What does it mean by the t-case is being "locked" when you switch the Limited into 4H or 4L? Its engaging something that normally isn't. But I guess you're right that something has to be moving in there with AWD.
If it was sagging too much it would have most likely been an improper tongue weight to OA trailer weight. The OP was pretty pointless and without enough info so it does not really merit any response.
I just thought the topic was funny because we just traded in our 11 yo F150 SC yesterday for...
