[Ironangel]

Both my 72's have the type the OP has shown. So you do have the correct carrier bearing. The way both of yours have broken I'm guessing your drive shaft(s) are out of balance and possibly bent. Your not feeling it because the bearing stem is absorbing most of the vibration. Your shafts may also be indexed incorrectly causing or at least contributing to the problem. I would buy a new one and take the whole assembly, both shafts and the bearing to a drive shaft shop and have them balance the whole unit. If you could secure a camera or a phone to take a video of the bearing while you take a short drive I bet you'd see that thing wobble...