give us a clue? i have a calibra turbo which about a week ago on a long journey started to clonk slightly from first the front an then the rear, it felt like i had run over a small hump in the road every time i touched the brakes(activated the brake light switch). it then started to do it on short jouneys and today has started a nasty rattle which sounds as though its coming from the rear (worse under load) which can be stopped by again pressing the brake. at a guess it may be disengaging 4wd at too higher speed. also to make the car drivable and to minimise further damage i pulled fuse 19 but this didnt disengage 4wd, is there another method of diconnection? i would apreciate any ideas.