Hi, I need to do the front brakes on my 94 SLT 3.9. I am unsure if I have 2 wheel or 4 wheel abs, and I'm shopping on rock auto and notice they have different rotors for each application. Are the rotors actually different?

 

Looking at the pictures and the specs on the Wagner parts, the 2WD ABS units don't have the tone ring; the 4WD units do.

I'd look at the master cylinder, and follow the lines down.

If they run into a unit below from both halves of the MC, then it's probably 4WABS. If, however, only one half (front and back) goes down to the control box, it's RWABS, and you can skip the tone rings.

OTGH, if you can't figure it out, get the 4WABS rotors; they'll work for RWABS vehicles, they just cost extra.

RwP

 

Clarification: I'm not confused about 4wd vs 2wd.

I am seeing options for 4 wheel ABS, vs 2 wheel ABS.

 

That's what I was talking about, sorry, I wasn't specific.

There's an even easier way to find out: turn your steering wheel all the way right or left, then reach around a tire and feel the back of the rotor.

If you find the tone ring, you'll need 4WAL. If you find the smooth portion of the hub, you don't.

RwP