Interesting conversation re: PCMs awhile back!
Ford also uses that nomenclature (at least it did in the 90s and early 2000s; I've no idea what they call them nowadays).
Which brings me to our Ford Windstar minivan. I'm fairly certain the PCM is failing, because it will behave very erratically when driving. The last time I drove it, it started out okay enough, though shifting seemed a bit sluggish (it's an automatic, and is controlled by the PCM), but after about a half our (20 miles), it began to shift very erratically, and eventually, it was bouncing between all the gears randomly, which rendered it almost undriveable (I barely made it home!) The engine also has a tendency to die at random, or if I quickly accelerate while turning hard in one direction (or sometimes if I accelerate at all).
*Every* mechanic we've taken it to has said they can't find anything wrong (mechanically, it's in fine shape), but most of the mechanics around here don't know how to diagnose PCMs aside from reading off the trouble codes. I've become so profoundly frustrated that I've basically given up on it.
c