I have a 94 B4000 (4.0l V6) with 5sp manual tranny, 4x4. It is fairly new to me and when I got it, the PO had just had a new clutch put in (with slave cyl). I beleive it has an M5OD tranny.
It has been running very well, with one problem: every so often there will be a bearing noise (squeal)...