so i bought this thing with the belief that the head gasket was gone (thats what i was told) however, after playing with the engine and running it for a while, changing the oil and so on, (no antifreeze in oil)  i believe its ok. there is an oil leak but it looks like a rear main.  so i'm thinking it has a tranny issue.  
i think they blew the tranny and the 'buddy' they talked to thought it was a head gasket for some reason because it was so full of oil, (chick who owned it over filled it)
so, put it into gear a couple times. first time, it doesn't do anything. give it some gas, and it literally revved to 2500 before it did anything.  then a very horrible squeel was heard, a constant squeel.  did it in first/reverse and even neutral. this was the only time the jeep would move.  
so i'm thinking tranny is shot or something.   any ideas on a quick fix?  if not,  any ideas otherwise?  tranny is the 42RE and 4.0l engine. i'm debating an AW4 swap.........
thanks guys!