30 spine 27 spine?
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Junior Member
Joined: Jul 2010
Posts: 70
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From: Lowell, Mass
Car: 86 T/A GTA Rims
Engine: 350 Mild cam 750 holly
Transmission: Beefed 700R4
Axle/Gears: 2.73
30 spine 27 spine?
On the spine there is a small one that has 27 spines and a big one that has 30 spines which one do i count for the TC, the big or small one?
Joined: Jul 2000
Posts: 6,530
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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: 30 spine 27 spine?
The input shaft (27.)
If it's a 700-R4, it's an 84.5 or older unit.
If it's a 700-R4, it's an 84.5 or older unit.
Supreme Member
Joined: Jul 1999
Posts: 3,484
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From: Calimesa, California, U.S.
Re: 30 spine 27 spine?
Measure the input shaft diameter. The 27 spline is apx. .890" in diameter, and the 30 spline is apx. .990" in diameter. Mid 1984 is where it went from 27 to 30 spline.
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Silver83
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Jan 6, 2008 02:18 AM
