I haven't been able to pinpoint or isolate exactly when it happens but seems as if I get, not a deep one, but like a metallic grinding sound from somewhere in the front end when the ABS kicks in on say if the wheels are slipping. We just really gotten to use the 4wd for the 1st time this w/e and didn;t hear it so I'm ruling out anything w? the transfercase (had to have a couple of seals replaced a lil while back). I was trying to listen to see if it may be the ABS pump or something but when it happens it"s too brief to really catch it and of course I haven't been able to intentionally replicate it. Anyone have something similar or an idea of where to look?