No end play

I’ve have a Transmission bell or some may call it a big c-clip. I use to build a lot of automatic transmissions so I bought it. It’s very handy. Allows you position the tranny anywhere you need it to be!!

As far as splining the your clutches onto a hub or another drum I have found using some channel locks grab the splin part of the input shaft or any splined shaft and just turn back and fourth real short strokes !! It jiggles all the clutches so they line up and splin correctly !! Everyone has their way of doing things. This works for me very well!! I’ve built a lot transmission of all different flavors!! This has work for me on every one I’ve ever built!!