CK5
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spline check

Is it 31, or 30 spline?

If its 30 spline, I counted 30 on the end of the shaft.

Also, check out TCI, they list 27, and 30 spline for the torque converters....

http://www.tciauto.com/Products/GM/gm_4L60E.asp

EDIT: I`m going to assume that 31 spline was a typo, kenny, as Scott also says it a 30 spline, and everywhere lists 30 spline converters.

So that means it IS 30 spline. PHEW!

Thanks for helping me sort that out guys!
Ok, so the 30 spline is the smaller(outer, red arrow) part of the shaft and 27-spline is the larger(inner,green arrow) part?
 
The part with the green arrow on it is part of the pump, not the input shaft. All that matters is the input shaft spline count.
 

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