Good luck with the investigation. Hopefully it is something minor. How was the car on the boat ramp with the lower rear gear?I pulled my boat out today with the wagon. As soon as I got it on the trailer and headed home- a metallic screeching noise started coming from under the car. It went away as soon as I touched the brakes. Tapping the parking brake did nothing so I guess it's in the fronts. It sounds like when the wear indicators start squealing, but 10 times worse. I had just swapped rims around and I had eyeballed the pads- they were fine. Something must have broken. I prayed all the way home that nothing would let go and strand me with a boat and trailer in tow! Luckily I made it, now I have to investigate.