Try taking a hydraulic bottle jack, put it on the floor with the ram on the snout of the housing by the flange and jacking it up a little bit. That should break it loose. PB will not help on the FIPG stuff.
With it like this, use a hammer & tap around the diff til it pops free
![Fingers Crossed :crossed:](https://board.marlincrawler.com/Smileys/marlin/crossed.gif)