Virtual Jeep Club
You must have the stub shaft in place or you will destroy the unit bearing as mentioned. Also the axle will have to be removed and axle tube plugged to flat tow, transfer case in neutral and transmission in park or reverse, this turns the oil pump in the transfer case.
The link above will take you to an online club with many local people that are very helpful, most likely get a used axle for your dana 30 for a very good price and maybe even help installing, most have changed at least one axle on the trail at some time.