My buddies and I were on the beach, not driving insanely hard, but were in 4x4 and started smelling some transfer case, so we stopped and were hanging out while that cooled off, and when I began driving again, it wouldn't let me go into 4 low at all and 4 locks only when the truck is off.

When I turn it on, it says "service ABS" and "4wd temporarily unavailable," This hasn't gone away by abs, and TRC lights are on.

The truck runs and drives fine; just hoping someone knows what could have happened.