What was found
ANTI SKID - DURING TAKEOFF ROLL & PRIOR TO V1, THE ANTI-SKID LIGHT ILLUMINATED. THE F/O CALLED ABORT, APPLIED BRAKING AND T/R'S. APPROXIMATELY, 1500 FEET PRIOR TO THE AIRCRAFT EXITING THE RUNWAY, I STARTED TO LOSE DIRECTIONAL CONTROL. "CORRECTIVE ACTION" REMOVED ANTI-SKID CONTROL BOS P/N 9912489-9 S/N 578 AND INSTALLED CONTROL BOX P/N 9912489 S/N 750. FOUND LT MLG WHEEL SPEED TRANSDUCER WITH ONE MOUNT SCREW TOO LONG CAUSING TRANSDUCER DIFFICULT TO SPIN. REMOVED AND REPLACED LT MLG WHEEL SPEED TRANSDUCER P?N 9912305-2 S/N 7202 AND INSTALLED TRANSDUCER P/N 9912305-2 S/N 2893.