When inspecting my ABS system, I found the probable cause of the ABS light on and trac warning light flashing to be a cracked reluctor wheel on the left front. It will spin loose on the axle thus setting off the warning. When the vehicle is stopped and off and started again, the lights will not come on until I get up to about 15 mph at which point, the reluctor wheel begins to slip thus setting off the alarm. The brakes operate normally but if an icy road should turn up and I need the ABS system to function properly, I will probably be in trouble.. I can't seem to find a new reluctor wheel as Ford evidently doesn't manufacture them any longer. My best choice seems to be to replace the entire half axle as a new axle comes with a new reluctor wheel. Any one else ever have this problem?