How do I know spline count?

[laser92awd]

I have a 92 AWD with stock tranny and transfer. I am going to be buying an AWD tranny at some point but I have no idea what the spline count is on the output shaft of my tranny. Is there any way I can determine this with the tranny still in the car? I want to make sure the tranny I get will mate up to my transfer case.

Thanks everybody!

 

[CraigB]

You can pull the transfer case and count the splines. I think you would have a 22 spline.

 

[laser92awd]

Do I need to drain the tranny or transfer fluid to do this? Do I count the outer or inner edges?