i have 2 buddys with the same problem, above 65 mph the brakes do nothing, you just get the grinding feeling in the pedal like you do when your abs is kicking in. One of them is a 94 2500 auto and the other is a 97 3500 manual. Anybody have some ideas?

 

Do you mean above 65mph they have NO brakes ?

 

yes thats exactly what i mean

 

That's scary. In the words of Click and Clack - get it to a shop quick. Well, no, not quick. Drive slowly to a shop and have the brakes checked out. Then post back and let us all know what was found.