I backed up my 2003 ranger edge and heard a loud pop. Then it locked up. Put it in 1st and moved about a foot then locked up. It feels almost like the e break is stuck but it isn't. It will not even roll down a hill in netural. Any ideas?. It's a 5 speed manual with 4x4

 

Try to jack it up and see if your rear end is free you might of broke something in you rear end or a u-joint