It seems that about once a week someone posts a pic of a 14 bolt carrier wanting to know if it's an open differential or a Gov-bomb. Sometimes it is hard to tell from the pic what it is because of the angle, and difficult to decide if it has 3 pins or 4 pins. I was looking at some pictures I have saved of 14 bolt carriers and noticed something: Each one appears to have 12 ring gear bolts. In the pic of the Gov-bomb it appears to have 4 ring gear bolts between a set of pins, but on the open differential there are only 3 bolts between each set of pins. By using this method it would seem easy to ID a differential just by counting the number of ring gear bolts between a set of pins. Would this method of identification work?