Quote Originally Posted by tom4bren View Post
Not Zakly.

If you're going for maximum mpg, then you'll still need the locking hubs. Without them, you're still spinning the 3rd member in your front diff & hence the front prop shaft. That'll eat up a little bit of your mpg.
I think the spinning of the 3rd happens anyway due to drag in the TC. There is probably a little more drag at the wheels though without disconnecting the hubs.