Chevy Tracker 1999 4W

[tonio424]

Hi Folks :
I'm new at this so please excuse xany dumb mistakes i surelly will make My Chevy Tracker 1999 (good wheels) started making a grinding noise (some times) when is in light 4wd ,as I make a hard right turn, other wise it drives normally. Twice of late the front whells have locked when parked after I disengage to ergular2WD ,after I back up a bit ait's OK again. my concern is the ramdom noise and the locking of the front wheels . Please give advise or cause if posible Thank You: Tonio424