Hello, i have a 306 xsi (95), when I put the car into reverse and go back steering either left or right when parking there is a loud grinding-type noise coming from the underneath. I've had the car into 2 garages and they cannot find what might be wrong. The noise can be really loud, I think it's coming from in front of the cab slightly left of centre. Has anyone got any ideas? This noise only happens when in reverse. cheers