Hi All. I've had my 2007 ex ambulance T5 for more than 12 years. The vehicle was a bush retrieval vehicle so it came with bilstein suspension (slightly raised) and a locking rear diff. I've had strange noises from the front right strut top mount off and on for the life of the vehicle, this turned into knocking recently so I had the strut top mounts and bearings replaced. Now the vehicle has a groaning noise from the front right strut top. This happens in a straight line as well as turning. The damping is smooth as silk and the steering is fine. Does anyone have any ideas ?