what do you mean by "front axles have a lot of play" if your driveline is turning in 4wd, but your wheels aren't, your hubs could not be fully engaging or your axles are broken, or your ring and pinion is broken. those are really the only things that can be wrong. pull your axles out all the way to see if they are damaged at all. if not, then drain the front diff to see if any metal chunks or shavings come out. if your fluid is fine, then you probly have an issue with your hubs not fully engaging.
