When I purchased my '93, the automatic was available in limited quantities and was available in the later part of the model year. I did see several on the lots around here, but with the 3.0, it wasn't a big seller for lack of power, mostly. The automatic probably made it that much more slower.
In my '93 brochure, it states: BRAKES: (rear) Drums with rear load sensing proportioning valve and rear wheel Anti-lock Brake System (ABS), with a footnote (operates in 2WD only). I would assume that the years following had the same set-up, but I could be wrong. I know that there is a dash-light that comes on when I start mine and it goes thru the lights and ABS or Anti-lock Brakes is one of them.