Removing intermediate gear from output shaft

[DD931]

I have been inventorying some tranny parts and want to remove an intermediate gear from the output shaft it runs on. I have the synchronizer assembly off and there doesn't seem to be any reason why this gear shouldn't just slide off, but it won't!! I don't see any pins or similar stuff called out in the Green Book. It turns fine on the shaft, but won't slide off!! Help!!!