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

T5 to T56 conversion

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Old Jan 23, 2015 | 03:06 PM
  #1  
tonys91rs's Avatar
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From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
T5 to T56 conversion

I've got a 91 tpi t5 that I'm converting to t56. I searched and found a lot on the auto to t56 conversion but not as much for my project.
The t56 was on a 350 so it's a 93-97. Other than the clutch and cross member, what else will I need? Can I use my pedals and do I have to modify the tunnel?
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Old Jan 23, 2015 | 04:24 PM
  #2  
RamIt's Avatar
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From: El Sobrante, California
Car: 1984 z28
Engine: Crate replacement L31R 350
Transmission: T56
Axle/Gears: 7.625" 28 spline 3.23
Re: T5 to T56 conversion

http://www.skulte.com/T56.html
https://www.thirdgen.org/forums/tran...-t56-swap.html
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Old Jan 25, 2015 | 08:25 AM
  #3  
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: T5 to T56 conversion

More gear than 3.27 if it is a 94-97 box.
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Old Jan 25, 2015 | 10:04 AM
  #4  
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: T5 to T56 conversion

Originally Posted by jmd
More gear than 3.27 if it is a 94-97 box.
Depends on your motor and expectations.
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Old Jan 25, 2015 | 10:22 AM
  #5  
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jmd
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: T5 to T56 conversion

Originally Posted by naf
Depends on your motor and expectations.

Whereas OP lists a speed density LB9 and 3.27 rear, I have it on good faith he will accept you funding a turbo build. Preferably in small bills.

If you'd like to add something meatier to the discussion about your own experiences, engine, trans ratios and rear gears, please do.

Until either of those occurs, A 3.27 rear and 0.50 are a poorly matched overall combination with the vast majority of SBC builds.
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Old Jan 25, 2015 | 10:46 AM
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: T5 to T56 conversion

Yes my comment was a little more universal than yours (I missed the 5.0).

My personal experience is with a vortec 350 with the hot cam. I find it has plenty of low end torque to overcome the slightly handicapping rear gears. Faster with more gear? Probably, but it would also be faster with more cam. The street must be a compromise and my camaro has well defined manners and enough grunt to be fun.

Peace?
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