C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Spline count on 4 + 3?

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Old Jan 17, 2008 | 06:23 PM
  #1  
Carl Johansson's Avatar
Carl Johansson
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Default Spline count on 4 + 3?

I am in the process of putting a BB into my 88. Believe it or not I will be putting an old 4+3 behind it - running as just a 4 speed. Landspeed car - want the final drive to be 1 to 1, fitment issues - no issues with HP breakage etc.

anyway I have a race clutch that came with the BB. It has a 10 spline clutch plate. I want to see if the local clutch guys can just change out the spline assembly on the clutch to save some money and timew.

So- is the T56 a 31 spline input shaft? or a 27? anyone know right off the top of their head?

Carl Johansson
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Old Jan 17, 2008 | 07:41 PM
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ross.rosseland
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From: Layton ut
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I have a 1986 with a 4+3. Where did your T56 come from?

Anyway, it's a 26 spline input shaft on my 1986.
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Old Jan 17, 2008 | 07:45 PM
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From: Lacey WA RVN 68-69
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The input shaft on the 4+3 is a 26 spline. The 4-speed portion is a Borg-Warner Super T-10, not a T56
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Old Jan 17, 2008 | 07:56 PM
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Carl Johansson
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Originally Posted by c4cruiser
The input shaft on the 4+3 is a 26 spline. The 4-speed portion is a Borg-Warner Super T-10, not a T56
Your right - I misspoke - thanks for the help guys!

Carl Johansson
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