I have a '99 Chevy Suburban that clunks when you accelerate and go over a bump at the same time. I was at a stop light the other day and a similar suburban did the same thing. Is anyone else having this problem? The garage first told me that my transfer case was going, then they told me my rear axels were falling out because the rear differencial was floating???? At this point I don't believe them much. has anyone else expereinced anything similar before I go spend $$$ on a new rear end.