the two rear end i've pulled came out no problem, it might be catching on the metal sleve inside the bushings. when the torque & trailing arm bolts are tightend down it will pinch the frame brackets that the arms go into. try and pry them out if you can and see if it lets go. i had a 3/4 ton floor jack under the dif and was able to just pull the whole rear out easily on both cars. always found it was harder getting them back in with new bushings not removing it. if everything is unbolted and disconected it should come out pretty easy.

good luck.