I have a 2005 Insight manual 5 speed w/ AC with approximately 3500 miles on it. Something feels like it disengages and then makes this awful grinding clicking noise whenever I brake over a small bump in the road. I have tried various combinations of clutch and shift states and it always happens. When I brake down a steep hill, it seems to be better if I shift to neutral after the charge level kicks out and release the clutch before I begin hard braking. However, nothing seems to work if I'm just coasting at low speed on a flat road and brake over a manhole cover. It is so disconcerting to drift over the lip in my driveway at 10 mph and feel that "dit dit dit dit, dit-dit, grrrrrrr...." . Is this something to worry about, or just a strange ABS? Thank you.