wHEN I PUT MY 2001 SCREW IN 4 WHEEL DRIVE I HEAR A HUMMING COMING FROM THE FRONT END , THEN WHEN I DISENGAGE IT IT CONTINUES LIKE ITS STILL IN 4 WHEEL MODE. BUT ITS NOT BECAUSE IT DOESNT BIND IN TURNS. THEN IT SOMETIMES CLUNKS AND THE WHINE GOES AWAY. WHATS GOING ON HERE???

 

mine humms when I disengage until I let of the gas and push it in again then its back to normal