I guess my experience doesn't involve specifically these trucks so I'm, what experience I do have is on 4x4 models with the unit bearings so you cant really install them incorrectly, my experience on 2wd axles with taper roller bearings there is a separate tone wheel on the hub itself, I cant say that specific to dodge though as I've never owned a 2wd ram, at least not one in an era that abs was even a thought

 

Yeah, I'm speaking about bearings that go into a hub knuckle, not a spindle. Clearly a spindle bearing would be tapered so it would be impossible to put it in backwards (or at least utterly ignorant).

 

On my Cougar - the front tone rings are on the hub bearing assembly.

(On my Cougar, the rear tone rings are ... at the inside, at the differential, due to being an independent rear suspension.)

I'll have to dig into my 1993 book, make sure it also offered 4WAL.

RWAL was introduced about 1991 or earlier to make up for the discontinuation of the load sensitive proportioning valve. I WANT to say with the 1990 MY, but that's from memory and my books are at my house, not where I am.

RwP