This sucks and probably sounds kind of dumb, but I am having the biggest trouble getting the front wheels off my truck (X-cellerator). For some reason, my bearings won't want to slide off of the threaded part of the front axle. This isn't even the first time this happened to me. I got one of them off, but I fried the axle in the process. Luckily I happened to have one replacement. Now, I'm stuck on the other one and I don't know what to do because I don't want to break anything. Has this happened to anyone else? What did you do?

What is causing them to stick?
are you driving it through water or mud?
I bet they are rusted on, try a little wd40 or other penetrating oil