Brake shudder and flashing lights.

My first ever post. 2012 Crewmax with brake shudder. Third set of brakes in one year, driving about 20k miles/12 months. Shudder starts few weeks after brake replacement with good rotors and pads. Initially at highway speeds then progresses to sub 20 mph over few months. Replaced wheel bearings and a bent right rear axle two brake changes ago.Unrelated to this(?) flashing Hi/Lo, constant ABS light. Code says bad RR speed sensor. Replaced no change. I replaced an abraided wire to that sensor which fixed issue for 3 months, but issue returned. Wire ok.