Not all Dana axles have the model number cast on the housing. It can be very difficult to tell a Dana 60 from a Dana 70, as they have nearly identical covers with exactly the same bolt pattern. One way to tell if you have a Dana 60 or Dana 70 is to measure the cover flange height (yellow arrow). The Dana 60 flange height is approximately 1" high. The Dana 70 flange height is about 1¼" high.