I disconnected TOD today when I removed all of the interior. I marked the prop shaft with chalk. My thoughts, with TOD off, that gives me 2high, which means the front shaft should not spin at all. I drove it around the block. No TOD lights, which was a good sign, no vibration, no rumbling etc...I expected the prop shaft to be right where I left it. (I have manual front hubs). In my mind, it felt peppier and more responsive. May be a psychological thing. I checked the chalk mark, the prop shaft had rotated!
If TOD fails, does it automatically go to a 50/50 split? I will have to put the whole truck up on jack stands tomorrow and see what is going on under there.
Any thoughts?