OK, that's a clutch type, so you have the thrust buttons which is correct.
Now back to my question, do you have the axles set into both sets of splines on both sides? If not, they won't contact the thrust buttons, which will prevent you from setting your axle end play.
Inside the splined area where the axles go in is two sets of splines on each side. It's easy to get them in the first one, but the second can be a bit difficult if they aren't lined up.
Try gently rotating each axle and use inward pressure to see if they pop in another 1/2 inch.
