R & R BJ8 Transmission Bearings Procedure

[AUSMHLY]

What is the procedure or how do I remove and replace the transmission bearings on the 1st motion shaft and mainshaft.
I don't have a press. Thank you in advance

 

[AUSMHLY]

I found the bearing on the 1st motion shaft was a very tight fit. I needed to continually tape it gently all around to get it off.

The mainshaft bearing was easy to pull off by hand.

It's my understanding both bearing need to be pressed on or tapped on for a tight fit.
If they are pressed on, should I be concerned that the mainshaft bearing slid off by hand?

The mainshaft bearing has a tight fit in the bearing housing. The housing doesn't have a tight fit in the transmission and I can spin it by hand to line up the pin with the pin hole in the OD. That will keep the housing from rotating in the transmission case. How tight should the bearing housing be in the transmission?

I'm trying to locate the area(s) that's causing problems with loud gears, gears chipping and finding metal filings.
I'm thinking there's too much slop or float with the 1st input shaft or mainshaft or both. That may cause too much play between between the two shafts. There is a new cage roller bearing there. I have also installed a new bush spigot in the engine. The laygear has .012 end float.

Should I be concerned that the mainshaft bearing slid off by hand?