I HAVE A 2003 CHEVY SILVERADO EXTENDED CAB 4WD 5.3L 1500. MY PROBLEM IS WHEN I PUT IT IN 2 WHEEL DRIVE IT WILL DRIVE FOR A WHILE AN THEN KICK OUT OF 2 WHEEL DRIVE AN SET THERE AN GRIND SO I HAVE TO RUN IT IN AUTO 4 WHEEL DRIVE, AN IT WILL LOCK IN 4 WHEEL HIGH AN RUNS FINE BUT I CANT GET IT IN 4 LOW. ANYBODY HAVE THIS PROBLEM