If it is a lunch box locker, then do not try to substitute the whole carrier. If you do that, you will have to reset up your differential gears. Take the carrier in your diff out. When you do, it is important to take the bearing caps off and set them down so you will know exactly how they came out and put them back the same way. Any shims and bearing races, the same. It is not hard, just keep careful track of how it all came apart. Use a pin punch to drive the roll pin holding the cross pin for the spiders in place on both carriers. Remove the spider gears on the Jeep carrier and remove the spiders. Remove the cross pin on the locker. Then carefully, with a finger over the top of the little springs, remove the springs with a very small screw driver. These little guys can fly for miles, so be careful to keep them covered when you do in case they get loose. Then remove the little alignment pins. The inner halves of the locker will now move enough to one side to remove them. Then remove the outer halves. Reassemble and add oil and your done. Happy wheeling