Trying to change trans fluid..I'm stuck

[Adam]

I'm in the middle of the process and all the nuts and bolts came out fine but the aluminum belly plate is stuck. It's hung up on 1 bolt on each side of the plate...specifically the threads because the holes in the pan weren't quite cut big enough imo. Hans must've jammed the plate on and locked her down with a nut. I've pulled like mad and banged on it with a rubber mallet and she's not going anywhere. Have any of you guys encountered this problem as well and if so any suggestions? Here are some pics to show...it's the lower bolt in the pictures giving me problems and its the same way on the other side. Everything else is free and loose.