3/4 ton rear diff help

[michael bustamante]

Ok so I picked up another done truck and pulled the rear end out only to find driver side spi s good but passenger side won't budge. Pulled the cover a d the gears spin around the locked up gear . No glitter in the oil no chipped teeth that I see. Ok so I think maybe the brakes are seized.. now I'm trying pull the drum of and man it's not moving out.. it'll wiggle a little. That's it.
Any ideas why the passenger side would not move at all? And any counters on removing this drum. I'm beating the hell out of it after removing the 2 screws
10 bolt 3/4 ton rear 8 lug