i had the same issue with my 01 isuzu rodeo sport/amigo, but in my case it was 2wd and there was fluid that came out and the news was that the tranny died. the wird thing was that it actually stilled moved when u left it in drive and it drove only 5 miles an hour, just enough to ove out of traffic and find a place to get a tow truck. i hope this is not your case, keep us posted.