My t-case is acting kinda funny. When I start out in first, it seems to be slipping. Sometimes it will slip and then jerk the truck forward. I put it into 4x4 today and it started making a grinding noise, like the chain was rubbing on something. Is there anyway this thing could be partly in neutral, or something else? Probably just worn out I suspect which would be lame since I put it in there only a couple months ago.