In another thread, I was told that our trucks don't have any kind of disconnect for the 4x4 system except for the transfer case. Is that true? Every 4x4 I've had before has had either manual/auto hubs or a center axle disconnect. So on our Titans, both axle's and the diff are connected together and turning at all times? They all have Dana axle's? What model? One final question. I see a lot of talk about Trac Lock diffs. How are these different than Detroit Locker's? Can we use Detroit Locker's?