When I disassembled the Free Wheeling Hubs on my Hilux, one side didn't have a Spring that holds the Dog to the rear of the Selector. So when I reassembled 'em, I left out that Spring and have had to leave the Hubs Locked. I was going to go to the Junk Yard to get one, but I was surprised to find out that with a Lock Right in it, it makes no difference when in rear wheel drive.