Bearings are pressed in. You can pound out the shaft with the input bearing on it. same with two others. They all came out very easily. If you need to, buy the 12 ton bearing press from Harbor freight then return it after you press in the bearings.
Torque for the screws is bottom them out then a quarter turn. (this is from the guy in LA who rebuilds these transfer cases) There are no torque values listed anywhere.