I think I’m having a similar problem. I can’t get it any further than this...I just keep moving the whole thing back and forth without making any inward progress. Plus this keeps happening on the rear side...the inner race / collar pushes out.On the counter shaft I seated first by tapping in as mentioned and then had to lift the whole thing over to the press for final pressing in order to get the snap rings on. Shoulda took some more pics. The front countershaft bearing has en external ring to seat against the housing, just like the mains, so I had to get that front to center to sit solid on the shaft using the press while supporting the backside of the shaft on a plate, otherwise the groove for the front countershaft snap ring wasn't exposed enough.