Quoting brunoboy:
thanks for the info, lets say i have a 22 spline t-case. and i bought a 23 spline tranny. how does that work?
Like number3 posted, just pop off the end of the tranny and swap the shafts. I ran into the same issue thinking all W5M31 tranny's were 22 spline, which I didn't know was wrong until I had the new one up into my car and couldn't figure out why my transfer case wouldn't bolt back on.
Also, everybody told me that the shaft should just pull out, but not with mine. It did on my new tranny, but my old one took a little bit of force to get it out.