Point me in the right direction

[low79fx]

I have a right rear axle leak.I tore into rear end pulled axle and seal is on axle tube behind a pressed on sealed bearing on axle.When replacing this bearing do you heat the axle to drop bearing on axle or do you heat bearing on hot plate or something and drop on axle.What I have as far as rearend is a dana44,10bolt differential.Or can bearings be replaced to where gear oil can lube bearing with seal on the outher side of bearing?Has anyone out there done this replacement or upgrade?Also is there a link here with a n exploded view of this teardown?HELP!!!