During 3-point turn at the parking lot at low speed, rear differential seemed to lock up and the right wheel would drag. When I changed gear to reverse and forward again, the problem disappeared. It happened twice.

When stopped at the parking lot, went forward, then switched to reverse, reversed and after switching to forward again, the right rear wheel would be locked up. The truck would drive, but the rear was jumping up and down because the wheel was not turning and was dragging on the asphalt. Then suddenly after a loud bang somewhere below, it would release and drive normally.