look under the hood and at the master cyl. if there are 2 solonoid looking things with a plug coming out of them and IIRC 3-4 brake lines coming out of the block (from the master cyl and then to the rear of the truck) they are hooked to then it only has rear wheel ABS. if the lines off the master cyl go to a pump with alot of brake lines coming out of it then it has 4 wheel ABS

 

no pump on mine just a few lines and a couple wires

 

then locking of the front wheels under hard/severe braking is normal. the rears should never lock up.

 

well i dont even hit my brakes hard enouph now with this exhaust brake, i figured i would try to get it fixed before winter so i dont slide all over the place

 

I had a 94 none diesel Ram that locked up the front brakes only on the first stop or two when it was damp out, after that they worked fine. It turned out to be bad front rotors. They had a few gouges in spots that I think were cause by the pads rusting against them.

 

Any updates?