Here is a reply to what I think the problem is; The wheel won't release from the axle with the retainers removed, correct? It won't!! I've tried everything except removing the axles from the trans and taking it to the press. The taper fit wheel / Axel soon fuse together after a short time from the original assembly at the factory. All is not lost, just muscle the tire from the wheel and install the new one the same way trying not to screw up the bead, use blunt dull things not sharp screwdrivers, use lots of soapy water, or better yet flat proof to lube things up. Use a new tire valve, cheap insurance, leave about an inch of flat proof in the bottom of the tire.