How do I put rear output shaft bearing on ????????

I have the Non OD 4 speed apart. I know how to remove the output shaft bearing but the book doesn't specify how to put the bearing back on. It just says to put the shaft in a vice and slide the bearing on the shaft and put the tailshaft on and slide the snap ring into place. Doesn't say if I need to press the bearing on or if I bump the tail housing down after I slide it over the bearing.