Thanks, Dave. It does look and sound simple.

Nuke, yes, that stick, the 2H-4H-4L selector. Visually it seems to be stuck in the lower right position, which doesn't make sense since none of the settings are in that position. The stick won't move no matter what I do. I searched online for instructions on how to shift (I don't have a manual yet) but still couldn't get it to budge.

The other night I tried one more time, then turned off the truck. The next morning I put it on reverse and the truck would not move. Put in on drive and heard a lound CLANG!, then it moved fine in both directions. Something really seems to be messed up in there, I think.