Hello again Houndz, this is a hell of a coincidence - mine was doing this too 2/3 months after I replaced my discs and pads.
Again my brother sussed out that the pads had gone brittle and shiny with probably getting hot. He thinks that because the car is so heavy that if you are braking hard that the pads will get extremely hot and then will go brittle and shiny.
He says that the pads do slightly touch the discs when you're driving normally and that is what the squeak is - the pads rubbing against the disc but in their brittle state. Once you apply the brakes , because they go full onto the disc, then the squeaking stops.
What he did was he roughed the pads up so that they weren't smooth any more and that has done the trick.
You don't happen to have a slight oil leak as well do you - that's my third problem?????
