Went to visit my son and grandchild and needed to back up the rig uphill on gravel. Pushing ten thousand pounds backwards was just digging a hole and going nowhere. In with the Warn Hubs and down in low range. Up we went into his driveway without hesitation.
Often use 4X4 to drive up onto a block arrangement to get tilt from side to side just right too. It's also essential for launching the boat into the ocean on low tides, pulling others out of tights spots, and inching into places.
Having put in the Warn Hubs was a great addition to this truck. Now I can use low range, and still have only single axle drive as long as the hubs are not engaged.
Don't go without it.