It comes with the carrier bearing as one unit and is not replaceable all by itself. Timken manufactures the carrier bearings. Most auto parts stores carry them. Easy to change out and inexpensive. The only hard part can be getting the old one off the driveshaft. When you first look at it, you'll think that you can slide the old carrier bearing off the front driveshaft when under the truck by simply sliding it off. Maybe you'll get lucky, but you'll probably have to remove the front driveshaft so that you can put in in a bench vice to carefully cut the bearing off using an angle grinder and a Dremel. When the cut starts to get close to the driveshaft, stop and finish it with a cold chisel. The cold chisel acts like a wedge when you drive it into the cut and it will snap the remaining metal to release the carrier bearing from the driveshaft. The new carrier bearing slides right on. Careful for the rounded collar that is in front of the bearing. It is attached to the driveshaft and is not part of the carrier bearing. so be careful working around it.
Matt
