I know the 4500 is, but don't know what the 3500 is.
Any of Chevy's 4x4 manual transmissions should be 32-spline, IIRC.
I know the 4500 is, but don't know what the 3500 is.
With chevy blazer temporarily out of action I can't take this apart.

That's funnywhen the th400 goes out.
