Bolt 3.73 POSI
Re: What size flywheel on T-56?
Flywheels are not 10" or 11".
Flywheels are 12.8" or 14".
The ONLY flywheels that work with the T-56 happen to be 12.8".
It happens that the clutch disc diameter is about 10.4" in a T-56, maybe a little larger. Not 11". Doesn't too much matter, the WHOLE REST OF THE CLUTCH is completely different from any other clutch. A T-5 application clutch, for example, will NOT work.
Bottom line: doesn't matter what size the clutch is. Either it IS as T-56 clutch, or IT IS NOT a T-56 clutch.
If you need a clutch or flywheel, buy the one for T-56. It will be the size that it is. The ONLY size that there is and that will work.
Flywheels are 12.8" or 14".
The ONLY flywheels that work with the T-56 happen to be 12.8".
It happens that the clutch disc diameter is about 10.4" in a T-56, maybe a little larger. Not 11". Doesn't too much matter, the WHOLE REST OF THE CLUTCH is completely different from any other clutch. A T-5 application clutch, for example, will NOT work.
Bottom line: doesn't matter what size the clutch is. Either it IS as T-56 clutch, or IT IS NOT a T-56 clutch.
If you need a clutch or flywheel, buy the one for T-56. It will be the size that it is. The ONLY size that there is and that will work.
Joined: Jul 1999
Posts: 12,088
Likes: 125
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Re: What size flywheel on T-56?
The dual-mass flywheel was a ZF6 thing, because they felt it would take out
the vibes better than a sprung hub.
Yeah, they are 11" not 10.5". I don't know why the thirdgens ran a 10.5" clutch. I'm running a thirdgen flywheel in my corvette with an 11" clutch. The bolt pattern for the corvette/lt1 11" stuff is the same as the T5 10.5" stuff.
-- Joe
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From: Taylors Falls, Minnesota
Car: 1983 Z/28
Engine: Edelbrock 355
Transmission: T-56
Axle/Gears: 3.42/Zexel/PBR
Re: What size flywheel on T-56?
well according to his sig he has a tourqe converter not a flywheel at all 
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