Did you undo the drain? What is it made of? If cast iron, the thing could weigh over 300#. Cast can be broken by sledge (wear protection - the shards can be very dangerous). A fiberglass or acrylic can be cut up with a sawsall. Sometimes, people will use expandable foam under those things...sticks VERY well. To put in a new one, use a plastic sheet over whatever you bed the thing in to make it easier for the next guy.