ok on my 2000 F 150 ex cab 5.4 4x4 i have a little brake problem, whenever i get the truck up to speeds around 85 or 90 for a period of time say 5 min and hit the brakes suddenly i get a noise similare to that of worn out rotors. The pads and rotors are fine, and it only dose it at these speeds except for Every great once in a while it will do it at normal speed,and I know i don;t need to drive that fast but any way the point is it shouldn;t do this

 

Never been aware of any particular noise associated w/"worn out rotors".

Some brake noises are related to sticking calipers or stiff piston seals.

 

ok it sounds rough, like worn out pads on rotors

 

I would think that noise is the ABS Computer if you have that. It also means you may have air in the Computer module.

 

well i don;t think its the abs making noise if thats what you mean because i don;t push the brakes hard enough for them to work but your answer seems to make the most sense so far, how do you get the air out of the module, also i know how to do a lot of work myself but if i did take it to a shop do they have a way to diagnose brake problems