Re: Welcome to our new forum! Welcome to the GGC Autocross Program › Forums › GGC Autocross Forums › Autocross Discussion › Welcome to our new forum! › Re: Welcome to our new forum! February 22, 2012 at 1:21 am #419 Hal DortonParticipant Clunking can be the wheel bearing, FCAB, and even your sway bar end links. Get the car in the air and bang the tire with a rubber mallet. You’ll hear the rattle.