kiwipete wrote: I have not driven a truck with triple diff locks before
Apart from the front and rear lock, you will not notice any difference. When people state triple diff locks, it really means front and rear, as the ctr one only brings you up to a std part time 4wd with transfer case in (and hubs locked obviously).
Having said that, everything is much easier when you can cross axle lock both ends.
Congrats on your purchase.